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BD7961FM
Optical disc ICs
Power driver IC for CD changer
BD7961FM
BD7961FM is a 6-channel driver IC developed for CD changer. In addition to the 4-channel BTL driver and the 2-channel loading driver, the 3.3V regulator and 5.0V regulator used in the peripheral circuit are also incorporated. The size reduction of the set is achieved by integrating functions that were used in two chips into a single chip.
!Applications CD changer
!Features 1) This circuit is a 6-channel driver IC consisting of four BTL drivers and two loading drivers. 2) Two wide dynamic range loading drivers of MOS output (RON=1.0). 3) The circuit is provided with loading driver voltage setting terminals. 4) A 5.0V regulator and a 3.3V regulator are built in. (Each regulator has an external PNP transistor and an ON/OFF switch) 5) The circuit has a mute switch. 6) A thermal shutdown circuit is built in. 7) Since HSOP-M36 power package is used, the set requires a reduced space.
!Absolute maximum ratings (Ta=25C)
Parameter Supply voltage Power dissipation Operating temperature range Storage temperature range Symbol VCC Pd Topr Tstg Limits 15 2200 -35 to +85 -55 to +150 Unit V mW C C
Reduced by 17.6mW for each increase in Ta of 1C over 25C, on less than 3% (percentage occupied by copper foil), 70mmx70mm, t=1.6mm, glass epoxy mounting.
!Recommended operating conditions (Ta=25C)
Parameter Supply voltage 1 Supply voltage 2 Supply voltage 3 Symbol VCC1 VCC2 VCC3 Min. 4.5 4.5 6.0 Typ. 8.0 8.0 8.0 Max. 14.0 14.0 14.0 Unit V V V
When REG2 (5.0-V regulator) is not used, the supply voltage3 (VCC3) is 4.5 to 14.0V.
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BD7961FM
Optical disc ICs
!Block diagram
36
35
CH6
34
33
32
31
30
29
28 VCC2
27 GND3 (REG GND)
26 VCC3
25 VCC1
24
23
22
CH4
21
20
CH3
19
10k + -
10k + -
10k + -
10k + -
BIAS
MUTE (CH1~CH4)
+-
-+
(POW VCC CH5/6)
(PRE VCC (POW VCC CH1~4) REG VCC)
10k
10k
10k
10k
LD CONT1
LD CONT2 REG2 REG1
Level shift
Level shift
47k REG2 SW + - - + -+
47k -+
Level shift + -
Level shift + -
23.5k
47k -+ REG1 SW 23.5k
47k
(POW GND CH5/6) F GND2 1 2
CH5
+ -
+ -
+ -
R
R
F 23.5k 23.5k 12 13 GND1 14
CH2
CH1
3
4
5
6
7
8
9
10
11
15
16
17
!Pin descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Pin name GND2 OUT5- OUT5+ IN5FWD IN5REV IN6REV IN6FWD REG2SW REG1SW IN4 IN3 IN1 IN2 GND1 OUT2- OUT2+ OUT1- OUT1+ Function POW GND (loading driver unit) Loading driver (CH5) output - Loading driver (CH5) output + Loading driver (CH5) FWD input Loading driver (CH5) REV input Loading driver (CH6) REV input Loading driver (CH6) FWD input Regulator 2 switch terminal Regulator 1 switch terminal CH4 input CH3 input CH1 input CH2 input POW GND (BTL driver unit) BTL driver (CH2) output - BTL driver (CH2) output + BTL driver (CH1) output - BTL driver (CH1) output + Pin No. 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Pin name OUT3+ OUT3- OUT4+ OUT4- LDCONT2 LDCONT1 VCC1 VCC3 GND3 VCC2 REG1OUT REG1_B REG2_B REG2OUT MUTE OUT6+ OUT6- BIAS Function BTL driver (CH3) output + BTL driver (CH3) output - BTL driver (CH4) output + BTL driver (CH4) output - Loading driver (CH6) voltage setting terminal Loading driver (CH5) voltage setting terminal Supply voltage (BTL driver unit) Supply voltage (regulator unit) REG GND (regulator unit) Supply voltage (loading driver unit) Regulator 1 output Regulator 1 Tr base Regulator 2 Tr base Regulator 2 output BTL driver mute terminal Loading driver (CH6) output + Loading driver (CH6) output - BIAS terminal
