Download IQS17 / IQS117 Family IQ Switch - ProxSense™ Series

IQ Switch® ProxSense™
IQS17 / IQS1171 Family
IQ Switch® - ProxSense™ Series
Capacitive Touch Sensor, Load Control and User Interface
ProxSense offers differentiated proximity and physical contact outputs.
Features
• Automatic environment compensation
• Multiple User Interfaces
• Controls high voltage external regulators with
minimum external components
• Series Onboard Regulator
• 50 – 60Hz supported
• 2- and 3-Wire supported
• Digital signal processing
• Leading-edge (Forward Phase Control) dimming
using Triac Control
• Trailing-edge (Reverse Phase Control) dimming
using FET Control
• PWM load control in DC Mode
®
• IQ Switch Technology
• Soft-on and soft-off
• Auto-off with Advanced Auto-off Warning (AAOW)
• Find-In-The-Dark (FITD)
• Touch/Switch interface
• Rheostat dimming supported
• Different touch and proximity sensitivity settings
• CFL load compatibility
IQS117 IC – 20 pin SSOP
Applications
• Domestic/Corporate wall switches
• Appliance controls
• Desk lamps
• Other fixed or semi-fixed lighting applications
• Proximity Sensors
ProxSense™ is a fully integrated capacitive sensor, user interface and load controller. The IC may be
used in a variety of consumer lighting applications, varying from domestic wall switches to desk lamps,
as well as domestic appliances. The integrated design minimises external components while taking
care of a number of essential and comfort features. The IC is a stand-alone device, capable of
controlling a triac or transistor to power the load. The device can be powered from high voltages using
minimal external components. This is made possible by the onboard regulator control. The device also
features an internal regulator, ensuring a stable operating voltage. These features greatly reduce the
cost of systems employing the IQS117.
Through unique patented technology a number of additional functions are offered over and above the
traditional on/off operation of electro-mechanical switches. ProxSense™ is capable of detecting a
differentiated touch or proximity condition through almost any dielectric.
1
New Name: IQS117
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 1 of 50
February 2008
IQ Switch® ProxSense™
Contents
1
2
3
4
Overview .............................................................................................................................. 3
Pin Descriptions ................................................................................................................... 4
Typical Connection Diagram ................................................................................................. 5
Capacitive Sensing ............................................................................................................... 6
4.1 Sense Plate Capacitance ................................................................................................................. 6
4.2 The Charge Transfer principle .......................................................................................................... 6
4.3 Designing the Capacitive Sensing Circuit ......................................................................................... 7
4.3.1
Oscillator (Transfer Rate) ........................................................................................................ 7
4.3.2
Cs Capacitors.......................................................................................................................... 8
4.3.3
Determining a Proximity/Touch ..............................................................................................10
5
Regulator Design ............................................................................................................... 11
5.1
5.2
5.3
5.4
5.5
5.6
6
2 Wire/ 3 Wire Operation .................................................................................................................11
LED..................................................................................................................................................11
External Boost- and Series Regulator – Proposed Leading-edge 2 Wire Design ............................13
Internal Shunt Regulator – Proposed Leading-edge 3 Wire Design ................................................15
External Boost- and Series Regulator – Proposed Trailing-edge 2 Wire Design .............................16
Internal Shunt Regulator – Proposed Trailing-edge 3 Wire Design .................................................17
Load Control ...................................................................................................................... 18
6.1 Trailing-edge or Leading-edge .........................................................................................................18
6.2 AC or DC Mode ...............................................................................................................................18
6.3 Triac Control ....................................................................................................................................18
6.3.1
EMC Filter ..............................................................................................................................19
6.3.2
Incandescent / CFL Load .......................................................................................................19
6.4 MOSFET and IGBT Control .............................................................................................................20
6.4.1
EMC Filter ..............................................................................................................................21
6.4.2
Incandescent / CFL Load .......................................................................................................21
6.5 DC Loads.........................................................................................................................................21
6.6 Desensitising the System ................................................................................................................21
7
Special Features ................................................................................................................ 22
7.1
7.2
7.3
8
Rheostat ..........................................................................................................................................22
ESD Protection ................................................................................................................................23
Switch ..............................................................................................................................................23
User Interface (UI) .............................................................................................................. 24
8.1.1
Actuation Type .......................................................................................................................26
8.1.2
Find-in-the-Dark (FITD) ..........................................................................................................26
8.2 User Interface Algorithm ..................................................................................................................26
8.2.1
Mode Stepping .......................................................................................................................26
8.2.2
Single Mode ...........................................................................................................................29
8.2.3
Memory Mode ........................................................................................................................31
8.2.4
Hard on/off mode ...................................................................................................................33
8.2.5
Momentary Output .................................................................................................................34
8.3 User Interface Enhancements .........................................................................................................35
8.3.1
Continuous Dimming Mode ....................................................................................................35
8.3.2
CFL Mode ..............................................................................................................................37
8.3.3
Rheostat dimming ..................................................................................................................38
8.3.4
Auto-off with AAOW ...............................................................................................................38
8.4 Typical Applications .........................................................................................................................40
8.4.1
Desk Lamp .............................................................................................................................40
8.4.2
Wall Switch.............................................................................................................................40
8.4.3
Appliance Control ...................................................................................................................40
9 Schematics ........................................................................................................................ 41
10
Device Specifications .................................................................................................... 44
10.1
10.2
10.3
10.4
10.5
10.6
Absolute Maximum Specifications ..............................................................................................44
Operating Conditions ..................................................................................................................44
Timing Characteristics ................................................................................................................45
Defined Power Levels (For Resistive Loads) ..............................................................................46
Device Designator.......................................................................................................................47
Packaging Information ................................................................................................................48
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 2 of 50
February 2008
IQ Switch® ProxSense™
1
Overview
®
The ProxSense™ IQS117 is based on Azoteq’s patented IQ Switch technology, which has been tried and
tested in the consumer lighting market. In addition to the unique User Interfaces (UIs) available, actuation is
now possible through touch or proximity of a sense plate. Reliable and trouble-free operation is achieved by
advanced features, ensuring robustness of the product.
The IC is designed to operate under AC and DC conditions. Depending on the supply conditions, the device
is capable of controlling both AC and DC loads, using inexpensive external circuitry. The IQS117 eliminates
the need for a microprocessor to control the load, greatly reducing the system costs. The IQS117 can be
used with any incandescent or halogen load. CFL's are also supported, but due to their physics they are not
dimmable.
The IQS117 features advanced regulator control, allowing the device to be powered from high voltages
using minimal external circuitry. The device can control an external boost-, serial- and/or shunt regulator.
This eliminates the need for expensive external regulators. The device also features an internal regulator
that generates a stable operating voltage.
A number of user interface (UI) options are available, presenting the user with unique ways of dimming the
load. These include using fixed preset levels, a touch-and-hold dimming scheme, or storing a preferred
dimming level in memory.
The device helps the user in detecting the switch position in the dark, either by lighting the main load at a
certain dimming level, or using a backlight.
A dimming level can be selected using a touch interface with a sense plate, pressing a low voltage
electromechanical switch, or using a rheostat.
Please refer to page 50 for a list of applicable patents.
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 3 of 50
February 2008
IQ Switch® ProxSense™
2
Pin Descriptions
Pin
Name
Type
Function
1
TEST
Digital Input
Reserved for IC testing (Do not connect)
2
ZC
Analog Input
Zero Cross Detection
3
VSW
Analog Input
Load Selector
4
TG
Output
Triac/ MOSFET/ IGBT gate signal (AC) / PWM signal (DC)
5
LED
Analog Output
LED Drive Signal
6
VSS
Ground
GND reference
7
VDD
Analog Output
Internal Regulator Output (Connect 100nF Capacitor to VSS)
8
HVSENSE
Analog Input
Boost Regulator Voltage Sense
9
SHNT
Output
Open Drain NMOS. Shunt/Serial Regulator Control
10
VDDHI
Supply Input
Supply Voltage Input
11
PWRCNTR
Output
Boost Regulator Control
12
TRPSEL
Input
Proximity Sensitivity Selection
13
NC
No Internal
Connection
-
14
CX
Analog I/O
Sense Plate
15
CS
Analog I/O
Capacitive Sensing Charge Collection
16
NC
No Internal
Connection
-
17
SW
Digital Input
Active High Switch Input, 10kΩ internal pull-down
18
REOIN
Analog Input
Rheostat Input. Touch Sensitivity Selection
19
REOCNTR
Input
Output
2 / 3 Wire Selection
Rheostat FET Control
20
OSC
Custom
OSC frequency adjust. Resistor to VDD
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 4 of 50
February 2008
IQ Switch® ProxSense™
Typical Connection Diagram
IQS117
EXTERNAL
REGULATOR
COMPONENTS
CONTROLLED
BY IQS117
VDD
SHNT
HVSENSE
PWRCNTR
C3
CS
100nF
CS
RX
1M
R10
VDDHI
GND
CX
R12
SENSE PLATE
1M
ZC
GND
1M
C10
R35
GND
R36
VSW
1
10k
R15
LOAD
3
CFL LOAD
ENABLE/DISABLE
PROXIMITY
SENSITIVITY
SETTING
TRPSEL
1M
GND
10k
100pF
R11
GND
GND
A1
D1
OSC
1
SW
GND
3
R39
C25
100nF
G
R25
2 WIRE/
3 WIRE
SETTING
REOCNTR
TG
R38
10k
A2
ROSC
C15
100pF
10k
R16
1M
2
10K
REOIN
VSS
LED
GND
LED
R37
GND
10k
3
TOUCH
SENSITIVITY
SETTING
2
S
RHEO
Q2 D
G 1
RLED
GND
3
OPTIONAL
RHEOSTAT
GND
Figure 3-1: Connection Diagram for an AC supply in 3-wire mode, Leading Edge dimmer with Triac
Control
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 5 of 50
February 2008
IQ Switch® ProxSense™
4
Capacitive Sensing
4.1
Sense Plate Capacitance
The sense plate can be any electrically
conductive object. This includes glass or
perspex plates with a conductive surface, or
the base of a metal desk lamp. The sense
plate is connected to the CX Pin.
