Sony HBD-E280 - Page 55

HBD-E280/T28
55
• IC Block Diagrams
– MB-141 Board –
IC303 MM3404A50URE
IC305, 5303 MM3404A33URE
VOUT3
CE 1
GND
2
VDD
4
+
–
VOLTAGE
REFERENCE
CURRENT
LIMIT
BIAS
IC304, 702 MM3404Z11NRE
IC307, 5301, 5307 BD9329EFJ-BVE2
VOUT
5
NC
4
CE 3
GND
2
VDD 1
+

VOLTAGE
REFERENCE
CURRENT
LIMIT
BIAS
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
COMP
6
SS
8