LG Flatron L1918S

12
BLOCK DIAGRAM-POWER
Power
Inverter
EMI filter
Rectification
Transformer
5V/12V
output OVP
Feedback
control
circuit
Switching
circuit (PWM
control IC &
MOSFER)
OVP protect
circuit
Diode
rectifier
Starting
resistor
12V
Rush
prevention
ON/OFF
DIM
Push-pull
circuit
Transformer
conversion
LC resonance
VDDA
ON/OFF circuit
PWM IC
OZ9938GN
Feedback
circuit
OVP circuit
4 CCFL lamps
Sampling
Lamp open
protection
DIM circuit
12V
5V
100~240V