The capacitance of the CX plate is referred
to as CX.
4.2
Figure 4-1 : Coupling with the human
hand will increase the capacitance of the
sense plate.
There exists a capacitance between any
reference point relative to ground, as long as
electrical isolation exists between them. If
this reference point is a sensing plate, it
helps to think of it as a capacitor. The
positive plate of the capacitor is the sensing
plate, and the negative plate is formed by
the surrounding area (virtual ground
reference, labelled 1 in Figure 4-1).
When an object is brought into proximity of
the sensing plate, there will be increased
coupling between the two and the
capacitance of the sense plate, relative to
ground, will increase. For example, a human
hand will increase the sense plate
capacitance as it approaches the sense
plate. Touching the plate will increase the
capacitance significantly.
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
The Charge Transfer
principle
To measure a change in CX, the IQS117
employs the charge transfer method of
capacitive sensing. Charge is continuously
transferred from the CX capacitance into a
charge collection capacitor, referred to as
CS, until the voltage on CS reaches VTRIP.
Throughout this document the following
applies when the capacitive sensing is
mentioned: the transfer cycle refers to the
charging of CX and transferring the charge to
the CS capacitor. The charge cycle refers to
process of charging CS to VTRIP using charge
transfers.
The IQS117 is capable of adjusting to
environmental changes. It tracks the
average capacitance of the sense plate.
This average value is compared to the latest
charge cycle to determine whether a
proximity or touch occurred.
IQS117 Datasheet v2.03
Page 6 of 50
February 2008
IQ Switch® ProxSense™
4.3
Designing the Capacitive Sensing Circuit
Figure 4-2 shows the circuitry needed to
implement the capacitive sensing.
IQS117
VDD
CS
R35
10k
CS
ROSC
GND
SENSE_PLATE
TRPSEL
R36
10k
OSC
PROXIMITY
SENSITIVITY
SETTING
POPULATE
EITHER
OR NONE
RX
CX
REOIN
10k
GND
R37
VSS
GND
GND
Figure 4-2: Capacitive Sensing Circuit
4.3.1 Oscillator (Transfer Rate)
The oscillator frequency is set by ROSC. The
oscillator is used to determine the rate at
which the charge transfers occur. Maximum
efficiency is achieved when enough time is
allowed to fully charge CX to VDD and then
completely transfer this charge to the CS
capacitor.
Table 4-1: Different values for the
Transfer Rate as determined by ROSC
ROSC
Transfer Rate
10kΩ
625kHz
22kΩ
300kHz
30kΩ
230kHz
75kΩ
95kHz
100kΩ
70kHz
The series resistor Rx in the CX charge path
influences the transfer cycle negatively. This
resistor is needed to ensure that the user is
safe from electrical shock when touching the
sense plate (if the conductive area is not
isolated) and also provides extra ESD
protection. 300 kHz is a good choice of
transfer rate under normal circumstances.
Typically RX is ranged between 1kΩ and
2kΩ.
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 7 of 50
February 2008
IQ Switch® ProxSense™
Figure 4-3: Ideal charge transfers
Figure 4-5: Non-ideal charge transfers
Figure 4-4: Charge cycle as the result of
ideal charge transfers
Figure 4-6: Charge cycle as the result of
non-ideal charge transfers
Figure 4-3 and Figure 4-4 shows how the
ideal sense plate voltage of a charge
transfer and charge cycle should look.
Notice that in Figure 4-3, the sense plate
charges up to VDD.
Figure 4-5 and Figure 4-6 shows the sense
plate voltage of non-ideal charge transfers
and the resulting charge cycle. Notice in
Figure 4-5 that the sense plate does not
charge up to VDD, but to 3.08V instead.
Comparing Figure 4-6 to Figure 4-4, the
offset is due to the fraction of the sense
plate charge not being transferred to the CS
capacitor. These problems can be corrected
by either decreasing the transfer rate (by
increasing ROSC), or decreasing RX.
capacitance by a
few Pico-farads,
depending on the probe used. This will have
an instant negative influence on the
sensitivity of the system when it is attached.
After a short while the system will adjust to
accommodate this change.
4.3.2 Cs Capacitors
The function of the CS capacitor is to collect
the charge from the sensing plate. It also
influences the sensitivity of the system. The
charge cycle duration refers to the time
needed to complete one CS charge cycle
when no proximity or touch is occurring
(thus the longest duration of a charge cycle
with the current system parameters). Use a
X7R or better capacitor. Please refer to the
“Capacitor Selection Guide” (document
number AZD0002) regarding the choice of
CS capacitor, at www.Azoteq.com.
Please note that attaching a probe to the
sense plate will increase the sense plate
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 8 of 50
February 2008
IQ Switch® ProxSense™
Figure 4-7: Timing of the charge cycles
A bigger CS capacitor will ensure that the CX
capacitance is computed with more
resolution. This will increase the sensitivity
of the device.
If an AC supply is used, the charge cycle is
always synchronized to the positive zero
crossings of the AC line voltage, as shown
in Figure 4-7.
The charge cycle will start TCHARGE after the
positive half cycle started. If the charge
cycle is allowed to continue until the
following positive half cycle starts, it will
have a negative influence on the response
time of the system, since then the next
charge cycle will only be started in 2 half
cycles' time. If the charge cycle is too short,
it will influence the sensitivity of the system
negatively. The ideal charge cycle ends
100µs before the end of the half cycle. Thus
the ideal charge cycle duration is (9.9 ms –
TCHARGE) for 50 HZ and (8.6ms – TCHARGE) for
60 Hz. The charge cycle duration can be
determined by probing the CS pin with an
oscilloscope.
minimum and maximum charge cycle
duration is determined by the following.
1. Minimum – every charge cycle
must consist of at least 32 charge
transfers.
14
2. Maximum – no more than 2
charge transfers are allowed in a
charge cycle.
A larger sense plate surface will require a
larger CS capacitor and vice versa. Since the
CX capacitance is normally unknown, it is
easiest to design the CS capacitor using a
trial-and-error method. The CS capacitor will
typically be ranged between 10nF to 1µF.
In DC mode, the IQS117 generates an
internal reference and synchronises the
charge cycles using the same method as
described for an AC supply.
These recommended charge cycle duration
values are only design guidelines. The
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 9 of 50
February 2008
IQ Switch® ProxSense™
RANGE 1
RANGE 2
Table 4-2: Proximity Algorithm Sensitivity
TRPSEL Condition at POR
LOW
FLOATING
D
B
D
A
HIGH
E
C
Figure 4-8: Proximity Algorithm Sensitivity Scale
4.3.3 Determining a
Proximity/Touch
The IQS117 is capable of differentiating
between a sense plate proximity and touch.
The sensitivity of detecting these conditions
is determined at Power-On-Reset (POR)
and can be adjusted.
4.3.3.1 Proximity Sensitivity
The Proximity Algorithm Sensitivity is
determined at POR by the condition of the
TRPSEL pin. Depending on the device in
the IQS117 family (see section 8), two
ranges of Proximity Sensitivity is available,
as described in Table 4-2.
Please note that noise in the environment
will cause the IQS117 to falsely detect
proximities if the sensitivity is increased too
much. If the environment of the system is
prone to noise, the sensitivity of the system
needs to be decreased, at the expense of
the range of the proximity detection.
The proximity detection sensitivity is
determined by three factors.
1. The value of CS determines the
resolution of the CX computation. A
higher CS will increase the
resolution and the sensitivity.
2. The sensitivity of the detection
algorithm, as determined by the
condition of the TRPSEL pin at
POR.
3. The way in which the sense plate
couples with an approaching human
hand will also influence the
sensitivity.
4.3.3.2 Touch Sensitivity
The Touch Algorithm Sensitivity is
determined at POR by the condition of the
REOIN pin. The pin is multiplexed and also
serves as the rheostat input. Two settings
are available, as described in Table 4-3.
When a rheostat is connected to the
IQS117, a pull-down resistor is not allowed
on the REOIN pin. This implies that only the
higher touch sensitivity setting is available
when a rheostat is connected to the IC.
Table 4-3: Touch Algorithm Sensitivity
REOIN floating or connected to rheostat
REOIN pulled low
High Touch Sensitivity
Low Touch Sensitivity
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 10 of 50
February 2008
IQ Switch® ProxSense™
5
is selected by a pull-up resistor on the
REOCNTR pin.
Regulator Design
This chapter contains a conceptual
description of how the IQS117 external
regulators work. Please refer to the IQS117
regulator application note on the Azoteq
website for detailed design examples.
It is important that the IQS117 has a very
stable operating voltage. The input voltage
(VDDHI) is regulated to a stable voltage VDD. If
the VDD voltage fluctuates it will have a
detrimental effect on the charge transfer
which could ultimately cause false proximity
detections. The IQS117 is capable of
controlling external regulators which can be
connected in a variety of configurations,
allowing the device to be operated in both
AC and DC environments. It is able to
control a series, shunt and boost regulator
which can operate independently or in
conjunction with each other.
