JVC CH-X1500RF Service Manual page 32

CH-X1500RF
4.3 BD7961FM-X (IC681) : Power driver
• Pin layout & Block diagram
36 35 34
CH6
BIAS
(POW GND
CH5/6)
CH5
GND2
1 2 3
• Pin functions
Pin No Symbol
1 GND2
2 OUT5-
3 OUT5+
4 IN5FWD
5 IN5REV
6 IN6REV
7 IN6FWD
8 REG2SW Regulator 2 switch terminal
9 REG1SW Regulator 1 switch terminal
10 IN4
11 IN3
12 IN1
13 IN2
14 GND1
15 OUT2-
16 OUT2+
17 OUT1-
18 OUT1+
1-32 (No.49804)
33 32 31 30 29
MUTE
(CH1~CH4)
REG2 REG1
REG2 SW
Control Control
logic logic
R R
F F
4 5 6 7 8
Function
Power 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
CH4 input
CH3 input
CH1 input
CH2 input
Power GND (BTL driver unit)
BTL driver (CH2) output -
BTL driver (CH2) output +
BTL driver (CH1) output -
BTL driver (CH1) output +
28 27 26
Vcc2 GND3
(REG GND)
(POW Vcc
(POW Vcc
CH5/6)
REG Vcc)
47k
23.5k
REG1 SW
23.5k
9 10 11
Pin No
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
25 24 23 23 21
CH4
Vcc3 Vcc1
(POW Vcc
CH1~4)
LD
CONT1
LD
CONT2
Level shift
47k
Level shift
23.5k
47k 47k
23.5k
CH2
GND1
12 13 14 15 16
Symbol Function
OUT3+ BTL driver (CH3) output +
OUT3- BTL driver (CH3) output -
OUT4+ BTL driver (CH4) output +
OUT4- BTL driver (CH4) output -
LDCONT2 Loading driver (CH6) voltage setting
LDCONT1 Loading driver (CH5) voltage setting
Vcc1 Supply voltage (BTL driver unnit)
Vcc3 Supply voltage (regulator unit)
GND3 REG GND (regulator unit)
Vcc2 Supply voltage (loading driver unit)
REG1OUT Regulator output 1
REG1 B Regulator 1 Tr base
REG2 B Regulator 2 Tr base
REG2OUT Regulator output 2
MUTE BTL drivermute terminal
OUT6+ Loading driver (CH6) output +
OUT6- Loading driver (CH6) output -
BIAS BIAS terminal
20 19
CH3
Level shift
Level shift
CH1
17 18