+ -
18
-+
Control logic
Control logic
+
-
+
-
10k 10k 10k
10k 10k
10k 10k
10k
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BD7961FM
Optical disc ICs
!Input output circuit
IN1/IN2/IN3/IN4 OUT1+/OUT1-/OUT2+/OUT2- OUT3+/OUT3-/OUT4+/OUT4-
VCC1 VCC1
VCC1 10k 23.5k 10, 11 12, 13pin 10k
15~22pin
10k
10k
IN5FWD/IN5REV IN6FWD/IN6REV
VCC1 4, 5, 6, 7 pin
OUT5+/OUT5- OUT6+/OUT6-
VCC2
LDCONT1/LDCONT2
200k 2, 35pin 25k 3, 34pin 23, 24 pin
VCC1
40k
25k GND2
REG1OUT/REG2OUT
REG1_B/REG2_B
VCC3
VCC1
VCC1 20k (8.5k) 29, 32pin
BG
30k (24k)
30, 31pin
REG1SW/REG2SW
MUTE
BIAS
VCC1
VCC1
VCC1
8, 9pin 20k
33pin 50k
36pin 3k
50k 20k 50k 50k
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BD7961FM
Optical disc ICs
!Electrical characteristics (unless otherwise noted, Ta=25C, VCC1, VCC2, VCC3=8V, BIAS=2.5V, RL=8)
Parameter Quiescent current Quiescent current (BTL MUTE) BTL driver CH1 to CH4 Output offset voltage Max. output amplitude Closed circuit voltage gain Difference between positive and nagative voltage gains Loading driver CH5 and CH6 Output offset voltage Output saturation voltage H Output saturation voltage L Voltage gain Difference between positive and nagative voltage gains Regulator 1 Output voltage Output load stability Supply voltage stability REG1_B terminal sink current Regulator 2 Output voltage Output load stability Supply voltage stability RE2_B terminal sink current
The product is not designed for protection against radioactive rays.
Symbol
Min. 12 5 -70 5.4 16 -2.0 -35 - - 4.0 -2.0
Typ. 25 10
Max. 38 15 +70 - 20 2.0 +35 0.48 0.27 8.0 2.0
Unit mA mA
Conditions Under no load Under no load
ICC1 ICC2
VOFS VOM GVC GVC
0 6.0 18 0
mV V dB dB
VIN=BIAS0.5V
VOFSL VOLH VOLL GVLD GVLD
0 0.32 0.18 6.0 0
mV V V dB dB
When brake is applied IO=500mA IO=500mA LDCONT=1V
VREG1 VRL1 VVCC1 IREGSI1
3.135 5 5 2
3.300 10 10 -
3.465 20 20 -
V mV mV mA IO=0~200mA VCC=6~10V IO=100mA
VREG2 VRL2 VVCC2 IREGSI2
4.75 5 5 2
5.00 10 10 -
5.25 20 20 -
V mV mV mA IO=0~200mA VCC=7~10V IO=100mA
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BD7961FM
Optical disc ICs
!Measurement circuits
REGOUT REGOUT IREG IREG
3
2
1
SW2
1
SW2
2
3 47F LDCONT LDCONT
47F 2SB1182 2SB1182
OUT_LD (CH6)
OUT- OUT+
VCC3
VCC2
VCC1
OUT_A (CH4)
OUT- OUT+
VMUTE
OUT-
IQB
A
36
A
IMUTE 33 32
A
31
A
30 29
IQ3
A
28 27
IQ2
A
26
A
25
A
ILDC1 24
A
23
35
CH6
34
22
CH4
21
10k
20
CH3
19
10k
(REG GND) BIAS MUTE (CH1~CH4) +- -+ (POW VCC CH5/6) (PRE VCC (POW VCC REG VCC) CH1~4)
10k
LD CONT1
OUT+
VB
IQREG2
IQREG1
OUT_A (CH3)
IQ1
ILDC2
LD CONT2 REG2 REG1
Level shift
Level shift
47k REG2 SW + - - + -+
47k -+
Level shift + -
Level shift + -
23.5k
10k 10k 10k 10k
47k -+ REG1 SW 23.5k
47k
+ -
(POW GND CH5/6) F
CH5
+ -
+ -
R
R
F 23.5k 23.5k 12 13 14
CH2
CH1
1
2
OUT-
3
OUT+
4
5
6
7
8
9
10
11
15
OUT-
16
OUT+
17
OUT-
A
IQ5F
A
IQ5R
A
IQ6R
A
IQ6F
A
A
VIN VIN VIN VIN
IQREGSW2 IQREGSW1
(CH5) OUT_LD
(CH2) OUT_A
(CH1) OUT_A
LDINF LDINR
LDINR
LDINF REGSW REGSW
The resistance values are indicated in []
Fig.1
OUT_A
OUT+ OUT-
OUT_LD
FWD
+
V
VO
VOLD
V
RL RL=8
V
VOLF 2
REV
SW1 SW1
V
VOLR
1
1
2
Fig.2
IDF IDR
Fig.3
OUT+
+ -
-+
Control logic
Control logic
18
+
-
+
-
10k + - 10k 10k
10k + - 10k 10k 10k 10k
+ -
+ - 10k
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BD7961FM
Optical disc ICs
!Switch table for measuring circuit diagrams (unless otherwise noted, Ta=25C, VCC1, VCC2, VCC3=8V, BIAS=2.5V, RL=8 Unless otherwise specified, the switch 1 is used.)
