Download 4-channel BTL driver for CD players and CD-ROM

BA5918FP-Y
Optical disc ICs
4-channel BTL driver for CD players and CD-ROM
BA5918FP-Y
The BA5918FP-Y is an IC included actuator for CD players and CD-ROM, 4ch BTL driver for motor drive and general
purpose operational amplifiers. HSOP25pin package is comprised in the IC, so it enables much smaller configuration.
zApplications
CD players, CD-ROM, other related optical discs
zFeatures
1) Available in a HSOP25 package.
2) Wide dynamic range. (3.6V typically at VCC=5V, RL =8Ω)
3) Built-in thermal shutdown circuit.
4) Gain of driver output can be changed by changing a single external resistor.(CH2, CH3)
5) Includes general purpose operational amplifier with wide dynamic range.
6) A stand-by terminal enables a power-saving mode.
zAbsolute maximum ratings (Ta=25°C)
Parameter
Supply voltage
Symbol
Limits
Unit
VCC
7
V
Power dissipation
PD
1.45 ∗
W
Operating temperature
Topr
−35 to +85
°C
Storage temperature
Tstg
−55 to +150
°C
∗ On less than 3% (percentage occupied by copper foil), 70 x 70mm , t =1.6mm, glass epoxy mounting.
Reduce power by 11.6mW for each degree above 25°C.
2
zRecommended operating conditions (Ta=25°C)
Parameter
Symbol
Limits
Unit
Supply voltage
VCC
4.3 to 6.6
V
1/6
BA5918FP-Y
Optical disc ICs
zBlock diagram
22
21
20
19
18
17
16
VCC
10k
+
10k
10k
LEVEL
SHIFT
+
−
−
+
−
10k
10k
10k
−
14
10k
10k
+
−
10k
+
10k
15
10k
−
23
+
24
−
25
10k
LEVEL
SHIFT
+
+
−
LEVEL
SHIFT
10k
LEVEL
SHIFT
+
−
10k
10k
10k
1
2
3
4
5
6
7
8
9
10
10k
11
12
+
10k
−
+
−
10k
10k
+
VCC
10k
−
10k
+
STBY
VCC
−
10k
10k
13
zPin description
Pin No.
Symbol
1
VCC
2
BIAS IN
3
4
Description
Pin No.
Symbol
Description
VCC
14
VO4 (+)
Driver CH4 noninvrted output
Bias amplifier input
15
VO4 (−)
Driver CH4 inverted output
VIN1
Driver CH1 input
16
VO3 (+)
Driver CH3 noninvrted output
Driver CH2 input, gain
Adjustment pin
17
VO3 (−)
Driver CH3 inverted output
VIN2’
18
VCC
VCC
Substrate Ground
5
VIN2
Driver CH2 input
19
GND
6
GND
Substrate Ground
20
OP IN (+)
Op-amp input, positive
7
GND
Substrate Ground
21
OP IN (−)
Op-amp input, negative
8
STBY
Input for stand-by control
22
OP OUT
Op-amp output
9
VCC
Vcc
23
VIN3
Driver CH3 input
10
VO2 (−)
24
VIN3'
25
VIN4
Driver CH2 inverted output
11
VO2 (+)
Driver CH2 noninverted output
12
VO1 (−)
Driver CH1 inverted output
13
VO1 (+)
Driver CH1 noninverted output
Driver CH3 input,gain
adjustment pin
Driver CH4 input
∗Symbol of + and − (output of DRIVERS) means polarity to input pin. (For example if voltage of pin3 is high, pin13 is high.)
2/6
BA5918FP-Y
Optical disc ICs
zElectrical characteristics (Unless otherwise noted, Ta=25°C , VCC=5V , BIAS=2.5V , RL=8Ω)
Parameter
Limit
Symbol
Unit
Min.
Typ.
Max.
Condition
Stand-by quiescent current
IST
−
−
200
µA
Quiescent current
ICC
−
15
22
mA
Output voltage offset
VOO
−40
−
40
mV
Output amplitude
VOM
3.1
3.6
−
V
Gain (close circuit)
GVC
10.4
11.8
13.2
dB
Stand-by on voltage
VSTBY
−
−
0.5
V
Stand-by off voltage
VSTOFF
2.0
−
−
V
VOFOP
−6
0
6
mV
IBOP
−
−
300
nA
High level output voltage
VOHOP
4.6
4.8
−
V
Low level output voltage
VOLOP
−
0.2
0.4
V
ISINK
10
30
−
mA
50Ω, at VCC
ISOURCE
2
−
−
mA
50Ω, at ground
SROP
−
−
V/us
100kHz square wave, 2VP-P
No load
VIN=0.1Vrms, f=1kHz
(Operating amplifier)
Offset voltage
Input bias current
Output drive current (sink)
Output drive current (source)
Slew rate
1
∗This product is not designed for protection against radioactive rays.
