Sony HAP-S1 - Page 78

HAP-S1
HAP-S1
7878
• IC Block Diagrams
– MAIN Board –
IC201 BU33TD3WG-TR
2GND
1VIN
VOUT5
VOLTAGE
REFERENCE
3STBY
NC
4
STANDBY
OVER CURRENT
PROTECTION
THERMAL
SHUTDOWN
+
–
VREFOSC
IBIAS
SLOPE
UNDER VOLTAGE
LOCK OUT
ERROR
AMP
DRIVE
LOGIC
S
R PWM
THERMAL
SHUTDOWN
LVS
LVS
OVER CURRENT
PROTECT
VREG
VCC
SOFT
START
BST 1
VIN
2
SW
3
GND
4
EN
7
FB
5
COMP6
SS
8
IC202 BD9329AEFJ-E2
IC203 TPS54295PWPR
IC204 MM3464A33NRE
VIN216
VBST2
15
SW2
14
PGND2
13
EN2
12
SS211
VFB2
10
VREG5
9
VIN1
1
VBST1
SW1
2
3
PGND1
4
EN1
5
SS1
VFB1
6
7
GND
8
VREG5VREG5
PROTECTION
LOGIC
+

CH1 MIN-OFF
TIMER
+
+

REF2
PGND2
SW2
+

REF_OCL
SW2
SS2
ERR COMP

+
+

+20%
32%
UVUV2
ZC2ZC1
OCP2OCP1
OVOV2
CH2 MIN-OFF
TIMER
+

+
+

REF1
PGND1
PGND PGND
VIN1
CONTROL
LOGIC
CONTROL
LOGIC
SW1
+

REF_OCL
XCON XCON
SW1
SS1
UV1
UV2
OV1
OV2
UVLO
TSD
ERR COMP

+
+

+20%
32%
UV UV1
OV OV1
SS1 SS2
EN LOGIC
5V REG
EN LOGIC
SOFT START
REF1
REF2
REF
UVLO
VREG5
VOUT
5
NC
4
CE 3
GND
2
VDD 1
+

VOLTAGE
REFERENCE
CURRENT
LIMIT
BIAS