BD7961FM
Optical disc ICs
1/9
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=1.0Ω).
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=25°C)
Parameter Symbol Limits Unit
V
CC
Pd
Topr
Tstg −55 to +150
15
2200∗
−35 to +85
V
mW
°C
°C
Supply voltage
Power dissipation
Operating temperature range
Storage temperature range
∗ Reduced by 17.6mW for each increase in Ta of 1°C over 25°C, on less than 3%
(percentage occupied by copper foil), 70mm×70mm, t=1.6mm, glass epoxy mounting.
!
!!
!Recommended operating conditions (Ta=25°C)
Parameter Symbol Max.Typ.Min. Unit
V
CC
1
14.0V
CC
2
14.08.04.5
8.04.5
V
V
14.0V
CC
3 8.06.0 V
∗ When REG2 (5.0-V regulator) is not used, the supply voltage3 (VCC3) is 4.5 to 14.0V.
Supply voltage 1
Supply voltage 2
Supply voltage 3∗
BD7961FM
Optical disc ICs
2/9
!
!!
!Block diagram
Level shift
V
CC
1
V
CC
3
GND
1
GND
3
GND
2
(REG GND)
(PRE V
CC
REG V
CC
)(POW V
CC
CH1
~4
)
(POW V
CC
CH5/6)
(CH1
~
CH4)
(POW GND
CH5/6)
10k
+
−
V
CC
2
47k
10k
+
−
10k
10k
10k
10k
10k
+
−
10k
10k
10k
10k
10k
10k
10k
10k
10k
+
−
−+ −+
Level shift
Level shift
LD
CONT2
LD
CONT1
Level shift
−+
−+−+
+
−
+
−
+
−
+
−
REG2 SW
REG2 REG1
MUTE
CH1
CH3
CH2
CH4
47k
23.5k
23.5k
−+
47k
23.5k
23.5k
−+
47k
−+
FR
REG1 SW
−
+
Control
logic RF
+
−
Control
logic
CH5
CH6
−+ −+
BIAS
18171615141310 11 127 8 9654321
19202122232427 26 2530 29 28313233343536
!
!!
!Pin descriptions
Pin No. Pin name Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
GND2
OUT5−
OUT5+
IN5FWD
IN5REV
IN6REV
IN6FWD
REG2SW
REG1SW
IN4
IN3
IN1
IN2
GND1
OUT2−
OUT2+
OUT1−
OUT1+
Pin No. Pin name Function
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
OUT3+
OUT3−
OUT4+
OUT4−
LDCONT2
LDCONT1
V
CC
1
V
CC
3
GND3
V
CC
2
REG1OUT
REG1_B
REG2_B
REG2OUT
MUTE
OUT6+
OUT6−
BIAS
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 +
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
BD7961FM
Optical disc ICs
3/9
!
!!
!Input output circuit
BIAS
OUT1+/OUT1−/OUT2+/OUT2−
OUT3+/OUT3−/OUT4+/OUT4−
IN1/IN2/IN3/IN4
REG1OUT/REG2OUT REG1_B/REG2_B
OUT5+/OUT5−
OUT6+/OUT6−LDCONT1/LDCONT2
MUTE
36pin 3k
50k50k
V
CC
1
33pin
50k
50k
V
CC
1
REG1SW/REG2SW
8, 9pin
20k
20k
V
CC
1
15~22pin
10k
10k 10k
10k
V
CC
1V
CC
1
IN5FWD/IN5REV
IN6FWD/IN6REV
4, 5, 6, 7
pin
25k
200k
25k
V
CC
1
23, 24
pin
40k
V
CC
1
30, 31pin
V
CC
1
V
CC
3
2, 35pin
3, 34pin
V
CC
2
GND2
29, 32pin
20k
(8.5k)
30k
(24k)
BG
V
CC
1
10, 11
12, 13pin
23.5k
V
CC
1
BD7961FM
Optical disc ICs
4/9
!
!!
!Electrical characteristics
(unless otherwise noted, Ta=25°C, VCC1, VCC2, VCC3=8V, BIAS=2.5V, RL=8Ω)
I
CC
1
I
CC
2
V
OFS
V
OM
G
VC
∆G
VC
V
OFSL
V
OLH
V
OLL
G
VLD
∆G
VLD
V
REG1
∆V
RL1
∆VV
CC1
I
REGSI1
V
REG2
∆V
RL2
∆VV
CC2
I
REGSI2
12
5
−70
5.4
16
−2.0
−35
−
−
4.0
−2.0
3.135
5
5
2
4.75
5
5
2
25
10
0
6.0
18
0
0
0.32
0.18
6.0
0
3.300
10
10
−
5.00
10
10
−
38
15
+70
−
20
2.0
+35
0.48
0.27
8.0
2.0
3.465
20
20
−
5.25
20
20
−
mA
mA
mV
V
dB
dB
mV
V
V
dB
dB
V
mV
mV
mA
V
mV
mV
mA
Parameter Symbol Min. Typ. Max. Unit Conditions
Under no load
Under no load
V
IN
=BIAS±0.5V
When brake is applied
I
O
=500mA
I
O
=500mA
LDCONT=1V
I
O
=0~200mA
V
CC
=6~10V I
O
=100mA
I
O
=0~200mA
V
CC
=7~10V I
O
=100mA
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.