5.1
2 Wire/ 3 Wire Operation
The device can be configured to work in
either a 3 Wire or a 2 Wire application.
Figure 5-1: 3 Wire Setup
When the IQS117 operates in 3 Wire Mode,
TM
the ProxSense circuit must be connected
between the live and neutral supply
connections. The load must be connected
between the switching device and live. In
TM
this setup configuration, the ProxSense IC
is continuously supplied with power, since it
is connected in parallel with the load. These
operating conditions are only possible if both
the neutral and live connections are
available. Typical applications for this setup
are lighting solutions that plug into a wall AC
outlet, like bed- or desk lamps. 3 Wire Mode
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
Figure 5-2: 2 Wire Setup
Lighting wall switches in buildings are
usually connected between live and the
TM
load. To use the ProxSense circuit as a
wall switch, it must be connected in series
with the load, called 2 Wire Mode. This will
TM
IC not being
result in the ProxSense
supplied with power from the live connection
while the load is switched ON. The regulator
design and timing ensures that the IC is
powered. 2 Wire mode is selected by a pulldown resistor on the REOCNTR pin.
5.2
LED
The current drawn by the LED has an
important influence on the design of the
regulator. The LED pin is capable of
sourcing an instantaneous current of
ILED_INST_MAX. In AC mode, or the 2 wire DC
option, the LED pin is pulsed with the
VDDHI voltage for TBOOST after TZCDB from
the start of every half cycle when it needs to
be on, as shown in Figure 5-4. In a 3 Wire
DC Mode the LED will be continuously
sourced with VDDHI while in the on
condition. RLED must be used to limit the
instantaneous LED current to ILED_INST_MAX or
less. Two or more LED's can be connected
in parallel, as long as the sum of their
currents does not exceed the ILED_INST_MAX
limit. If the LED needs to be sourced with
more than ILED_INST_MAX, the LED pin signal
can be used to control a transistor. The LED
can now be sourced directly from VDDHI, and
the transistor can be used to switch the LED
ON and OFF.
The current drawn by the LED must be
accounted for when designing the regulator.
IQS117 Datasheet v2.03
Page 11 of 50
February 2008
IQ Switch® ProxSense™
IQS117
When in 3 Wire DC mode the LED pin
voltage remains high when the LED is
turned on and the average LED current is
also given by the same equation.
V
I LED _ AVG = DDHI
5-2
RLED
RLED
LED
GND
Figure 5-3: LED Circuit
The instantaneous LED current during the
TBOOST pulse is determined using
I LED _ INST =
VDDHI
RLED
In AC mode and the 2 wire DC option, with
the LED ON voltage as in Figure 5-4, the
average LED current is given by
V
2(TBOOST )
I LED _ AVG = DDHI
5-3
RLED
TAC
with TAC the period of the AC supply.
5-1
Figure 5-4: LED pin voltage in ON condition using the AC Mode, or 2 Wire DC Mode
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 12 of 50
February 2008
IQ Switch® ProxSense™
5.3
External Boost- and Series Regulator – Proposed Leadingedge 2 Wire Design
RHIGH
D6
R61
R66
RINT2
R64
2
3
Q3
Q5
1
R60
1
D5
D8
3
2
R71
C3
+
C60
2
C61
R65
1
2
100nF
S
G 1
3
RINT1
3
Q4
GND
D
R62
R63
GND
Figure 5-5: Conceptual Boost- and series regulator
At start up, the IQS117 requires ISTARTUP.
This current must be provided by the low
current path through RHIGH, as depicted in
Figure 5-5. The value of RHIGH can be
determined using
RHIGH =
2V AC _ RMS − VBOOST
(2)( I STARTUP )
.
5-4
will rise. When HVSENSE reaches VHVSENSE,
PWRCNTR will go low and Q4 and Q3 will
switch off.
For 3 Wire applications, the PWRCNTR pin
is allowed to go high at any time the
HVSENSE voltage drops below VHVSENSE.
For 2 Wire applications PWRCNTR is only
allowed to be active for TBOOST during every
half cycle, as shown in Figure 5-6. When the
LED is on, the LED pin pulses will be at the
exact same time that the PWRCNTR pulses
are allowed to occur.
The VBOOST voltage can be chosen with the
voltage divider formed by R64 and R65:
VBOOST = VHVSENSE
R64 + R65
R65
5-5
A typical value for VBOOST would be between
7V and 30V.
Figure 5-6: PWRCNTR Pulse (AC Mode)
After the IQS117 is powered up, it is capable
of regulating the high side voltage (VDDHI)
using the boost regulator. The HVSENSE
pin is an input to an internal comparator
which senses on VHVSENSE. When the
HVSENSE voltages drops below VHVSENSE,
the PWRCNTR pin goes active high and Q4
and Q3 will be switched on. With Q4
switched on, current will flow through Q3
(high current path) and the VBOOST voltage
The RMS voltage of the supply during TBOOST
can be determined by:
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
When the PWRCNTR pin is active, the
boost regulator is enabled. D5 half wave
rectifies the AC input, so C60 will not be
charged when PWRCNTR is active in the
negative half cycle. This means C60 can only
be charged for a maximum time of TBOOST
during each AC cycle. It is important that
enough charge is transferred into C60 during
this short period to power the IQS117 during
the rest of the AC period.
IQS117 Datasheet v2.03
Page 13 of 50
February 2008
IQ Switch® ProxSense™
VBOOST RMS
with
=
1
TBOOST
2
TZCDB +TBOOST
∫ (( 2 )V
AC _ RMS
)
. sin( 2π . f AC .t ) dt
5-6
TZCDB
f AC being the frequency of the AC supply.
The average boost current (high current path)
required during the PWRCNTR pulse is
determined by the IC current and the
instantaneous
LED
current
during
the
PWRCNTR pulse. The IC current needs to be
translated to the TBOOST period.
I BOOST
T
= I IQS117 AC + (2.I LED _ INST )
TBOOST
5-7
If the LED is not turned on, less power will be
needed by the system. The regulator will
automatically adjust the ON time of the
PWRCNTR pulse during. This means that the
average IBOOST will be smaller when the LED is
not on, compared to when the LED is powered.
The breakthrough voltage of D6 needs to be
higher than the regulated VBOOST voltage as the
purpose of the zener is to protect the circuit of
any over voltages.
Q5 is used to realize an external serial regulator
by connecting the base of the transistor to the
open drain SHNT pin. The SHNT voltage will be
adjusted to ensure that Q5 is switched on at a
level that will maintain the voltage drop VCE for
the correct VDDHI voltage.
This type of regulator is well suited to 2 wire
applications, but will also work with 3 wire
applications. Power is only used as it is required
by the system, making this a very efficient
regulator.
For 2 wire applications the ripple of the VBOOST
voltage needs to be designed for. The choice of
C60 will determine the ripple of the VBOOST
voltage. The value can be determined using:
(iIQS117 )(TAC − TBOOST ) + (iLED _ INST )(TBOOST )
5-8
C60 =
∆V
with ∆V being the change in the VBOOST voltage.
Equation 5-8 only applies to 2 Wire applications.
Copyright © Azoteq (Pty) Ltd 2007.
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IQS117 Datasheet v2.03
Page 14 of 50
February 2008
IQ Switch® ProxSense™
5.4
Internal Shunt Regulator – Proposed Leading-edge 3 Wire Design
RSERIES
D3
D4
+
C3
RINT3
C40
D
S
G 1
RINT4
GND
2
3
GND
Figure 5-7: Shunt Regulator
If SHNT is connected to VDDHI, a shunt
regulator is formed by an active zener internal to
the IQS117. Resistor RSERIES is used to design
the current flowing to the device. Zener diode D4
provides over-voltage protection and should be
chosen to be higher than VDDHI, but less than the
specified maximum voltage.
The current that is required through the series
resistance RSERIES when the LED is turned on
can be determined by:
I SHNTREG = I LED _ AVG + I IQS117
5-9
The RMS voltage over the series resistance is
given by:
VSERIES _ RMS =
2 (V AC _ RMS ) − VDDHI
5-10
2
RSERIES can now be determined from the results
of 5-9 and 5-10.
This type of power supply will always deliver a
fixed amount of current to the device. The part of
this allocated current that is not used by die
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 and the LED will be dissipated by the
SHNT pin. This means that the SHNT current
will be higher when the LED is off.
It is important that the maximum SHNT pin
current (ISHNT_MAX) is not exceeded. This can
happen for a larger ILED_AVG. For this situation,
the SHNT pin in Figure 5-7 can also be left
unconnected. This will cause all the excess
power to be absorbed by the zener diode D4,
allowing larger shunt currents.
With the shunt regulator as shown in Figure 5-7,
the function of diode D4 is only to provide overvoltage protection.
C40 must be 1µF to reduce oscillation of the
shunt regulator to a minimum.
Although this power supply is not as efficient as
the boost and series regulator, it is much more
cost effective. This supply regulator is
recommended for 3 wire applications. It will not
work with a 2 wire setup.
IQS117 Datasheet v2.03
Page 15 of 50
February 2008
IQ Switch® ProxSense™
5.5
External Boost- and Series Regulator – Proposed Trailingedge 2 Wire Design
3
Q3
D6
R61
Q4
C60
2
2
GND
D
C61
R65
1
C3
+
R62
3
GND
R66
RINT2
R64
100nF
S
G 1
3
RINT1
1
R60
Q5
1
3
2
R71
2
RHIGH
R63
GND
Figure 5-8: Conceptual Boost- and series regulator for Trailing-edge dimmer
The main difference between the Trailing-edge
and Leading-edge boost regulator is the fullwave rectifier used on the leading edge dimmer.
