Denon S-81 Service Manual page 45

SPI-8002TW (IC901 : 1U-3762)
1
AGND
V
IN1
V
CC
SW
OUT1
DGND1
SS1
V
REF1
NC 8
3
V
14
Start
C/E
6 SS1
7
V
REF1
f down
cut
11 SS2
10
V
REF2
AGND
SPI-8001TW/SPI-8002TW
CC
3V
V PReg
REF
1V
f down
cut
3V
+
+
Ð
Ð
Amp
Buffer-Amp
AGND
3V
+
+
Ð
Ð
Amp
Buffer-Amp
16 NC
V
IN2
C/E
SW
OUT2
DGND2
SS2
V
REF2
AGND
9
OSC fdown TSD
RESET RESET
PWM
Drive
Logic
+
Ð
Ð
PWM
PWM
Drive
Logic
+
Ð
Ð
PWM
AGND
45
S-81/S-81DAB
UVLO
V
2
IN1
OCP
SW
4
OUT1
DGND1
5
15
V
IN2
OCP
SW
13
OUT2
12
DGND2