Sony HAP-S1 Service Manual page 78

HAP-S1
• IC Block Diagrams
– MAIN Board –
IC201 BU33TD3WG-TR
VIN 1
VOLTAGE
–
REFERENCE
+
5 VOUT
OVER CURRENT
PROTECTION
GND 2
4 NC
THERMAL
SHUTDOWN
STANDBY
STBY 3
IC202 BD9329AEFJ-E2
BST 1 VREG
OSC
OVER CURRENT
VIN 2
PROTECT
IBIAS
UNDER VOLTAGE
LVS S
LOCK OUT
THERMAL
DRIVE
SW 3 SLOPE
SHUTDOWN
LOGIC
LVS R PWM
GND 4
HAP-S1
VCC
8 SS
VREF 7 EN
SOFT
START
6 COMP
5 FB
ERROR
AMP
IC203 TPS54295PWPR
VREG5
VIN1 1
VBST1 2
XCON
SW1
3
CH1 MIN-OFF
TIMER
PGND1 4
ZC1
PGND1 REF_OCL
+
SW1 SW1
EN1 5 EN LOGIC
SS1 6
32%
+
UV UV1
OV OV1
+
+20%
EN LOGIC
ERR COMP
REF1
+
+
SS1
VFB1 7
PGND
GND 8
IC204 MM3464A33NRE
VDD 1
GND 2
+
VOLTAGE
REFERENCE
CE 3 BIAS
78 78
VREG5
CONTROL CONTROL
LOGIC LOGIC
XCON
CH2 MIN-OFF
TIMER
OCP1 OCP2 ZC2
REF_OCL
+ +
SW2
32%
SOFT START +
UV1
UV2 UV
UV2
OV1 PROTECTION
SS1 SS2
LOGIC
OV2
OV2 OV
+
UVLO +20%
TSD
ERR COMP
REF2
+
+
SS2
REF1
REF
PGND
REF2
5V REG VIN1
VREG5
UVLO
5 VOUT
CURRENT
LIMIT
4 NC
16 VIN2
15 VBST2
14 SW2
13 PGND2
PGND2
+
SW2
12 EN2
11 SS2
10 VFB2
9 VREG5