ROHM BD7961FM

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=1.0Ω).
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
Supply voltage
Symbol
Limits
Unit
VCC
15
V
mW
Pd
2200∗
Operating temperature range
Topr
−35 to +85
°C
Storage temperature range
Tstg
−55 to +150
°C
Power dissipation
∗ 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)
Symbol
Min.
Typ.
Max.
Unit
Supply voltage 1
Parameter
VCC1
4.5
8.0
14.0
V
Supply voltage 2
VCC2
4.5
8.0
14.0
V
Supply voltage 3∗
VCC3
6.0
8.0
14.0
V
∗ When REG2 (5.0-V regulator) is not used, the supply voltage3 (VCC3) is 4.5 to 14.0V.
1/9
BD7961FM
Optical disc ICs
!Block diagram
33
32
31
30
29
28
27
26
GND3
VCC2
25
VCC3
24
23
22
+
−
9
10
11
23.5k
12
13
GND1
14
CH2
15
10k
8
10k
7
10k
6
10k
5
10k
4
+
−
F
23.5k
3
10k
+ −
10k
R
CH5
2
47k
+ −
10k
23.5k
REG1 SW
10k
R
+
Level shift
−
+
10k
47k
Control
logic
F
−
Level shift
23.5k
+
Control
logic
GND2
1
−
Level shift
−
+
+ −
REG2 SW
(POW GND
CH5/6)
10k
47k
47k
−
+
Level shift
REG1
+ −
+
+
−
−
LD
CONT2
REG2
10k
LD
CONT1
10k
− +
19
CH3
+
−
(PRE VCC (POW VCC
CH1~4)
REG VCC)
(POW VCC
CH5/6)
10k
+ −
(CH1~CH4)
+
−
MUTE
20
10k
10k
(REG GND)
BIAS
21
CH4
VCC1
+
−
34
CH6
+
−
35
+
−
36
CH1
16
17
18
!Pin descriptions
Pin No.
Pin name
Function
Pin No.
Pin name
Function
1
GND2
POW GND (loading driver unit)
19
OUT3+
BTL driver (CH3) output +
2
OUT5−
Loading driver (CH5) output −
20
OUT3−
BTL driver (CH3) output −
3
OUT5+
Loading driver (CH5) output +
21
OUT4+
BTL driver (CH4) output +
4
IN5FWD
Loading driver (CH5) FWD input
22
OUT4−
BTL driver (CH4) output −
5
IN5REV
Loading driver (CH5) REV input
23
LDCONT2
Loading driver (CH6) voltage setting terminal
6
IN6REV
Loading driver (CH6) REV input
24
LDCONT1
Loading driver (CH5) voltage setting terminal
7
IN6FWD
Loading driver (CH6) FWD input
25
VCC1
Supply voltage (BTL driver unit)
8
REG2SW
Regulator 2 switch terminal
26
VCC3
Supply voltage (regulator unit)
9
REG1SW
Regulator 1 switch terminal
27
GND3
10
IN4
CH4 input
28
VCC2
11
IN3
CH3 input
29
REG1OUT
12
IN1
CH1 input
30
REG1_B
Regulator 1 Tr base
13
IN2
CH2 input
31
REG2_B
Regulator 2 Tr base
14
GND1
POW GND (BTL driver unit)
32
REG2OUT
15
OUT2−
BTL driver (CH2) output −
33
MUTE
BTL driver mute terminal
16
OUT2+
BTL driver (CH2) output +
34
OUT6+
Loading driver (CH6) output +
17
OUT1−
BTL driver (CH1) output −
35
OUT6−
Loading driver (CH6) output −
18
OUT1+
BTL driver (CH1) output +
36
BIAS
REG GND (regulator unit)
Supply voltage (loading driver unit)
Regulator 1 output
Regulator 2 output
BIAS terminal
2/9
BD7961FM
Optical disc ICs
!Input output circuit
OUT1+/OUT1−/OUT2+/OUT2−
OUT3+/OUT3−/OUT4+/OUT4−
IN1/IN2/IN3/IN4
VCC1
VCC1
VCC1
10k
23.5k
15~22pin
10k
10, 11
12, 13pin
10k
10k
IN5FWD/IN5REV
IN6FWD/IN6REV
OUT5+/OUT5−
OUT6+/OUT6−
LDCONT1/LDCONT2
VCC2
VCC1
4, 5, 6, 7
pin
VCC1
200k