BD7961FM
Optical disc ICs
5/9
!
!!
!Measurement circuits
Level shift
(REG GND)
(PRE V
CC
REG V
CC
)(POW V
CC
CH1
~4
)
(POW V
CC
CH5/6)
(CH1
~
CH4)
(POW GND
CH5/6)
10k
+
−
47k
10k
+
−
10k
10k
10k
10k
10k
+
−
10k
10k
10k
10k
10k
10k
10k
10k
10k
+
−
−+ −+
Level shift
Level shift
LD
CONT2
LD
CONT1
Level shift
−+
−+−+
+
−
+
−
+
−
+
−
REG2 SW
REG2 REG1
MUTE
CH1
CH3
CH2
CH4
47k
23.5k
23.5k
−+
47k
23.5k
23.5k
−+
47k
−+
FR
REG1 SW
−
+
Control
logic RF
+
−
Control
logic
CH5
CH6
−+ −+
BIAS
18171615141310 11 127 8 9654321
19202122232427 26 2530 29 28313233343536
Fig.1
IQ5F
LDINF
The resistance values
are indicated in [Ω]
OUT−
OUT+
(CH5)
OUT_LD
A
IQ5R
LDINR
A
IQ6R
LDINR
A
IQ6F
IQREGSW2 IQREGSW1
LDINF
A
REGSW
A
REGSW
A
VIN VIN VIN VIN
OUT−
OUT+
(CH1)
OUT_A
OUT−
OUT+
(CH2)
OUT_A
V
CC
3V
CC
2
ILDC2
ILDC1
LDCONT
A
IQ3
IQREG1
2SB11822SB1182
IREG
REGOUT
112233
IQREG2
A
IMUTE
VMUTE
47µF
47µF
A
REGOUT
VB
IQB
A
LDCONT
A
IQ1
V
CC
1
A
IQ2
A
OUT−
OUT+
OUT_A
(CH3)
OUT−
OUT+
OUT_LD
(CH6)
OUT−
OUT+
OUT_A
(CH4)
IREG
SW2 SW2
A A
Fig.2
+
VO
RL
RL=8Ω
V
OUT+
OUT−
OUT_A
Fig.3
VOLD
VOLRVOLF
IDR
SW1
SW1 V
V
V
12
IDF
1
2
REV
FWD
OUT_LD
BD7961FM
Optical disc ICs
6/9
!
!!
!Switch table for measuring circuit diagrams
(unless otherwise noted, Ta=25°C, VCC1, VCC2, VCC3=8V, BIAS=2.5V, RL=8Ω Unless otherwise specified, the switch 1
is used.)
I
CC
1
I
CC
2
V
OFS
V
OM
G
VC
∆G
VC
I
MUTE
I
BIAS
V
OFSL
V
OLH
V
OLL
G
VLD
∆G
VLD
I
INL
I
LDC
V
REG1
∆V
RL1
∆VV
CC1
I
REGSI1
I
REG1
V
REG2
∆V
RL2
∆VV
CC2
I
REGSI2
I
REG2
2
2
2
2
3
2
2
3
Parameter Symbol SWITCH
12
Measurement
circuit
Conditions
∗1Fig.1
Fig.1
Fig.2
Fig.2
Fig.2
Fig.2
Fig.1
Fig.1
Fig.3
Fig.3
Fig.3
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
VMUTE=5V, IMUTE=IMUTE
VB=2.5V, IBIAS=IQB
LDINF=LDINR=5V, VOFSL=VOLD
LDINF=5V, LDINR=0V, IDR=500mA, VOLL=VOLR
LDINF=LDINR=5V, IINL=IQ5F, IQ5R, IQ6F, IQ6R
LDCONT=5V, ILDC=ILDC
IREG=0~200mA
V
CC
=6~10V, IREG=100mA
REGOUT=2.5V, IREGSI1=IQREGSW1
REGSW=5V, IREGSI1=IQREGSW1
IREG=0~200mA
V
CC
=7~10V, IREG=100mA
REGOUT=4V, IREGSI2=IQREGSW2
REGSW=5V, IREGSI2=IQREGSW2
∗2
∗3
∗4
V
IN
=VB, VOFS=VO
V
IN
=V
CC
, VOM=VO
V
IN
=VB±0.5V, GVC=20log (VO/0.5)
∗1 LDINF=LDINR=0V, REGSW=0V, VMUTE=5V, I
CC
1=IQ1+IQ2+IQ3
∗2 LDINF=LDINR=0V, REGSW=0V, VMUTE=0V, I
CC
2=IQ1+IQ2+IQ3
∗3 LDINF=5V, LDINR=0V, IDF=500mA, VOLH=V
CC
-VOLF
∗4 LDINF=5V, LDINR=0V, LDCONT=1V, GVLD=20log (VOLD/LDCONT)
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
BD7961FM
Optical disc ICs
7/9
!
!!
