Hitachi DZ-GX20A Service Manual page 160

1 2
S-17 IC Block Diagrams-1/2
IC0501
F
MB39A115
-INE1 37
ERROR
VREF
AMP1 PWM
1µA
COMP.1
CS1 38
(1.0V)
FB1 36
E
-INE2 2
ERROR
VREF
AMP2 PWM
1µA
COMP.2
CS2 1
(1.23V)
FB2 3
DTC2 4
-INE3 18
ERROR
D VREF
AMP3 PWM
1µA COMP.3
CS3 19
1.23V
FB3 17
DTC3 16
-INE4 21
ERROR
VREF
AMP4 PWM
1µA
COMP.4
CS4 20
C
1.23V
FB4 22
DTC4 23
-INE5 26
ERROR
VREF
AMP5 PWM
1µA
COMP.5
CS5 27
1.23V
FB5 25
B
DTC5 24
SCP
VREF
COMP.
-INS 10
SCP
1V
CSCP 15
BIAS
CTL3 7 UVLO2
CH
CTL4 8 OSC VREF
CTL
UVLO1
CTL5 9
A
2.0V
12 13 11
RT CT VREF
1 2
3
<CH1>
-INE1 37
ERROR
VREF
AMP1
35 VCCO
DRIVE1-1 1µA
CS1 38
Pch 34 OUT1-1
(1.23V)
DRIVE1-2 FB1 36
Nch
33 OUT1-2 DTC2 35
<CH2>
-INE2 2
ERROR
VREF
AMP2
1µA
DRIVE2
CS2 1
Pch 32 OUT2
(1.23V)
FB2 3
DTC2 4
<CH3>
-INE3 18
ERROR
VREF
AMP3
DRIVE3
1µA
Pch
31 OUT3 CS3 19
1.23V
FB3 17
DTC3 16
<CH4>
-INE4 21
ERROR
VREF
AMP4
DRIVE4 1µA
CS4 20
Pch 30 OUT4
1.23V
FB4 22
DTC4 23
SCP
<CH5> VREF
COMP.
-INS 24
DRIVE5
1V
Pch 29 OUT5
CSCP 15
28 GND0
CTL1 7
CTL2 8 OSC
CH
CTL
CTL3 9
CTL4 10
12 13
ERROR AMP
SCP COMP. RT CT
5 VCC
ERROR AMP
1.23V
POWER
ON/OFF 6 CTL
VR
CTL
14
GND
3
4 5
IC0502
MB39A110
<CH1>
PWM
34 VCCO-P
COMP.1
DRIVE1-1
Pch 33 OUT1-1
25 VCCO-N
DRIVE1-2
Nch 32 OUT1-2
<CH2>
PWM
COMP.2
DRIVE2
Pch
31 OUT2-1
DRIVE1-2
Nch 30 OUT2-2
<CH3>
PWM
COMP.3
DRIVE3
Pch 27 OUT3
<CH4>
PWM
COMP.4
DRIVE4
Pch 26 OUT4
29 GND01
28 GND02
SCP
ERROR AMP POWER SUPPLY
SCP COMP POWER SUPPLY
5 VCC
ERROR AMP
REFERENCE
1.23V
BIAS
UVLO
POWER
ON/OFF 6 CTL
VREF VR
CTL
2.0V
11 14
VREF GND
4 5
S - 15
6 7
IC0503,
IC0504
TK11215CMC
NJM13404R-TE1
V IN V OUT
6 4
1
OVER
CONT.
CURRENT
PROTECT 2
3
4
VREF
SN74AHC1G66HDCK
1
1 2 3
CTL GND NP
4
IC0505
TK72175CM
NJM13403V-TE1
1 4
1
2
3 VREF
6
3
OVER
SW
CURRENT
4
CONT
PROTECT
5
5
6
7
6 7
8
IC1302,
IC1306 F
VDD 8
7
A
B
6
VSS 5
IC1303
E
GND 3
2
VCC 5
IC1305
14
D
A
D
13
12
V+
GND 11
10
9
B C
8
C
B
A
8