Conceptually both regulators work the same.
Equations 5-4, 5-5 and 5-6 stay the same when
using the Trailing-edge boost regulator.
C60 can now be charged in every half cycle.
This causes equation 5-7 to change to
I BOOST = I IQS117
TAC
+ ( I LED _ INST )
2.TBOOST
and equation 5-8 to change to
T
(iIQS117 )( AC − TBOOST )
2
C60 =
∆V
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
5-11
5-12
IQS117 Datasheet v2.03
Page 16 of 50
February 2008
IQ Switch® ProxSense™
5.6
Internal Shunt Regulator – Proposed Trailing-edge 3 Wire Design
RSERIES
D4
+
C3
RINT3
C40
GND
2
D
S
G 1
RINT4
GND
3
GND
Figure 5-9: Shunt Regulator for Trailing-edge Dimmer
Since a full-wave rectifier is used with the
trailing-edge dimmer, equation 5-10 changes to
VSERIES _ RMS = 2 (V AC _ RMS ) − VDDHI
5-13
The rest of the regulator design is exactly the
same as in section 5.4.
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 17 of 50
February 2008
IQ Switch® ProxSense™
6
Load Control
6.1
Trailing-edge or Leadingedge
Devices IQS1170xx 00 – IQS1170xx 15
employs leading-edge dimming. A Triac is used
to power the load.
Devices IQS1171xx 30 – IQS1171xx 45
employs trailing-edge dimming. A High Power
MOSFET or IGBT can be used to power the
load. When using the device under these
conditions, a full-wave rectifier (bridge) must be
used.
6.2
AC or DC Mode
The IQS117 uses the ZC pin to detect whether
the device is being used with an AC or DC
supply voltage.
For Leading-edge AC operation, the ZC pin is
connected to the supply voltage via the circuit
shown in Figure 6-1. R12 should be in the order
of 1MΩ to limit current from the supply into the
pin.
For Trailing-edge AC operation, the ZC pin is
connected to the supply voltage via the circuit
shown in Figure 6-2. R12 should be in the order
of 1MΩ to limit current from the supply into the
pin during the positive half cycle. Due to the
bridge used with the trailing-edge dimmer, the
ground reference will never be lower than –VD of
the bridge diodes with respect to the live
connection. This problem can be fixed by using
the diode and R13 in Figure 6-2.
To set the device in DC mode, ZC must be
pulled low.
6.3
1M
R10
IQS117
R12
ZC
1M
1M
100pF
GND
GND
Figure 6-1: ZC circuit to be used with a
leading-edge dimmer with AC supply
1M
R10
IQS117
R12
1M
ZC
1k
1M
R13
R11
GND
Please note that information in Section 6.3 and
all subsections of Section 6.3 only applies to
devices IQS1170xx 00 – IQS1170xx 15.
When one of the IQS1170xx 00 – IQS1170xx 15
devices are configured to operate with an AC
supply voltage, a triac must be used to control
the load
C10
R11
Triac Control
C10
100pF
The triac is controlled by the TG pin. When the
triac needs to be fired to power the load, the
output of the TG pin is a square wave of
magnitude VDDHI. In Figure 6-3, resistor R25
ensures that the triac gate is pulled low when no
signal is applied. C25 is connected between the
TG pin and the triac gate and ensures that
enough current is provided to the triac gate
when it needs to be switched on.
GND
Figure 6-2: ZC circuit to be used with a
trailing-edge dimmer with AC supply
Copyright © Azoteq (Pty) Ltd 2007.
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IQS117 Datasheet v2.03
Page 18 of 50
February 2008
IQ Switch® ProxSense™
L1
6.3.1 EMC Filter
LIVE
LOAD(+)
LOAD(-)
IQS117
R30
A2
A1
100nF
TG
G
6.3.2 Incandescent / CFL Load
10K
C30
RV1
C25
D1
A filter is needed to ensure that the system
complies with EMC standards. The type of filter
recommended is shown in Figure 6-3 and
formed by L1, C30 and R30. Different countries
require different EMC standards on dimmer
controllers. Refer to local regulations for
compliance to these standards.
R25
VSS
NEUTRAL
GND
Figure 6-3: Triac circuit with the IQS117 (3
Wire)
Because of their physics, conventional compact
fluorescent lights (CFL's) are not dimmable. A
CFL only conducts for a short while during each
cycle. Conventional dimmers are not capable of
controlling CFL's. Even if the dimmer setting is
set at full power, the CFL will flicker, greatly
reducing its lifespan.
The IQS117 allows the user to select between
an incandescent and a CFL load.
By fixing the VSW pin voltage at
V DD
(within
2
5% accuracy) an incandescent load will be
selected. This will enable the user to select
various dimming levels.
Figure 6-4: Firing Angle of the Triac
The firing angle of the triac (referred to as θ) is
measured from the end of each half cycle to the
beginning. A θ of 0° responds to the triac not
being switched, while a θ of 180° indicates that
the triac will be fired at the start of each half
cycle. The power transferred to the load is
dependant on the value of θ. Figure 6-5 shows
the load and triac gate current for a θ of 90°.
When the VSW pin is either pulled high or low,
the IQS117 will enter CFL mode and the triac
will only be fired in the middle of the half cycle (θ
= 90°). This is the optimum point for driving a
CFL. The CFL will switch on at full power. The
user will not be able to dim the load. A CFL can
not be used with the 2 wire configuration
with the IQS117.
The circuit shown
user to make
incandescent and
double-throw type
can be operated
powered.
in Figure 6-6 will allow the
the choice between an
a CFL load. A single-pole,
switch is used. The switch
with the IQS117 still being
Figure 6-5: 50% Power transferred to the load
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IQS117 Datasheet v2.03
Page 19 of 50
February 2008
IQ Switch® ProxSense™
supply voltage, a High Power MOSFET or IGBT
must be used to control the load.
1M
R15
The Switching device is controlled by the TG
pin. When the switching device needs to be
turned ON to power the load, the output of the
TG pin is high with a magnitude VDDHI.
IQS117
3
CFL LOAD
ENABLE/DISABLE
1
VSW
C15
100pF
1M
2
The time when the switching device is turned is
measured in degrees from TCHARGE after the start
of each half cycle to the end, see Figure 6-7. A θ
of 0° responds to the switching device not being
turned on, while a θ of 180° indicates that the
switching device is always on. The power
transferred to the load is dependant on the value
of θ.
R16
VSS
GND
Figure 6-6 : Circuit used to select a
CFL/Incandescent load.
(Position2 = Incandescent, Position3 =CFL).
6.4
MOSFET and IGBT Control
Figure 6-8 shows the circuit needed to use a
high voltage MOSFET to control the load.
Please note the full-wave rectifier needed to
ensure that the current through the switching
device is always positive.
Please note that information in Section 6.4 and
all subsections of Section 6.4 only applies to
devices IQS1171xx 30 – IQS1171xx 45.
When one of the IQS1171xx 30 – IQS1171xx 45
devices are configured to operate with an AC
Figure 6-7: Firing Angle of the MOSFET or IGBT
LIVE
LOAD(+)
LOAD(-)
GND
R25
2
D
Q1
S
G 1
R26
IQS117
TG
C26
C25
3
VSS
NEUTRAL
GND
Figure 6-8: High Voltage MOSFET circuit with the IQS117 (3 Wire)
Copyright © Azoteq (Pty) Ltd 2007.
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IQS117 Datasheet v2.03
Page 20 of 50
February 2008
IQ Switch® ProxSense™
6.4.1 EMC Filter
The circuit formed by C25, C26, R25 and R26
allows the rate at which the switching device
turns on to be controlled. If this rate is
decreased enough it will ensure that the dimmer
complies with EMC regulations. Please note that
the decreased turn-on-rate of the switching
device will increase the amount of power
dissipated in the device and may cause some
issues with heat. Please refer to local
regulations for EMC compliancy.
6.6
6.4.2 Incandescent / CFL Load
The IQS1171xx 30 – IQS1171xx 45 devices are
not capable of controlling CFL loads. The VSW
pin must always be pulled low.
6.5
DC Loads
LOAD(+)
LOAD(-)
IQS117
VPOS
3
D
Q1
S
G 1
If any device in the IQS117 family is configured
to operate with a DC supply voltage, a transistor
is used to control the load. The transistor will be
controlled using the TG pin. The output of the
TG pin is a 100Hz PWM signal with amplitude
VDDHI. The VSW pin can be left unconnected. On
the IQS1170xx 11, the duty cycle of the TG
PWM signal is 100% for the ON condition. The
rest of the power levels are specified in section
10.
R20
TG
2
Desensitising the System
Whenever the load is turned on, the proximity
detection sensitivity is decreased to compensate
for any noise that may be caused by switching
the load. Also, after the load is turned off, the
device will ignore any proximity detected for
TPROXIGNR. This allows the user time to take his
hand away from the sense plate after switching
the load off without having the device going into
FITD mode. During this time, the LED will light
up when a proximity occurs, but it will not latch
on for TLATCH. Touch conditions will not be
ignored during this period.