!Application example
Level shift
V
CC1
V
CC3
GND
3
(REG GND)
(PRE V
CC
REG V
CC
)(POW V
CC
CH1
~4
)
(POW GND
CH1
~
CH
4
)
(POW V
CC
CH5/6)
(CH1
~
CH4)
(POW GND
CH5/6)
10k
+
−
V
CC2
47k
10k
+
−
10k
10k
10k
10k
10k
+
−
10k
10k
10k
10k
10k
10k
10k
10k
10k
+
−
−+ −+
Level shift
Level shift
LD
CONT2
LD
CONT1
Level shift
−+
−+−+
+
−
+
−
+
−
+
−
REG2 SW
REG2 REG1
MUTE
CH1
CH3
CH2
CH4
47k
23.5k
23.5k
−+
47k
23.5k
23.5k
−+
47k
−+
FR
REG1 SW
−
+
Control
logic RF
+
−
Control
logic
CH5
CH6
−+ −+
BIAS
18171615141310 11 127 8 9654321
19202122232427 26 2530 29 28313233343536
V
CC2
MMM
LOADING2
FWD IN
LOADING1
REV IN
LOADING2
REV IN CH4_IN CH3_IN CH1_IN CH2_INLOADING1
FWD IN
GND2 GND1
REG2 SW REG1 SW
BIAS MUTE
REG2 OUT
5.0V±5% REG1 OUT
3.3V±5%
LOADING2
CONT
LOADING1
CONT
M
The resistance values are indicated in [Ω]
V
CC1
V
CC3
GND
3
Fig.4
!
!!
!Operation notes
(1) BD7961FM has a built-in thermal shutdown circuit.
When the chip temperature reaches 175°C (Typ.), the output current from all drivers is muted.
When the chip temperature returns to 150°C (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.
BD7961FM
Optical disc ICs
8/9
(6) The loading drivers operate according to the following logic.
FWD
INPUT OUTPUT Function
High impedance
REV mode
FWD mode
Brake mode
REV OUT+OUT−
L
H
L
H
L
L
H
H
Hi Z
L
H
L
Hi Z
H
L
L
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. 0.1µF) 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
0 5 10 15
0
10
5
15
20
25
30
CIRCUIT CURRENT : ICC (mA)
SUPPLY VOLTAGE : VCC (V)
Fig.5 Circuit current characteristic
MUTE=H
MUTE=L
RegVCC=POW VCC
BIAS= VCC
2
1
−1.5 0−0.5−1.0 0.5 1.0 1.5
0
5
−5
OUTPUT VOLTAGE : VO (V)
INPUT VOLTAGE : VIN (V)
Fig.6 Input-output characteristic
R=20Ω
R=8Ω
VCC=8V, BIAS=2.5V
0 500 600 700 900800200 300 400100 1000
0
1.5
1.0
0.5
−0.5
−1.0
−1.5
−2.0
2.0
LOSS VOLTAGE : V
LOSS
(V)
LOAD CURRENT : I
L
(mA)
Fig.7 Output load current regulation
V
CC
=8V, BIAS=2.5V
V
IN
=GND or V
CC
0−55
0
5
−5
OUTPUT VOLTAGE : VOLD (V)
LDCONT VOLTAGE : VLD (V)
Fig.8 Input-output characteristic
20+47µH
8+47µH
(FWD)
(REV)
V
CC
=8V,
LDCONT=Sweep
0 500 600 700 900800200 300 400100 1000
0
0.3
0.2
0.1
−0.1
−0.2
−0.3
−0.7
−0.6
−0.5
−0.4
0.4
LOSS VOLTAGE : VLOSS (V)
LOAD CURRENT : IL (mA)
Fig.9 Output load current regulation
VCC=8V, LDCONT=8V
FWD=H (8V)
REV=L (0V)
056798234110
0
1.5
1.0
0.5
3.5
2.5
3.0
2.0
REGULATOR1 VOLTAGE : VREG1 (V)
SUPPLY VOLTAGE : VCC (V)
Fig.10 Reg1 power supply characteristic
I
O
=500mA
I
O
=200mA
BD7961FM
Optical disc ICs
9/9
056798234110
0
1.5
1.0
0.5
5.0
2.5
3.0
3.5
4.0
4.5
2.0
REGULATOR2 VOLTAGE : VREG2 (V)
SUPPLY VOLTAGE : VCC (V)
Fig.11 Reg2 power supply characteristic
I
O
=500mA
I
O
=200mA
0 100 125 15025 50 75
0
1
2
3
POWER DISSIPATION : (W)
AMBIENT TEMPERATURE : Ta (°C)
Fig.12 Power dissipation
70mm×70mm, thickness of 1.6mm, percentage
occupied by copper foil of less than 3%,
glass epoxy mounting.
!
!!
!External dimensions (Units : mm)
HSOP-M36
18.5±0.1
7.5±0.1
9.9±0.2
36 19
118
0.37
+0.05
−0.04
0.27
+0.055
−0.045
2.77±0.1
0.5±0.15
1.2±0.2
0.8
0.85
2.4Max.
2.2±0.05
0.1
±0.05
0.08 S
0.08 M
Appendix
Appendix1-Rev1.0
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.
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.
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.