23, 24
pin
2, 35pin
25k
3, 34pin
40k
25k
GND2
REG1OUT/REG2OUT
REG1_B/REG2_B
VCC3
VCC1
VCC1
20k
(8.5k)
29, 32pin
30, 31pin
30k
(24k)
BG
MUTE
REG1SW/REG2SW
VCC1
BIAS
VCC1
8, 9pin
VCC1
33pin
36pin
20k
50k
3k
20k
50k
50k
50k
3/9
BD7961FM
Optical disc ICs
!Electrical characteristics
(unless otherwise noted, Ta=25°C, VCC1, VCC2, VCC3=8V, BIAS=2.5V, RL=8Ω)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Quiescent current
ICC1
12
25
38
mA
Under no load
Conditions
Quiescent current (BTL MUTE)
ICC2
5
10
15
mA
Under no load
Output offset voltage
VOFS
−70
0
+70
mV
Max. output amplitude
VOM
5.4
6.0
−
V
Closed circuit voltage gain
GVC
16
18
20
dB
∆GVC
−2.0
0
2.0
dB
Output offset voltage
VOFSL
−35
0
+35
mV
Output saturation voltage H
VOLH
−
0.32
0.48
V
IO=500mA
Output saturation voltage L
VOLL
−
0.18
0.27
V
IO=500mA
Voltage gain
GVLD
4.0
6.0
8.0
dB
LDCONT=1V
∆GVLD
−2.0
0
2.0
dB
Output voltage
VREG1
3.135
3.300
3.465
V
Output load stability
∆VRL1
5
10
20
mV
IO=0~200mA
Supply voltage stability
∆VVCC1
5
10
20
mV
VCC=6~10V IO=100mA
REG1_B terminal sink current
IREGSI1
2
−
−
mA
Output voltage
VREG2
4.75
5.00
5.25
V
Output load stability
∆VRL2
5
10
20
mV
IO=0~200mA
Supply voltage stability
∆VVCC2
5
10
20
mV
VCC=7~10V IO=100mA
RE2_B terminal sink current
IREGSI2
2
−
−
mA
〈 BTL driver CH1 to CH4 〉
Difference between positive and nagative voltage gains
VIN=BIAS±0.5V
〈 Loading driver CH5 and CH6 〉
Difference between positive and nagative voltage gains
When brake is applied
〈 Regulator 1〉
〈 Regulator 2〉
The product is not designed for protection against radioactive rays.
4/9
BD7961FM
Optical disc ICs
3
REGOUT
IREG
IREG
REGOUT
!Measurement circuits
2
1
1
SW2
2
3
47µF
SW2
LDCONT LDCONT
47µF
A
A
IQ3
IMUTE
32
31
30
29
28
27
A
A
A
23
22
26
25
24
20
CH4
+
−
A
IQ6R
IQ6F
9
A
A
10
23.5k
VIN
LDINR
12
CH2
13
14
IQREGSW2 IQREGSW1
(CH5)
OUT_LD
LDINF LDINR
11
VIN
VIN
CH1
15
16
17
OUT−
A
IQ5R
8
OUT+
OUT+
A
IQ5F
7
OUT−
OUT−
6
(CH2)
OUT_A
VIN
10k
A
5
10k
4
10k
F
10k
R
10k
+ −
23.5k
3
10k
47k
+ −
CH5
2
+
−
23.5k
REG1 SW
10k
47k
10k
R
23.5k
+
Control
logic
F
+
Level shift
Level shift
−
+
10k
(POW GND
CH5/6)
−
Level shift
−
+
+ −
REG2 SW
−
Control
logic
10k
47k
47k
−
+
Level shift
REG1
+ −
+
10k
−
LD
CONT2
REG2
+
−
LD
CONT1
10k
− +
+
−
(CH1~CH4)
(PRE VCC (POW VCC
REG VCC)
CH1~4)
(POW VCC
CH5/6)
10k
+ −
+
−
MUTE
10k
(REG GND)
BIAS
19
CH3
10k
10k
CH6
18
(CH1)
OUT_A
The resistance values
are indicated in [Ω]
LDINF REGSW REGSW
Fig.1
OUT_A
OUT_LD
+
V
REV
FWD
OUT−
OUT+
1
21
ILDC1
+
−
33
A
OUT+
34
IQ2
+
−
35
A
OUT_A
(CH3)
+
−
36
ILDC2
IQ1
OUT−
A
OUT_A
(CH4)
IQREG1
IQREG2
OUT+
OUT+
A
VMUTE
VCC1
OUT−
IQB
OUT−
OUT_LD
(CH6)
VB
VCC2
OUT+
VCC3
2SB1182 2SB1182
VO
VOLD
V
RL
V
V
SW1
SW1
VOLF
RL=8Ω
2
VOLR
1
2
1
Fig.2
IDR
IDF
Fig.3
5/9
BD7961FM
Optical disc ICs
!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.)