VSS
GND
GND
Figure 6-9: A MOSFET circuit to control a DC
load
VLOAD
0
5ms
10ms
15ms
20ms
VDDHI
TG 0
Figure 6-10: The PWM pulse signal with load at 50% power
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IQS117 Datasheet v2.03
Page 21 of 50
February 2008
IQ Switch® ProxSense™
7
Special Features
7.1
Rheostat
When a rheostat is connected to the IQS117 as
shown in Figure 7-1, it replaces any other
method of dimming selection. The position of the
wiper will determine the dimming level of the
load.
resistance on the REOIN pin. To determine the
wiper position, Q2 is turned on and CS is again
charged to VTRIP through the resistance on the
REOIN pin. The ratio between the lengths of the
two charges reveals the position of the rheostat
wiper.
A rheostat connected to the device will override
any other modes determined by the user
interface. The rheostat will be the only factor in
determining the dimming level. Actuations will
only be used to turn the load on and off.
IQS117
2
REOCNTR
1 G
S
Q2
D
RHEO
3
The rheostat will be measured in the negative
half cycle of the supply voltage if an AC supply
is used or the negative half cycle of the internal
50Hz reference if the device is used in DC
mode. The device will alternate between
measuring the full range and the wiper position,
as described in Figure 7-2.
REOIN
Figure 7-1: Rheostat connected to the
IQS117
At POR, the IQS117 determines whether a
rheostat is present. The CS capacitor is utilised
to determine the wiper position. To determine
the full range of the rheostat, Q2 is turned off and
the CS capacitor is charged to VTRIP through the
The designer must always ensure that the
rheostat Full Range Charge duration is shorter
than the supply voltage half cycle. A typical
value for the rheostat resistance is 50kΩ. When
a rheostat is connected, the REOIN pin cannot
be pulled low to execute a Touch Level
selection.
Figure 7-2: Measuring the Rheostat
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IQS117 Datasheet v2.03
Page 22 of 50
February 2008
IQ Switch® ProxSense™
7.3
The pins on the IQS117 are designed with extra
protection against electrostatic discharge (ESD).
Pins rated for 8kV ESD protection on the Human
Body Model:
• SW
• CX
• VSS
• VDDHI
Pins rated for 2kV ESD protection on the Human
Body Model
• TEST
• ZC
• VSW
• TG
• LED
• VDD
• HVSENSE
• SHNT
• OSC
• REOCNTR
• REOIN
• CS
• TRPSEL
• PWRCNTR
Switch
Some of the devices in the IQS117 family allow
the user to use a switch instead of touching the
sense plate. The device still uses the sense
plate to detect proximities.
IQS117
VDD
3
ESD Protection
SW
1
7.2
SW
Figure 7-4: Switch connected to the IQS117
Any Push-to-Make type switch can be used. A
10kΩ internal pull-down allows the switch to be
connected directly between the SW pin and VDD.
To determine if the switch is pressed, a
debounce period of TSW is used.
10k
R7
D2
2
SENSE_PLATE
IQS117
BAV99
C7
CX
3
10uF
1
RX
GND
Figure 7-3: External ESD protection
If the conductive area of the sense plate is not
electrically isolated from user, one type of circuit
the designer may include is described in Figure
7-3. This will provide the system with extra ESD
protection over that provided internal to the
device. The capacitance of D2 will influence the
system, so care should be taken when choosing
this diode.
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 23 of 50
February 2008
8
User Interface (UI)
Table 8-1: Summary of UI options available on the leading-edge IQS117 IC's
Find-in-the-Dark
User Interface Algorithm
Enhancements
(FITD)
Main
Actuation
Mode
Single
Hard Rheostat Continuous CFL Auto Backlight
light as
Memory
Stepping Mode
on/off dimming Dimming
Mode
off
FITD
Type
FITD
Proximity
Range
Typical
Application
IQS1170xx00
●
○
○
○
●
●
●
○
●
●
Switch
RANGE 1
Desk lamp
IQS1170xx01
●
○
○
○
●
●
●
○
●
○
Switch
RANGE 1
Wall switch
IQS1170xx02
●
○
○
○
●
●
●
●
●
●
Switch
RANGE 1
Desk lamp with
Auto-off
IQS1170xx04
●
○
○
○
●
●
●
○
●
●
Touch
RANGE 1
Desk lamp (touch)
IQS1170xx05
●
○
○
○
●
●
●
○
●
○
Touch
RANGE 1
Wall switch (touch)
IQS1170xx06
●
○
○
○
●
●
●
●
●
●
Touch
RANGE 1
Desk lamp (touch)
with Auto-off
IQS1170xx07
○
●
○
○
●
●
●
○
●
○
Touch
RANGE 1
Wall switch (touch)
IQS1170xx08
●
○
○
○
●
●
●
○
●
●
Switch
RANGE 2
Desk lamp
IQS1170xx09
●
○
○
○
●
●
●
○
●
○
Switch
RANGE 2
Wall switch
IQS1170xx10
○
○
●
○
○
●
●
○
●
●
Touch
RANGE 1
Desk lamp (touch)
– dimmer with
memory
IQS1170xx11
○
○
○
●
○
○
●
○
●
○
Touch
RANGE 1
Appliance Control
IQS1170xx12
●
○
○
○
●
●
●
○
●
●
Touch
RANGE 2
Desk lamp (touch)
IQS1170xx13
●
○
○
○
●
●
●
○
●
○
Touch
RANGE 2
Wall switch (touch)
IQS1170xx14
○
○
●
○
○
●
●
○
●
○
Touch
RANGE 1
Wall switch (touch)
- dimmer with
memory
IQS1170xx15
○
●
○
○
●
●
●
○
●
○
Touch
RANGE 2
Wall switch (touch)
Key: ● = Implemented ○ = Not implemented
Table 8-2: Summary of UI options available on the trailing-edge IC's
Find-in-the-Dark
User Interface Algorithm
Enhancements
(FITD)
Back
Single
Momentary Rheostat Continuous CFL AutoMain light Actuation
Mode
Memory
light
Mode
Stepping Mode
Output
dimming Dimming
off
as FITD
Type
FITD
Proximity
Range
Typical Application
IQS1171xx30
●
○
○
○
●
●
○
○
●
●
Switch
RANGE 1
Desk lamp
IQS1171xx31
●
○
○
○
●
●
○
○
●
○
Switch
RANGE 1
Wall switch
IQS1171xx32
●
○
○
○
●
●
○
●
●
●
Switch
RANGE 1
Desk lamp with Autooff
IQS1171xx34
●
○
○
○
●
●
○
○
●
●
Touch
RANGE 1
Desk lamp (touch)
IQS1171xx35
●
○
○
○
●
●
○
○
●
○
Touch
RANGE 1
Wall switch (touch)
IQS1171xx36
●
○
○
○
●
●
○
●
●
●
Touch
RANGE 1
Desk lamp (touch) with
Auto-off
IQS1171xx37
○
●
○
○
●
●
○
○
●
○
Touch
RANGE 1
Wall switch (touch)
IQS1171xx38
●
○
○
○
●
●
○
○
●
●
Switch
RANGE 2
Desk lamp
IQS1171xx39
●
○
○
○
●
●
○
○
●
○
Switch
RANGE 2
Wall switch
IQS1171xx40
○
○
●
○
○
●
○
○
●
●
Touch
RANGE 1
IQS1171xx41
○
○
○
●
○
○
○
○
○
○
Touch
RANGE 1
IQS1171xx42
●
○
○
○
●
●
○
○
●
●
Touch
RANGE 2
Desk lamp (touch)
IQS1171xx43
●
○
○
○
●
●
○
○
●
○
Touch
RANGE 2
Wall switch (touch)
IQS1171xx44
○
○
●
○
○
●
○
○
●
○
Touch
RANGE 1
Wall switch (touch) dimmer with memory
IQS1171xx45
○
●
○
○
●
●
○
○
●
○
Touch
RANGE 2
Wall switch (touch)
Desk lamp (touch) –
dimmer with memory
Microprocessor
Interface
Key: ● = Implemented ○ = Not implemented
IQ Switch® ProxSense™
Table 8-1 and Table 8-2 summarises the
functionality of every member of the IQS117
family.
will turn on during this period to help a user
locate the dimmer position in darkness, known
as the Find-in-the-Dark (FITD) mode. Some of
the ICs in the IQS117 family will also switch on
the main load at the LO power level during
TLATCH at a low power level. See Table 8-1 and
Table 8-2. This function is not available on the
IQS1171xx41. The IQS1171xx41 operation is
described in section 8.2.5.
8.1.1 Actuation Type
The actuation input is the user’s way of
interacting with the ProxSense™ system. Two
methods are available. The sense plate can be
touched, or a button between SW and VDD can
be pressed to make an actuation. The device
will only check for one of the two in determining
if an actuation is occurring. The method used for
actuations is determined by which IC in the
IQS117 family is used. The LED is pulsed at a
frequency of fLED_FLASH for as long as the user
actuates the switch or the touch interface. This
provides the user with feedback that an
actuation is being made (as a substitution to the
familiar ‘click’ of an electromechanical switch).
8.2
User Interface Algorithm
The designer can choose between one of four
different user interface algorithms available on
the IQS117 as described in the following
sections.
