Download Non-isolated Constant Current Linear LED Driver BL8312

CE1001 Series
CMOS High Sensitivity Micropower Hall Switch
LESHAN RADIO COMPANY, LTD.
Non-isolated Constant Current Linear LED Driver
LR8312
FEATURES
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DESCRIPTIONS
Low standby current
No need inductor
±3% current accuracy
Thermal shutdown protection
Thermal compensation
Clamp internal voltage of 12V
SOT23-5 package
Accord the standard of RoHS, totally
nonlead and green
APPLICATIONS
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LED MR16 and general lighting
LED E17, E26, E27 lighting
LED lighting
The LR8312 is a Non-isolated constant
current linear LED driver for driving
dimmable LED string. The current flow the
LED string is charge by the RCS. By Using the
company's unique intelligent temperature
control technology ,the LR8312 can reduce
the LED current when the temperature rises to
100 ℃ and shutdown when the temperature
rises to 150 ℃ . LR8312 uses the SOT23-5
package and can be widely used in LED
lighting field.
PACKAGE
SOT23-5
PIN DESCRIPTIONS
Pin
Name
I/O
Description
1
GATE
O
External Powermos’ Driver
2
GND
3/4
VDD
I
Input Supply Voltage
5
CS
I
LED current setting
Ground
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CE1001 Series
CMOS High Sensitivity Micropower Hall Switch
LESHAN RADIO COMPANY, LTD.
TYPICAL APPLICATION CIRCUIT
PERIPHERAL DEVICES
No.
Parameter
Typ
unit
CIN
Select Pin Input Capacitance
2.2
uF
C1
LED Regulator Capacitor
10
uF
R1
Input Current Limiting Resistor
510
KΩ
RCS
Current Sample Resistor
500mV/ILED(mA)
Ω
SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM
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CMOS High Sensitivity Micropower Hall Switch
CE1001 Series
LESHAN RADIO COMPANY, LTD.
MAXIMUM RATINGS
Symbol
Rating
Value
Unit
VDD
Positive DC Supply Voltage
0 to 24
V
VCS
Sense voltage
0 to 5
V
VGATE
Output voltage of GATE
0 to 24
V
IIN
Maximum Input current
3
mA
LGATE
Peak Current from GATE to external MOS
±300
uA
Note :
* Power dissipation values are based on conditions: Operating junction temperature TJ and the difference between
ambient temperature TA 100 ℃.
*Stress beyond above listed “Absolute Maximum Ratings” may lead permanent damage to the device. These are
stress ratings only and operations of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications are not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
* Absolute Maximum Ratings are limits which damage to the device may occur. The maximum rating is just a
number, so that the device is not recommended work in this situation. the device work long hours in this situation
will affect the reliability of the period.
RECOMMENDED OPERATING CONDITIONS
Symbol
Rating
Min
Max
Unit
VDD
Positive DC Supply Voltage
10
16
V
VCS
Sense voltage
0.485
0.515
V
VGATE
Output voltage of GATE
0
16
V
IIN
Maximum Input current
500
uA
LGATE
Peak Current from GATE to external MOS
250
uA
100
ELECTRICAL CHARACTERISTICS
Symbol
Parameter
Test Conditions
VDD
Input Voltage
VIN Rising to 20V
IQ
Operating Current
VCS
CS Voltage
Gain
OP +POWERMOS Gain
Tr
GATE Rising Time
Tf
IGATE
TTST
TTSH
TTCT
See Fig1 VDD from 0V to
13
See Fig1 ,VIN=20V
See Fig2 ,VIN=20V,
TA = +25℃
Unit
Min
Typ
Max
10
12
16
V
50
500
uA
0.485
0.515
V
60
dB
See Fig4 ,VIN=20V
20
us
GATE Falling Time
See Fig3 ,VIN=20V
20
us
GATE Source Current
See Fig4 ,VIN=20V
150
uA
GATE
See Fig3 ,VIN=20V
150
uA
See Fig1 ,VIN=20V
150
℃
See Fig1 ,VIN=20V
50
℃
See Fig1 ,VIN=20V
100
℃
Sink Current
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis
Thermal Compensation
temperature
VCS_DC=0.5V
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CMOS High Sensitivity Micropower Hall Switch
CE1001 Series
LESHAN RADIO COMPANY, LTD.
TYPICAL PERFORMANCE CHARACTERISTICS
4/7
CE1001 Series
CMOS High Sensitivity Micropower Hall Switch
LESHAN RADIO COMPANY, LTD.
PACKAGE DESCRIPTIONS：SOT23-5
E1
0.2500
L1
b
L
C
D
E
L2
e
θ
e1
A2
A3
A
A1
Dimensions in millimeters
Symbols
Min
Typ
Max
A
1.00
1.10
1.40
A1
0.00
---
0.10
A2
1.00
1.10
1.30
A3
0.70
0.80
0.90
b
0.35
0.40
0.50
C
0.12
0.125
0.225
D
2.70
2.90
3.10
E1
1.40
1.60
1.80
e1
---
1.90(typ)
---
E
2.60
2.80
3.00
L
0.37
---
---
θ
1°
5°
9°
e
---
0.95(typ)
---
L1
---
0.60(typ)
---
L1-L2
---
---
0.12
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CE1001 Series
CMOS High Sensitivity Micropower Hall Switch
LESHAN RADIO COMPANY, LTD.
REFLOW SOLDERING CONDITIONS (I / R convection or VPR Reflow)
CLASSIFICATION REFLOW CONFIGURATION INFORMATIONS
Profile Feature
Average ramp-up rate（from TL to TP）
Lead / Green configuration
3℃/s max
Preheat
-Min temperature（TSmin）
150℃
-Max temperature（TSmax）
200℃
Time（from Min to Max）（tS）
60-180s
Holding time：
-Temperature （TL）
-Time(tL)
Peak / Classification temperature（TP）
Time of 5℃ peak temperature（tP）
217℃
60-180s
See table 1
20-40s
Ramp-down rate
3℃/s max
Time from 25℃ to peak temperature
8min max
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CE1001 Series
CMOS High Sensitivity Micropower Hall Switch
LESHAN RADIO COMPANY, LTD.
Lead / Green technology ---Package Classification Reflow Temperatures
Volume （mm3）
Volume （mm3）
Volume （mm3）
＜350
350-2000
≥2000
＜2.5mm
260+0℃*
260+0℃*
260+0℃*
1.6-2.5mm
260+0℃*
250+0℃*
245+0℃*
≥2.5mm
250+0℃*
245+0℃*
245+0℃*
Package Thickness
Note：
* Tolerance: The device manufacturer / supplier shall ensure the compatibility of the process, and the status
classification temperature should be at the MSL level (this means the peak reflow temperature +0 ℃, for example
260 +0 ℃)
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