Parameter
Symbol
SWITCH
1
Conditions
2
Measurement
circuit
Quiescent current
ICC1
∗1
Fig.1
Quiescent current (BTL MUTE)
ICC2
∗2
Fig.1
Output offset voltage
VOFS
VIN=VB, VOFS=VO
Fig.2
Max. output amplitude
VOM
VIN=VCC, VOM=VO
Fig.2
Closed circuit voltage gain(CH1 to CH4)
GVC
VIN=VB±0.5V, GVC=20log (VO/0.5)
Fig.2
〈 BTLdriver CH1 to CH4 〉
Difference between positive and negative voltage gains (CH1 to CH4)
∆GVC
Mute terminal sink current
IMUTE
VMUTE=5V, IMUTE=IMUTE
Fig.1
Bias terminal sink current
IBIAS
VB=2.5V, IBIAS=IQB
Fig.1
Fig.2
〈 Loading driver CH5 and CH6 〉
Output offset voltage
VOFSL
LDINF=LDINR=5V, VOFSL=VOLD
Fig.3
Output saturation voltage H
VOLH
2
∗3
Fig.3
Output saturation voltage L
VOLL
2
LDINF=5V, LDINR=0V, IDR=500mA, VOLL=VOLR
Fig.3
Voltage gain (Loading)
GVLD
∗4
Fig.1
Difference between positive and negative voltage gains (Loading)
∆GVLD
Fig.1
Input terminal sink current
IINL
LDINF=LDINR=5V, IINL=IQ5F, IQ5R, IQ6F, IQ6R
Fig.1
LDCONT terminal source current
ILDC
LDCONT=5V, ILDC=ILDC
Fig.1
〈 Regulator 1 〉
Fig.1
Output voltage
VREG1
Output load stability
∆VRL1
2
IREG=0~200mA
Fig.1
Supply voltage stability
∆VVCC1
2
VCC=6~10V, IREG=100mA
Fig.1
REG1_B terminal sink current
IREGSI1
3
REGOUT=2.5V, IREGSI1=IQREGSW1
Fig.1
REG1SW terminal sink current
IREG1
REGSW=5V, IREGSI1=IQREGSW1
Fig.1
〈 Regulator 2 〉
Fig.1
Output voltage
VREG2
Output load stability
∆VRL2
2
IREG=0~200mA
Fig.1
Supply voltage stability
∆VVCC2
2
VCC=7~10V, IREG=100mA
Fig.1
REG2_B terminal sink current
IREGSI2
3
REGOUT=4V, IREGSI2=IQREGSW2
Fig.1
REG2SW terminal sink current
IREG2
REGSW=5V, IREGSI2=IQREGSW2
Fig.1
∗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)
6/9
BD7961FM
Optical disc ICs
!Application example
REG2 OUT
5.0V±5%
LOADING1
CONT
MUTE
M
34
33
32
31
30
29
28
27
26
GND3
VCC2
25
VCC3
24
23
22
+
−
23.5k
23.5k
3
4
5
6
7
8
9
10
11
12
13
M
LOADING1
FWD IN
LOADING2
REV IN
LOADING1
REV IN
REG2 SW
CH2
14
GND1
REG1 SW
15
CH1
16
M
10k
(POW GND
CH1~CH4)
F
10k
R
10k
+ −
10k
GND2
2
47k
+ −
10k
23.5k
REG1 SW
CH5
1
+
Level shift
−
+
10k
47k
10k
R
−
Level shift
23.5k
+
Control
logic
F
Level shift
−
+
10k
(POW GND
CH5/6)
10k
REG2 SW
−
Control
logic
+
−
47k
+ −
+ −
−
+
Level shift
REG1
47k
+
10k
REG2
10k
−
LD
CONT2
+
−
10k
LD
CONT1
10k
(PRE VCC (POW VCC
REG VCC)
CH1~4)
19
CH3
+
−
− +
10k
+ −
+
−
MUTE
(CH1~CH4)
(POW VCC
CH5/6)
20
10k
(REG GND)
BIAS
21
CH4
VCC1
10k
CH6
+
−
35
+
−
36
LOADING2
CONT
VCC1
GND3
VCC2
+
−
BIAS
VCC3
REG1 OUT
3.3V±5%
17
18
M
CH4_IN CH3_IN CH1_IN CH2_IN
LOADING2
FWD IN
The resistance values are indicated in [Ω]
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.
