Sony STR-DA2800ES Service Manual page 133

IC1408 TPS54425PWPR
–35% +
UV
–
+
OV
–
+20%
VO 1
VFB 2
VCC
VREG5
VREG5 3
UVLO
SOFT
SS
SS 4
START
REF
GND 5
PG 6
OCP
EN
EN 7
LOGIC
IC1410 BD9009HFP-TR
VIN 1
VREF
INTERNAL
BIAS
SW 2
FB 3
SSH
SOFT
START
GND 4
ERROR
AMP
INV 5 –
+
+
SLOPE
SYNC
RT 6
EN/SYNC 7
REF
+
SS + PWM
–
CONTROL
LOGIC
1 SHOT
REF
+
+ REF
ZC
–
– –10%
+
OCP
–
PWM
COMPARATOR
–
RESET
+
COUNTER
TIMER
SET
OSC
14 VIN2
VREG5
13 VIN1
12 VBST
11 SW2
10 SW1
XCON
VREG5
9 PGND2
8 PGND1
SW
UV
PGND
OV PROTECTION
LOGIC
UVLO
SW
TSD
PGND
CURRENT
LIMIT
+
–
SDWN
DRIVER
DRV
SDWN
UVLO/
TSD
STR-DA2800ES
133