Sony STR-DA2800ES Service Manual page 132

STR-DA2800ES
– DCDC Board –
IC1402, 1404 – 1406 TPS54331GDR
BOOT 1
BOOT THERMAL
CHARGE SHUTDOWN
VIN 2
SHUTDOWN
LOGIC
EN 3
SS 4
IC1403 TPS54325PWPR
VREG5
-30%
VO 1
+20%
REF
VFB 2
VREG5 3
SS 4
SOFT START
GND 5
PG 6
EN
EN 7
LOGIC
IC1407 S-80929CNMC-G8ZT2G
OUT 1
VDD 2
–
+
VREF
VSS 3
132
ENABLE
COMPARATOR
ENABLE THRESHOLD
12 A/V
CURRENT
SENSE
REF REF
VREG5
UV
UVLO
PROTECTION
OV
LOGIC
TSD
PWM
+
+ CONTROL
LOGIC
REF
-10%
OCP
5 CD
DELAY
CIRCUIT
4 NC
BOOT
UNDERVOLTAGE
LOCKOUT
MAXIMUM CLAMP
PWM
LATCH
S
GATE
COMPARATOR
DRIVE
LOGIC
Q R
SLOPE
COMPENSATION
FREQUENCY
OSCILLATOR
SHIFT
14 VCC
VREG5
13 VIN
12 VBST
11 SW2
10 SW1
XCON
VREG5
9 PGND2
8 PGND1
MAXIMUM
CLAMP
DISCHARGE
LOGIC
ECO-MODE
VOLTAGE
REFERENCE
PWM
+
+
–
ERROR
AMPLIFIER
8 PH
7 GND
6 COMP
5 VSENSE