Parameter Quiescent current Quiescent current (BTL MUTE) BTLdriver CH1 to CH4 Output offset voltage Max. output amplitude Closed circuit voltage gain(CH1 to CH4) Difference between positive and negative voltage gains (CH1 to CH4) Mute terminal sink current Bias terminal sink current Loading driver CH5 and CH6 Output offset voltage Output saturation voltage H Output saturation voltage L Voltage gain (Loading) Difference between positive and negative voltage gains (Loading) Input terminal sink current LDCONT terminal source current Regulator 1 Output voltage Output load stability Supply voltage stability REG1_B terminal sink current REG1SW terminal sink current Regulator 2 Output voltage Output load stability Supply voltage stability REG2_B terminal sink current REG2SW terminal sink current
1 LDINF=LDINR=0V, REGSW=0V, VMUTE=5V, ICC1=IQ1+IQ2+IQ3 2 LDINF=LDINR=0V, REGSW=0V, VMUTE=0V, ICC2=IQ1+IQ2+IQ3 3 LDINF=5V, LDINR=0V, IDF=500mA, VOLH=VCC-VOLF 4 LDINF=5V, LDINR=0V, LDCONT=1V, GVLD=20log (VOLD/LDCONT)
Symbol
SWITCH 1 2 1 2
Conditions
Measurement circuit Fig.1 Fig.1
ICC1 ICC2
VOFS VOM GVC GVC IMUTE IBIAS
VIN=VB, VOFS=VO VIN=VCC, VOM=VO VIN=VB0.5V, GVC=20log (VO/0.5)
Fig.2 Fig.2 Fig.2 Fig.2
VMUTE=5V, IMUTE=IMUTE VB=2.5V, IBIAS=IQB
Fig.1 Fig.1
VOFSL VOLH VOLL GVLD GVLD IINL ILDC
2 2
LDINF=LDINR=5V, VOFSL=VOLD 3 LDINF=5V, LDINR=0V, IDR=500mA, VOLL=VOLR 4
Fig.3 Fig.3 Fig.3 Fig.1 Fig.1
LDINF=LDINR=5V, IINL=IQ5F, IQ5R, IQ6F, IQ6R LDCONT=5V, ILDC=ILDC
Fig.1 Fig.1
VREG1 VRL1 VVCC1 IREGSI1 IREG1
2 2 3 IREG=0~200mA VCC=6~10V, IREG=100mA REGOUT=2.5V, IREGSI1=IQREGSW1 REGSW=5V, IREGSI1=IQREGSW1
Fig.1 Fig.1 Fig.1 Fig.1 Fig.1
VREG2 VRL2 VVCC2 IREGSI2 IREG2
2 2 3 IREG=0~200mA VCC=7~10V, IREG=100mA REGOUT=4V, IREGSI2=IQREGSW2 REGSW=5V, IREGSI2=IQREGSW2
Fig.1 Fig.1 Fig.1 Fig.1 Fig.1
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BD7961FM
Optical disc ICs
!Application example
REG2 OUT 5.0V5% REG1 OUT 3.3V5% VCC3 LOADING1 CONT LOADING2 CONT
BIAS
MUTE
M
36 35
CH6
VCC2
GND3
VCC1
34
33
32
31
30
29
28 VCC2
27 GND3 (REG GND)
26 VCC3
25 VCC1
24
23
22
CH4
21
10k
20
CH3
19
10k
10k + -
10k + -
+ -
+ -
BIAS
MUTE (CH1~CH4)
+-
-+
(POW VCC CH5/6)
(PRE VCC (POW VCC REG VCC) CH1~4)
10k
10k
10k
10k
LD CONT1
LD CONT2 REG2 REG1
Level shift
Level shift
47k REG2 SW + - - + -+
47k -+
Level shift + -
Level shift + -
23.5k
10k 10k 10k 10k
47k -+ REG1 SW 23.5k
47k
+ -
(POW GND CH5/6) F
CH5
+ -
+ -
R
R
F 23.5k 23.5k 12 13
(POW GND CH1~CH4) 8 9 10 11 14
CH2
CH1
1
2
3
4
5
6
7
15
16
17
GND2
M
LOADING1 FWD IN LOADING2 REV IN REG2 SW REG1 SW CH4_IN CH3_IN CH1_IN CH2_IN
GND1
M
M
LOADING1 REV IN
LOADING2 FWD IN
The resistance values are indicated in []
Fig.4
!Operation notes (1) BD7961FM has a built-in thermal shutdown circuit. When the chip temperature reaches 175C (Typ.), the output current from all drivers is muted. When the chip temperature returns to 150C (Typ.), the circuit of the driver unit starts up. (2) When the mute terminal (pin33) is opened or the terminal voltage is reduced to 0.5V or less, the output current of the BTL driver unit is muted. In the normal state of use, pull up the voltage to 2.0V or more. (3) When the voltage of the regulator switch terminals (pin8 and 9) is increased to 2.0V or more, the output from the regulator is muted. In the normal state of use, pull down the voltage to 0.5V or less. (4) When the bias terminal (pin36) voltage is reduced to 0.7V or less, the BTL driver unit is muted. In the normal state of use, set the voltage to 1.1V or more. (5) Thermal shutdown mutes all drivers. When the mute ON voltage and the bias terminal voltage are reduced, only the BTL drivers are muted. When the drivers are muted, the BTL driver output terminal voltage becomes the internal bias voltage (VCC1-0.7)/2V.