8.2.1 Mode Stepping
8.1.2 Find-in-the-Dark (FITD)
Upon the detection of a proximity, the IQS117
will indicate this for a period of TLATCH. The LED
Proximity
Detected
Long Press
before TLATCH
START
FROM
MIN
FITD Mode
Continuous dimming
for as long as the
actuation occurs
Long
Press
After TLATCH
Long
Press
Proximity
Detected
Short Press
before TLATCH
Short Press
LOAD ON
HI POWER
Continuous
Dimming
mode
START
FROM
MIN
LOAD OFF
Short Press
Short/Long
Press
after TLIMIT
Short/Long Press
before TLIMIT
LOAD ON
MED POWER
Short/Long Press
before TLIMIT
Short/Long
Press
after TLIMIT
Short/Long
Press
LOAD ON
LO POWER
Figure 8-1: Mode Stepping state diagram
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 26 of 50
February 2008
IQ Switch® ProxSense™
SW
SW
T < TSELECT
T > TSELECT
1
0
Power
Level
HI
Power
Level
HI
USER
LEVEL
SON
SAA
MIN
MIN
TFLASH
0
Mode Stepping actuation
Continuous Dimming actuation
Figure 8-2: Distinction between a short and a long actuation
Mode Stepping is the patented UI which has
been employed with great success in Azoteq’s
®
IQ Switch technology for flashlights and
headlamps.
device entering Continuous Dimming Mode. A
short flash for a period of TFLASH indicates to the
user that Continuous Dimming has started (see
section 8.3).
Figure 8-2 illustrates how the device will react
differently between a short and a long actuation.
An actuation for a period less than TSELECT will
result in the load being switched on at full power.
Actuations longer than TSELECT will result in the
Dynamic Switch Selection (DSS) is the method
whereby Mode Stepping is realised. Figure 8-3
illustrates the process. There are four fixed
power levels defined, HI, MED, LO and MIN.
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 27 of 50
February 2008
IQ Switch® ProxSense™
Figure 8-3: Mode Stepping timing diagram
With a short actuation (TSW < T < TSELECT) the
load will start up at MIN Power level for as long
as the actuation is valid, and then slew to HI
Power at a slope of SON. If the next actuation
(short or long) occurs before TLIMIT is reached,
the load will slew to MED Power and again to
LO Power if the next short actuation occurs
before TLIMIT is reached.
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
After the LO Power level has been reached, a
short (T < TSELECT) or a long (T > TSELECT)
actuation will switch the load off. The power
level will slew from the LO to MIN power level at
SOFF, and once it reaches MIN, immediately fall
to zero. If the load is at the MED or HI level,
TLIMIT must pass before the load can be switched
off by an actuation. Once again, the power level
will slew to the MIN Power level at SOFF, and
once it reaches MIN, immediately fall to zero.
IQS117 Datasheet v2.03
Page 28 of 50
February 2008
IQ Switch® ProxSense™
8.2.2 Single Mode
Figure 8-4: Single Mode state diagram
Single Mode is very much like Mode Stepping,
except that no MED or LO Power levels are
available. A short actuation from OFF or FITD
Mode will result in the load switching on in HI
Power. From this state, a short actuation will
switch the load off.
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
From any state, a long actuation will result in
Continuous Dimming Mode, starting at the
currently active load power level.
IQS117 Datasheet v2.03
Page 29 of 50
February 2008
IQ Switch® ProxSense™
Figure 8-5: Single Mode timing diagram
Figure 8-5 illustrates Single Mode.
A short switch/touch actuation (T < TSELECT) 1,
causes the load to switch on at HI Power level.
Should another short actuation be performed,
the load will switch off. Actuation 2 is received
after TLIMIT has elapsed. After TSELECT, a short
flash (for TFLASH) indicates to the user that
Continuous Dimming is now active. During
actuation 2, the load is dimmed to a userselected Power level.
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
A long actuation (3) is performed after another
unspecified time. A short actuation will switch
the load off. Actuation 3 dims the load to the
MIN level, with a short flash (TFLASH) indicating to
the user that the minimum Power level has been
reached, and then continues dimming in the
positive direction (power to the load increases).
When released, the load stays on at this userselected power level.
IQS117 Datasheet v2.03
Page 30 of 50
February 2008
IQ Switch® ProxSense™
8.2.3 Memory Mode
Proximity
Detected
Long Press
before TLATCH
Short Press
before TLATCH
FITD Mode
Proximity
Detected
LOAD ON
MEMORY
LEVEL
After
TLATCH
Long
Press
Short
Press
START FROM
MEMORY
LEVEL
LOAD OFF
Short
Press
START
FROM
MIN
2nd Short
Press after
TLIMIT
LOAD ON
HI POWER
2nd Short
Press before
TLIMIT
Continuous
Dimming
Continuous Dimming
for as long as
the actuation
occurs
START
FROM HI
Long Press
Long Press
START
FROM
MIN
Long Press
Short
Press
MEMORY
LEVEL
STORED
Figure 8-6: Memory Mode state diagram
The Memory Mode algorithm allows the user to
select a dimming level from memory.
A short actuation from the OFF or FITD
condition will result in the load switching on at
the last power level the user selected using the
Continuous Dimming Mode (the default memory
value is the MIN Power level).
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
From any state, a long actuation will result in
Continuous Dimming Mode, starting at the
currently active load power level.
From the OFF or FITD condition, two short
actuations within TLIMIT of each other will result in
the load switching on at the HI power level.
IQS117 Datasheet v2.03
Page 31 of 50
February 2008
IQ Switch® ProxSense™
Figure 8-7: Memory Mode timing diagram 1
Figure 8-7 illustrates the basic process of
Continuous Dimming to a Memory Power level.
Note that a short actuation switches the load on
at the previously stored memory power level. To
dim the load to the HI Power level and down
again, Continuous Dimming is employed with a
long actuation (2). With actuation 3 the load is
dimmed to a user selected level and stored in
memory.
Figure 8-8 illustrates how, with two actuations (1
& 2) within TLIMIT, the load can be stepped to the
HI Power level. With actuation 3 and 4 the load
is again dimmed to a user selected level and
stored in memory.
Figure 8-8: Memory Mode timing diagram 2
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 32 of 50
February 2008
IQ Switch® ProxSense™
8.2.4 Hard on/off mode
This user interface is useful for applications
where a simple ON/OFF switch is required.
Every actuation will toggle the load ON/OFF with
no slewing between the two power levels. This
interface is conceptually the same as a
conventional electromechanical switch.
Figure 4.12 illustrates how power is transferred
to the load in reaction to user actuations in Hard
On/Off mode. It does not matter whether the
actuation is short or long, or whether TLIMIT has
passed or not, the load can only be switched
hard on or off.
Proximity
Detected
Proximity
Detected
Short/Long
Press
Load OFF
Short Press
Load ON
HI Power
Long Press
After
TLATCH
FITD Mode
Long Press
START
FROM
MIN
Short Press
Figure 4.11 – Hard On/Off state diagram
Figure 4.12 – Hard On/Off
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 33 of 50
February 2008
IQ Switch® ProxSense™
8.2.5 Momentary Output
This user interface is well suited to be interfaced
with a microcontroller, but can still be used as a
stand-alone device.
In order to use the IQS1171xx 41 with a
microcontroller, it is recommended that the
device is used in DC mode.
The device gives the true output of proximity and
touch detection. This means that when a
proximity is detected, the output of the LED pin
will be HIGH for as long as the proximity is
detected. When a touch is detected, the output
of the TG pin will be HIGH for as long as the
touch condition is detected.
*Please note: To provide the user with feedback
when the IQS1171xx 41 is used as standalone
device, the LED output will flash as described in
section 8.1.1. This flashing indicates when a
touch condition occurs. There are two solutions
to prevent this flashing on the LED pin from
interfering with a microcontroller interface.
With the IQS1171xx 41 in AC mode, the
following applies:
• While touch is detected, the output of
the TG pin is shown in Figure 6-7 with Θ
at the maximum angle.
• While a proximity is detected, the output
of the LED pin will be same as shown in
Figure 5-4.*
Firstly, the microcontroller can use a debounce
With the IQS1171xx 41 in DC mode, the
following applies:
• While touch is detected, the output of
the TG pin always high.
• While a proximity is detected, the output
of the LED pin is always high.*
time of
1
2. f LED _ FLASH
when reading the LED
pin.
Alternatively, the circuit shown in Figure 8-9 can
be used. It will ensure that the output to the
microcontroller will not drop more that 1V during
the LED pin flashing. However, this circuit will
add a 1.5s delay to the microcontroller output
voltage before it reaches zero after the proximity
condition has ceased.
IQS117
LED
470nF
1M
OUTPUT TO
MICROCONTROLLER
VSS
GND
Figure 8-9: Edge Detection circuit to bypass LED pin flash
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 34 of 50
February 2008
IQ Switch® ProxSense™
8.3
User Interface Enhancements
8.3.1 Continuous Dimming Mode
This feature is the touch- and hold dimming
technique that allows the user to select a custom
dimming level. The Memory, Mode Stepping and
Single Mode algorithms employ this method of
dimming.
The mode is enabled by actuations longer than
TSELECT. The mode uses a gradual in- or
decrease in power to the load, from the lowest to
the highest and from the highest down to the
lowest. This will repeat for as long as the
actuation occurs. The power level is set at the
value that was reached when the actuation is
stopped.
Referring to Figure 8-10, a long touch/switch
actuation (T > TSELECT) from OFF results in the
load starting up at the MIN Power level. A short
flash of TFLASH on the load after TSELECT will
indicate to the user that the unit is now in
Continuous Dimming Mode. After TCONST, the
load will slew at a slope of SAB to a power level
of A1 (approximately 71.3% power transferred to
the load). At reaching A1, the load will slew at an
increased slope of SAA to reach the HI Power
level. Upon reaching HI, the load will give a
short flash for TFLASH to indicate to the user that
the maximum power level has been reached.
