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Part: BD7961FM
Category:
Optoelectronics
-> Drivers/Controllers
-> Optical Drivers
Description:
Company: ROHM Electronics
Datasheet: Download BD7961FM datasheet File size : 130 kB
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Datasheet text preview:
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=25°C)
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 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 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=25°C, 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=BIAS±0.5V
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 47µF LDCONT LDCONT
47µF 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
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
+
OUT+
VB
IQREG2
IQREG1
OUT_A (CH3)
IQ1
ILDC2
-
+
-
10k + - 10k 10k
10k + - 10k 10k 10k 10k
+ -
+ - 10k
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