+ -
-+
Control logic
Control logic
18
+
10k
-
10k
+
10k
-
10k
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BD7961FM
Optical disc ICs
(6) The loading drivers operate according to the following logic.
INPUT FWD L L H H REV L H L H OUTPUT OUT+ Hi Z L H L OUT- Hi Z H L L Function High impedance REV mode FWD mode Brake mode
The output voltage can be changed by adjusting the voltage input to the LDCONT terminal (gain of 6dB Typ.). However, even if the input voltage is increased excessively, the output voltage will not exceed the max. output voltage that depends on the supply voltage. (7) Supply the same voltage to VCC1 (pin25), VCC2 (pin28) and VCC3 (pin26). Insert by the pass capacitor (approx. 0.1F) between VCC pin and GND pin of IC as near as possible. (8) Connect the radiating fin with external GND. (9) Output pin is to avoid short-circuit with VCC, GND and other output pins. An integrated circuit is damaged, and smoke may come out by the case.
!Electrical characteristic curves
30
CIRCUIT CURRENT : ICC (mA)
OUTPUT VOLTAGE : VO (V)
25 20 15 10 5 0
5
R=8
LOSS VOLTAGE : VLOSS (V)
RegVCC=POW VCC BIAS= 1 VCC 2
VCC=8V, BIAS=2.5V
R=20
2.0 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0
VCC=8V, BIAS=2.5V VIN=GND or VCC
MUTE=H
0
MUTE=L
-5
0
5
10
15
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
0
100 200 300 400 500 600 700 800 900 1000 LOAD CURRENT : IL (mA)
SUPPLY VOLTAGE : VCC (V)
INPUT VOLTAGE : VIN (V)
Fig.5 Circuit current characteristic
Fig.6 Input-output characteristic
Fig.7 Output load current regulation
0.3
LOSS VOLTAGE : VLOSS (V)
8+47H
REGULATOR1 VOLTAGE : VREG1 (V)
VCC=8V, LDCONT=Sweep
OUTPUT VOLTAGE : VOLD (V)
(FWD)
20+47H
0.4 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 VCC=8V, LDCONT=8V -0.6 FWD=H (8V) -0.7 REV=L (0V) 0 100 200 300 400 500 600 700 800 900 1000 LOAD CURRENT : IL (mA)
3.5 3.0
IO=200mA
5
2.5 2.0 1.5 1.0 0.5 0 0 1 2 3
IO=500mA
0
-5
(REV)
-5
0 LDCONT VOLTAGE : VLD (V)
5
4
5
6
7
8
9
10
SUPPLY VOLTAGE : VCC (V)
Fig.8 Input-output characteristic
Fig.9 Output load current regulation
Fig.10 Reg1 power supply characteristic
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BD7961FM
Optical disc ICs
5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 1 2 3 4 5 6 7 8 9 10
0 0 25 50 75 100 125 150
IO=200mA
REGULATOR2 VOLTAGE : VREG2 (V)
3
POWER DISSIPATION : (W)
IO=500mA
70mmx70mm, thickness of 1.6mm, percentage occupied by copper foil of less than 3%, glass epoxy mounting.
2
1
SUPPLY VOLTAGE : VCC (V)
AMBIENT TEMPERATURE : Ta (C)
Fig.11 Reg2 power supply characteristic
Fig.12 Power dissipation
!External dimensions (Units : mm)
18.50.1
36 19
9.90.2
7.50.1
0.85
1
18
2.4Max.
2.770.1 0.8 0.37+0.05 -0.04
0.27+0.055 -0.045 0.08 S 0.08 M
2.20.05 0.10.05
HSOP-M36
0.50.15 1.20.2
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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 use silicon as a basic material. 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-Rev1.0

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