Figure 8-10: Continuous Dimming to the HI Power level
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 35 of 50
February 2008
IQ Switch® ProxSense™
Figure 8-11: Continuous Dimming to the HI and then LO Power levels
Figure 8-11 shows what will happen if the
actuation is held for a very long time. After the
HI Power level has been reached, the load stays
at this level for TCONST, and then slews at a slope
of SAA until the A1 Power level has been
reached. Hereafter, the load will slew at a
diminished rate of SAB until MIN Power level has
been reached. Once MIN Power level has been
reached, the load will flash for TFLASH and stay at
this level for TCONST. The process continues
indefinitely, until the actuation stops.
It is possible to adjust the power level to any
user defined setting between MIN Power and HI
Power by halting the actuation at any time. This
process is illustrated in Figure 8-12. During
actuation 1 (a long actuation), the load is
dimmed to a User Power level. A period of
longer than TLIMIT passes, and another long
actuation (2) is performed by the user. The load
is now dimmed from the previously dimmed level
to the HI Power level. A short time (less than
TLIMIT) passes, and a short actuation 3 is
performed. The load switches off. A short time
(less than TLIMIT) again passes, and a long
actuation (4) occurs. The load is again dimmed
to a User Power level. A long time (longer than
TLIMIT) passes. Once again, a short actuation (5)
has the effect of switching the load off.
Figure 8-12: Continuous Dimming to user-selected levels
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 36 of 50
February 2008
IQ Switch® ProxSense™
8.3.2 CFL Mode
If the device detects that CFL mode is chosen
by the user, the triac is fired at 90 degrees,
overriding the user selected level. This ensures
proper operation of the CFL.
Figure 8-14 illustrates how power is transferred
to the load in reaction to user actuations in CFL
mode. As with Hard On/Off mode, it does not
matter whether the actuation is short or long, or
whether TLIMIT has passed or not, the load can
only be switched hard on or off. Dimming is not
possible in CFL mode.
Figure 8-13: CFL mode state diagram
Figure 8-14: CFL mode timing diagram
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 37 of 50
February 2008
IQ Switch® ProxSense™
8.3.3 Rheostat dimming
Should the designer choose to use a rheostat as
the method of dimming the load, a rheostat is
connected to the device to enable rheostat
dimming. In Rheostat mode the push button or
touch interface is only used to switch the load on
and off.
When an ON actuation is received, the load is
switched on at the current level of the rheostat.
The rheostat is continuously sampled and the
load adjusted accordingly.
A touch/switch
actuation only switches the load ON or OFF,
while the rheostat is used to dim the load.
Figure 8-16 illustrates this process. After
actuation 3, the rheostat is varied to select a
different dimming level.
Figure 8-15: Rheostat Dimming mode state
diagram
SW
1
1
2
3
0
Power
Level
Rheostat
Level
HI
Rheostat
Level
Rheostat
Level
Rheostat
Level
MIN
Rheostat Dimming
0
Figure 8-16: Rheostat Dimming mode
8.3.4 Auto-off with AAOW
Auto-off is an operational mode that switches
the load OFF after a pre-determined time, TAUTOOFF, if no actuations was made in this period.
Table 8-3- TAUTO-OFF Values
Power Level
TAUTO-OFF
HI Power level
4h
MED Power level
4h
LO Power level
1h
Continuous Dimming mode
1h
AAOW is a sequence of flashes on the load that
warns the user that Auto-off is imminent, i.e. the
load will switch off shortly (within ± 1½ min).
Depending on the current power level, the load
will dim to approximately half the power level for
a 30 second period. A flash is issued and
another 30 second period follows; and another,
where after the load will fade off. See Figure
8-17 for an explanatory drawing. If a button
press, touch or proximity is detected at any of
the inputs within this AAOW sequence, the
timers will reset, and the power level will return
to the initial level before the sequence started.
When the Auto-off time (TAUTO-OFF) expires, the
IC will enter an auto-off sequence (referred to as
Advanced Auto-Off Warning, or AAOW).
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 38 of 50
February 2008
IQ Switch® ProxSense™
Figure 8-17: AAOW Timing
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 39 of 50
February 2008
IQ Switch® ProxSense™
8.4
Typical Applications
8.4.2 Wall Switch
Table 8-1 and Table 8-2 lists the typical
applications that ICs in the IQS117 family can be
used for. In no way does this mean that the IC is
limited to this application – it is only meant to
illustrate what the specific combination of
features would be well suited for. It is envisioned
that new and previously unknown applications
will surface for use in many of the options. The
typical applications are discussed below as a
way to illustrate what the possibilities are.
8.4.1 Desk Lamp
The desk lamp environment would likely be a
small lamp located on a desk or bedside table.
An LED may be located near the switch to
indicate its position in a dark environment. In the
typical desk lamp application, the main light,
together with a backlight LED, is employed as
the FITD indication.
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
The wall switch environment can be described
as a switch located on a wall inside a room. In
the typical wall switch application, the main light
is not employed as FITD indication. Only the
backlight LED is used for this purpose, so that a
whole room will not light up when a proximity is
detected.
8.4.3 Appliance Control
When the IQS117 is used to switch on a device
that can not be dimmed, this type of application
will be used. The user will also be able to see a
backlight light up when coming into proximity to
the appliance, should the backlighting LED be
used.
IQS117 Datasheet v2.03
Page 40 of 50
February 2008
IQ Switch® ProxSense™
9
Schematics
150k
RHIGH
D8
6k2
10k
C30
400V
RV1
C25
D1
3
Q4
G
10K
A1
+
50V
47uF
+
R62
R65
100nF
2
R25
C61
C62
50V
1uF
100nF
1
100k
A2
2
3
C60
D6
33V
R61
R66
1
R64
100k
Q3
820k
1
R60
R30
Q5
100
47k
2
100k
D5
3
R71
L1
R63
GND
R13
510k
C10
1M
R12
510k
GND
1M
R39
100nF
R11
GND
IQS117
1
2
3
4
5
6
7
8
9
10
GND
R15
GND
3
CFL LOAD
ENABLE/DISABLE
1
10k
1M
R10
TEST
ZC
VSW
TG
LED
VSS
VDD
HVSENSE
SHNT
VDDHI
OSC
REOCNTR
REOIN
SW
NC
CS
CX
NC
TRPSEL
PWRCNTR
20
19
18
17
16
15
14
13
12
11
2
S
1 G
Q2
D
3
RHEO
CS
C3
100nF
C15
100pF
1M
2
R16
GND
GND
SENSE_PLATE
10k
2
D2
GND
R7
BAV99
ROSC
RX
22k
4k7
1
RLED
C7
10uF
3
GND
GND
LED
GND
Figure 9-1: 220Vac 2 Wire leading-edge dimmer example schematic. Rheostat Used. High Touch
Sensitivity setting. TRPSEL left floating. No Switch used. Extra ESD protection
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 41 of 50
February 2008
IQ Switch® ProxSense™
300k
RHIGH
R66
100k
R64
820k
Q3
2
3
Q5
100
1
3
R60
1
100k
2
R71
LIVE
C60
+
50V
4.7uF
+
R62
D
S
R65
Q4
C61
C62
50V
1uF
100nF
1
G 1
2
R63
C25
3
100k
Q1
GND
R25
2
R26
3
47k
10k
6k2
D6
33V
R61
C26
LOAD(+)
GND
GND
IQS117
510k
510k
R14
R11
1M
1
2
3
4
5
6
7
8
9
10
1k
C10
1nF
GND
GND
GND
TEST
ZC
VSW
TG
LED
VSS
VDD
HVSENSE
SHNT
VDDHI
OSC
REOCNTR
REOIN
SW
NC
CS
CX
NC
TRPSEL
PWRCNTR
20
19
18
17
16
15
14
13
12
11
10k
R13
1M
R10
R12
GND
CS
C3
R39
100nF
GND
22k
SENSE_PLATE
D2
10k
2
R15
ROSC
1M
GND
R7
BAV99
GND
RX
10uF
3
4k7
C7
1
RLED
LED
GND
GND
Figure 9-2 :220Vac 2 Wire trailing-edge dimmer example schematic. No rheostat. High Touch
Sensitivity setting. TRPSEL left floating. No Switch used. Extra ESD protection
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 42 of 50
February 2008
IQ Switch® ProxSense™
R50
1k2
D3
D4
C40
+
C41
20V
100uF
6V2
100nF
3
D
Q1
G 1
S
R20
10K
2
10k
GND
LED
GND
OSC
REOCNTR
REOIN
SW
NC
CS
CX
NC
TRPSEL
PWRCNTR
20
19
18
17
16
15
14
13
12
11
C3
R37
CS
RX
100nF
4k7
RLED
TEST
ZC
VSW
TG
LED
VSS
VDD
HVSENSE
SHNT
VDDHI
GND
GND
R36
10k
GND
SENSE_PLATE
Figure 9-3: 12Vdc 3 Wire example schematic. No rheostat. TRPSEL pulled high. High Touch
Sensitivity setting. No switch used.
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
10k
IQS117
1
2
3
4
5
6
7
8
9
10
200R
GND
R39
10k
R11
22k
ROSC
GND
Page 43 of 50
February 2008
IQ Switch® ProxSense™
10
Device Specifications
10.1 Absolute Maximum Specifications
Operating Temperature
Storage Temperature
Pin Voltage
LED pin Maximum Instantaneous Source Current (ILED_INST_MAX) (at VDDHI = 6V)
Minimum Turn On Slope
Maximum Shunt Current (ISHNT_MAX)
ESD Protection (SW, CX, VSS, VDDHI)
ESD Protection (TEST, ZC, VSW, TG, LED, VDD, HVSENSE, SHNT, OSC,
REOCNTR, REOIN, CS, TRPSEL, PWRCNTR)
-30 - +100°C
-30 - +100°C
6.5V
25mA
1V/s
10mA
8kV
2kV
Exceeding these maximum specifications may cause damage to the device.
