Description Of Major Ics - JVC XL-PM11 Service Manual

Description of major ICs

BH6508FS (IC6508) : Motor driver
1. Block diagram
32 31 30 29
CLK
20K
20K
3.75K
LOGIC 4
SAW
OSC
LOGIC 1
+ -
CT
1 2 3 4
2. Pin function
Pin No. Symbol
1 MUTE 4 Mute terminal
2 CT Triangular wave output terminal
3 IN 1 CH1 Control signal input terminal
4 CN 1 CH1 Feedback filter terminal
5 POWGND 1 Ground for power and analog block
6 OUT_IF CH1 Non-inverted output terminal
7 POWVCC 1 Vcc for power block
8 OUT_1R CH1 Inverted output terminal
9 POWGND12 Ground for power block
10 OUT_2R CH2 Inverted output terminal
11 POWVCC2 Vcc for power block
12 OUT_2F CH2 Non-inverted output terminal
13 POWGND 2 Ground for power and digital block
14 CN 2 CH2 Feedback filter terminal
15 IN 2 CH2 Control signal input terminal
16 VREF Reference voltage input terminal
Note: Nin-inverted output and inverted output if driver are the polarity to an input terminal.
28 27 26 25
F R
NF
Amp.
H BRIDGE 4
PRE
DRIVER 4
PRE
DRIVER 1
H BRIDGE 1
NF
Amp.
F R
5 6 7
Function
24 23 22
R F
H BRIDGE 3
PRE
DRIVER 3
PRE
DRIVER 2
H BRIDGE 2
1 0 1 1
8 9
Pin No. Symbol
17 VCC
18 VG
19 IN3
20 CN3
21 POWGND3
22 OUT_3F
23 POWVCC3
24 OUT_3R
25 POWGND34
26 OUT_4R
27 POWVCC4
28 OUT_4F
29 CN4
30 IN4
31 POWGND4
32 CLK
XL-PM11/XM-PM1
21 20 19 18
VG
20K
NF
Amp.
Thermal
1K 20K
shut down
- +
LOGIC 3
LOGIC 2
- +
20K
1K
NF
Amp.
20K
1 2 1 3 1 4 1 5
Function
Control circuit power supply
Pre-drive circuit power supply
CH3 Control signal input terminal
CH3 Feedback filter terminal
Ground for power block
CH3 Non-inverted output terminal
Vcc for power block
CH3 inverted output terminal
Ground for power block
CH4 inverted output terminal
Vcc for power block
CH4 Non-inverted output terminal
CH4 Feedback filter terminal
CH4 Control signal input terminal
Ground for power block
External clock input terminal
17
VCC
VREF
1 6
1-9