Sanyo LCD-32XH3 Service Manual page 10

IC Block Diagrams
IC601 < Transition-mode PFC Controller > L6562D
1
INV
VOLTAGE OVERVOLTAGE
REGULATOR
UNTERNAL
8
Vcc
SUPPLY 7V
R1
25V
+
V
R2
REF2
2.1V
1.6V
6
5
GND
ZCD
(Zero Current Detector)
IC602 MR4010-7101
Latch circuit
reset comparator
+
OVP
V
UL
comparator
+
V
OVP
Thermal Shutdown
Circuit
1 Zero Current
Z/C
Detection Circuit
(Zero Current
Detection
Turn-on
Terminal)
Dead Timer
Standby
Circuit
Vref
I
F/B
2
F/B
(Feed Back
Terminal)
On width
Timer
(On the ASSY, PWB, POWER)
COMP
MULT
2
3
MULTIPLIER AND
THD OPTIMIZER
+
DETECTION
R Q
S
UVLO
Start
stop
ZERO CURRENT
+ DETECTOR
STARTER
DISABLE
VCC
4
UVLO Start-up circuit
comparator UVLO comparator
+ +
Vcc(start)
Vcc(start-up off)
/Vcc(stop)
/Vcc(start-up on)
R
Q
+
S
S
Q
R
OCP threshold compatator
+
V
TH (OCL)
Burst mode OCP
threshold compatator
+
+
V
TH (Burst Limit)
3
GND
CS
4
40K
5µF
Vcc
15V
7 GD
DRIVER
VIN
Collector
7 9
Start-up
Circuit
Q1
Soft Drive
Circuit
Re-start
Timer
5
Emitter/OCL
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