3/6
4
10k
5
+
−
6
10k
10k
20
8
9
10k
10k
10k
VCC
VCC
18
17
LEVEL
SHIFT
10
10k
15
10k 10k
16
LEVEL
SHIFT
+
−
STBY
7
STBY
19
10k
10k
10k
10k
11
LEVEL
SHIFT
LEVEL
SHIFT
12
10k 10k
−
+
TRACKING
3
10k
21
+
−
FOCUS
2
10k
+
−
10k
22
+
−
10k
14
10k
10k
13
10k
−
+
1
10k
23
+
−
BIAS
10k
24
SPINDLE
MOTOR
+
−
0.1µF
+
−
VCC=5V
+
−
VCC
25
+
−
SLED
SLED
MOTOR
+
−
SPINDLE
BA5918FP-Y
Optical disc ICs
zApplication circuit
FOCUS
COIL
TRACKING
COIL
ON-LOW
OFF-HIGH
SERVO PRE AMP
Unit for resistance value : (Ω)
Fig.1
4/6
BA5918FP-Y
Optical disc ICs
zOperation notes
(1) A thermal shutdown circuit is built into the BA5918FP-Y.
When the temperature of the chip reaches 175°C (typically), the output current is muted.
The thermal shutdown switch resets when the temperature falls below 150°C (typically).
(2) If stand-by-pin voltage (pin8) is open or less than 0.5V, quiescent current is muted.
Under normal operating conditions, make sure to pull pin8 above 2.0V.
(3) If the bias pin (pin2) drops below 0.85V, output current is muted.
Make sure that under normal operating conditions, this pin is at 1.2V or above.
(4) The output current is muted in the event of a thermal shut down or a bias voltage drop.
Other sections are not muted.
When muted, the internal bias voltage of the output pin becomes roughly (VCC-VF) /2.
(5) Make sure to connect a 0.1µF capacitor to the dc supplied power main input to filter out voltage ripples.
(6) Heat dissipation fins are attached to the GND on the inside of the package.
Make sure to connect these to the external GND.
3
2
1
0
0
25
50
75
100
125
25
10
5
0
−5
−10
−15
3
4
5
6
7
RL=∞
20Ω
12Ω
16Ω
3
4Ω
2
8Ω
1
0
−1
−2
−3
−5
−2
8
POWER SUPPLY VOLTAGE : VCC (V)
Fig.2 Thermal dissipation curve
Fig.3 Power supply voltage
vs. output offset voltage
−1
0
1
2
INPUT VOLTAGE : VIN (V)
Fig.4 Driver input / output characteristics
100
VOH
180
80
6
5
40
room
temperature
4
3
VOH
2
VOL
+
−
−80
VOL
1
2
3
4
θ
5
6
−90
−60
1
0
90
0
0
−20
−40
VOOP
0
g
20
PHASE : q (deg)
60
GAIN : g (dB)
OUTPUT VOLTAGE : VOOP (V)
VCC=5V
VBIAS=2.5V
−4
−20
AMBIENT TEMPERATURE : Ta (°C)
7
4
15
−25
150
5
VIN=VBIAS=2.5V
RL=8Ω
20
OUTPUT VOLTAGE : VO (V)
Glass epoxy mounting
(70mm×70mm, t=1.6mm)
on less than 3%
(occupied by copper foil).
OUTPUT OFFSET VOLTAGE : VOFF (mV)
POWER DISSIPATION : Pd (W)
zElectrical characteristics curves
7
POWER SUPPLY VOLTAGE : VCC (V)
Fig.5 Power supply voltage
vs. op-amplifier "H" and "L"level output voltage
−100
−180
1k
3k 6k 10k
30k 60k100k 300k600k1M
3M 6M10M
FREQUENCY : f (Hz)
Fig.6 Op-amplifier open loop characteristics
5/6
BA5918FP-Y
Optical disc ICs
zExternal dimensions (Unit : mm)
13.6±0.2
14
1
13
1.95±0.1
0.8
0.36±0.1
0.25±0.1
5.4±0.2
0.11
1.9±0.1
7.8±0.3
2.75±0.1
25
0.3Min.
0.15
HSOP25
6/6
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.1