10.2 Operating Conditions
DESCRIPTION
Internal Regulator Output
Supply Voltage
Start-up current
Operating current
HVSENSE comparator voltage
Digital Input Low Voltage
Digital Input High Voltage
Shunt/Serial VDDHI Regulating Voltage
CS trip voltage
TG Pin HIGH Voltage
LED Pin HIGH Voltage
Power-On-Reset Voltage
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
Table 10-1
PARAMETER
MIN
VDD
3.0
VDDHI
4.5
ISTARTUP
IIQS117
820
VHVSENSE
1.0
VINPUT LOW
VINPUT HIGH
0.70VDD
VDDHI
5.7
VTRIP
700
VTG_HIGH
VLED_HIGH
VDDHI
IQS117 Datasheet v2.03
TYP
3.37
2
930
1.2
6.15
830
VDDHI – 0.06
VDDHI – 0.06
1.5
MAX
3.6
6.5
1030
1.3
0.15VDD
6.5
900
UNIT
V
V
mA
µA
V
V
V
V
mV
V
V
V
Page 44 of 50
February 2008
IQ Switch® ProxSense™
10.3 Timing Characteristics
DESCRIPTION
(Table 10-2)
SYMBOL
HI Power
Θ
MED Power
Θ
LO Power
Θ
MIN Power
Θ
CFL Mode
IQS1170C0
153.9
142.2
89.1
97.2
64.8
63.0
34.2
34.2
60.3
61.9
90
35
42
17.5
21
70
84
140
168
5
4.16
UNIT
deg
deg
deg
deg
deg
deg
deg
deg
deg
deg
deg
deg/s
deg/s
deg/s
deg/s
deg/s
deg/s
deg/s
deg/s
s
s
CONDITON
AC Supply, Note 1
AC Supply, Note 2
AC Supply, Note 1
AC Supply, Note 2
AC Supply, Note 1
AC Supply, Note 2
AC Supply, Note 3
AC Supply, Note 4
AC Supply, Note 5
AC Supply, Note 6
AC Supply, Note 1
50Hz
60Hz
50Hz
60Hz
50Hz
60Hz
50Hz
60Hz
50Hz
60Hz
2.2
s
50Hz
1.83
s
60Hz
550
458
800
666
40
33
30
25
2
1.66
60
588
800
909
900
350
1700
1250
ms
ms
ms
ms
ms
ms
s
s
s
s
ms
µs
µs
µs
µs
µs
µs
µs
50Hz
60Hz
50Hz
60Hz
50Hz
60Hz
50Hz
60Hz
50Hz
60Hz
Fast Slope
SAA
Slow Slope
SAB
Off Slope
SOFF
On Slope
SON
FITD Latch Time
TLATCH
Time between
successive actuations
TLIMIT
Mode HI/ Continuous
Dimming
TSELECT
Constant Power level
TCONST
User Feedback
TFLASH
Halt environment
adjusting
THALT
Proximity Ignore Time
TPROXIGNR
SW De-bounce
TSW
PWRCNTR and LED
pulse
TBOOST
Zero Cross Debounce
TZCDB
Charge Delay time
after Zero Cross
TCHARGE
LED Flash frequency
fLED_FLASH
16
Hz
TG PWM Frequency
fPWM
130
Hz
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Min
Typ
Max
12 Vac
220 Vac
12 Vac
220 Vac
DC Mode
Page 45 of 50
February 2008
IQ Switch® ProxSense™
10.4 Defined Power Levels (For Resistive Loads)
AC Power Levels
HI Power
MED Power
LO Power
MIN Power
DC Power Levels
HI Power
MED Power
LO Power
MIN Power
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Table 10-3
% Power Transferred to Load
IQS1170C0
98.1
93.6
49.0
57.2
23.7
34.1
4.2
15.5
19.8
34.1
Table 10-4
% Power Transferred to Load
IQS1170C0
89.4
51.3
36.8
21.0
36.8
CONDITON
Note 1
Note 2
Note 1
Note 2
Note 1
Note 2
Note 3
Note 4
Note 5
Note 6
CONDITON
Note 3
Note 5
IQS1170xx00 – IQS1170xx15
IQS1171xx30 – IQS1171xx45
IQS1170xx01, IQS1170xx05, IQS1170xx07, IQS1170xx09, IQS1170xx13, IQS1170xx14, IQS1170xx15
IQS1171xx31, IQS1171xx35, IQS1171xx37, IQS1171xx39, IQS1171xx43, IQS1171xx44, IQS1171xx45
IQS1170xx00, IQS1170xx02, IQS1170xx04, IQS1170xx06, IQS1170xx08, IQS1170xx10, IQS1170xx11, IQS1170xx12
IQS1171xx30, IQS1171xx32, IQS1171xx34, IQS1171xx36, IQS1171xx38, IQS1171xx40, IQS1171xx41, IQS1171xx42
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 46 of 50
February 2008
IQ Switch® ProxSense™
10.5 Device Designator
CONFIGURATION MODE
(Table 8-1 and Table 8-2)
00
05
09
13
31
36
40
44
REVISION
0
1
=
=
Leading-edge
Trailing-edge
TEMPERATURE RANGE
C
=
0°C to 70°C (Commercial)
PACKAGE
SS
=
SSOP (Small Outline Package)
01
06
10
14
32
37
41
45
02
07
11
15
34
38
42
04
08
12
30
35
39
43
Example:
IQS1170C005CSS = Leading-edge; User Interface Option 5; Commercial Temperature
Range; SSOP Package
Note:
The device name for the IQS117 engineering samples is IQS117ENG
The device name for the IQS117 pre-production samples is IQS117PPS
Some devices may still obtain the previous name: IQS17
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 47 of 50
February 2008
IQ Switch® ProxSense™
10.6 Packaging Information
20 Pin SSOP Packaging
Dimension
A
B
C
D
E
F
G
H
I
J
K
L
M
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
Min
Max
7.60 mm
8.00 mm
6.2 mm typ
5.20 mm
5.40 mm
7.05 mm
7.25 mm
0.3 mm typ
0.65 mm typ
1.43 mm
1.63 mm
0.10 mm
0.20 mm
1.25 mm typ
1.09 mm typ
0.80 mm
0.95 mm
4° typ
0.5 mm typ
IQS117 Datasheet v2.03
Page 48 of 50
February 2008
IQ Switch® ProxSense™
Datasheet Revision History
Version 1.10
This is a new document containing the production silicon parameters
Version 1.11
•
•
•
•
•
•
Device Designator Example Corrected
Updated TZCDB in Table 10-2
Fixed reference to D4 in section 5.4
Updated Data in Table 10-1
Updated section 7.2
Updated TBOOST in Table 10-2
Version 1.12
•
•
•
•
•
Fixed D8 in Figure 5-5
Updated Chapter 4
Updated Table 8-1
Added Digital Input Voltages to Table 10-1
Updated section 6.3.2
Version 2.00
•
Updated the document to include information on the trailing-edge devices (IQS1171xx 30 –
IQS1171xx 45)
Version 2.01
•
Fixed Heading 5.6
Version 2.02
•
•
•
•
•
•
Updated Table 10-2, Table 10-3, Table 10-4, Table 8-1 and Table 8-2
Updated Section 4.3.2
Updated Chapter 6
Updated Section 8.1.2
Updated Section 8.2.5
Updated Section 10.5
Version 2.03
•
Replaced IQS17 with IQS117
PRETORIA OFFICE
Physical Address
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
160 Witch Hazel Avenue
st
Hazel Court 1, 1 Floor
IQS117 Datasheet v2.03
Page 49 of 50
February 2008
IQ Switch® ProxSense™
Highveld Techno Park
Centurion, Gauteng
Republic of South Africa
Tel:
Fax:
Postal Address
PO Box 16767
Lyttelton
0140
Republic of South Africa
+27 12 665 2880
+27 12 665 2883
PAARL OFFICE
Physical Address
109 Main Street
Paarl
7646
Western Cape
Republic of South Africa
Tel:
Fax:
Postal Address
PO Box 3534
Paarl
7620
Republic of South Africa
+27 21 863 0033
+27 21 863 1512
WWW.AZOTEQ.COM
[email protected]
The following patents relate to the device or usage of the device: US 6,249,089 B1, US 6,621,225 B2,
US 6,650,066 B2, US 6,952,084 B2, US 6,984,900 B1, US 7,084,526 B2, US 7,084,531 B2, EP 1 120
018 B1, EP 1 206 168 B1, EP 1 308 913 B1, EP 1 530 178 B1, HK 104 1401A, ZL 99 8 14357.X, AUS
761094
IQ Switch, ProxSense and the IQ logo are trademarks of Azoteq
The information appearing in this Data Sheet is believed to be accurate at the time of publication.
However, Azoteq assumes no responsibility arising from the use of the specifications described. The
applications mentioned herein are used solely for the purpose of illustration and Azoteq makes no
warranty or representation that such applications will be suitable without further modification, nor
recommends the use of its products for application that may present a risk to human life due to
malfunction or otherwise. Azoteq products are not authorized for use as critical components in life support
devices or systems. No licenses to patents are granted, implicitly or otherwise, under any intellectual
property rights. Azoteq reserves the right to alter its products without prior notification. For the most up-todate information, please contact [email protected] or refer to the website.
Copyright © Azoteq (Pty) Ltd 2007.
All Rights Reserved.
IQS117 Datasheet v2.03
Page 50 of 50
February 2008