7/9
BD7961FM
Optical disc ICs
(6) The loading drivers operate according to the following logic.
INPUT
FWD
OUTPUT
Function
REV
OUT+
OUT−
L
L
Hi Z
Hi Z
High impedance
L
H
L
H
REV mode
H
L
H
L
FWD mode
H
H
L
L
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. 0.1µF) 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
25
20
15
MUTE=L
10
R=8Ω
5
VCC=8V, BIAS=2.5V
VIN=GND or VCC
2.0
R=20Ω
LOSS VOLTAGE : VLOSS (V)
MUTE=H
OUTPUT VOLTAGE : VO (V)
CIRCUIT CURRENT : ICC (mA)
VCC=8V, BIAS=2.5V
RegVCC=POW VCC
BIAS= 1 VCC
2
30
0
−5
5
1.5
1.0
0.5
0
−0.5
−1.0
−1.5
−2.0
0
5
10
−1.0
−0.5
0
0.5
1.0
1.5
0
100 200 300 400 500 600 700 800 900 1000
SUPPLY VOLTAGE : VCC (V)
INPUT VOLTAGE : VIN (V)
LOAD CURRENT : IL (mA)
Fig.5 Circuit current characteristic
Fig.6 Input-output characteristic
Fig.7 Output load current regulation
(FWD)
0.3
8+47µH
5
0
−5
(REV)
−5
0.4
20+47µH
0
5
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
REGULATOR1 VOLTAGE : VREG1 (V)
VCC=8V,
LDCONT=Sweep
OUTPUT VOLTAGE : VOLD (V)
−1.5
15
LOSS VOLTAGE : VLOSS (V)
0
3.5
3.0
IO=200mA
IO=500mA
2.5
2.0
1.5
1.0
0.5
0
0
1
2
3
4
5
6
7
8
9
10
LDCONT VOLTAGE : VLD (V)
LOAD CURRENT : IL (mA)
SUPPLY VOLTAGE : VCC (V)
Fig.8 Input-output characteristic
Fig.9 Output load current regulation
Fig.10 Reg1 power supply characteristic
8/9
BD7961FM
5.0
IO=200mA
4.5
70mm×70mm, thickness of 1.6mm, percentage
occupied by copper foil of less than 3%,
glass epoxy mounting.
3
IO=500mA
POWER DISSIPATION : (W)
REGULATOR2 VOLTAGE : VREG2 (V)
Optical disc ICs
4.0
3.5
3.0
2.5
2.0
1.5
1.0
2
1
0.5
0
0
1
2
3
4
5
6
7
8
9
0
10
0
25
50
75
100
125
150
SUPPLY VOLTAGE : VCC (V)
AMBIENT TEMPERATURE : Ta (°C)
Fig.11 Reg2 power supply characteristic
Fig.12 Power dissipation
!External dimensions (Units : mm)
18.5±0.1
2.2±0.05
0.1±0.05
0.85
2.4Max.
0.5±0.15
1.2±0.2
19
7.5±0.1
9.9±0.2
36
1
18
2.77±0.1
0.8
0.27+0.055
−0.045
0.08 S
0.37+0.05
−0.04
0.08 M
HSOP-M36
9/9
Appendix
Notes
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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
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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
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safety devices), please be sure to consult with our sales representative in advance.
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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