Sony HBD-E280 - Page 56

HBD-E280/T28
56
IC308 TPS54225PWPR
VFB
2
VREG5
3
VO
1
14 VCC
13 VIN
UNDERVOLTAGE
LOCKOUT
EN
LOGIC
PROTECTION
LOGIC
12 VBST
11 SW2
10 SW1
9 PGND2
8 PGND1
+
+

REFERENCE
SOFTSTART
VREG5
+

SS
4
GND
5
PG
6
EN
7
UVLO
TSD
XCON
CONTROL
ROGIC
PWM
OCP
IC309 MM1855AHBE IC601, 603, 5705, 6205 BD00GC0WEFJ-SE2
41 2 3
CN
VO
N.C.
GND
REFERENCE
BIAS
CURRENT
LIMITTER
DRIVER
THERMAL
SHUTDOWN
8
VIN
7
N.C.
6
N.C.
5
CONT
578
2
1 3
VOUT
FB
GND
4
N.C.
VCC N.C.
6
N.C. EN
+
SOFT
TSD
OCP
IC705, 5908 TK11150CSCL-G
IC5905 TK11190CSCL-G
CONTROL
CIRCUIT
BANDGAP
REFERENCE
+
–
OVER HEAT &
OVER CURRENT
PROTECTION
1
VCONT
3
NP
2
GND
4
VOUT
5
VIN