F
Semiconductor
S6520
LCD Back Light Inverter with Analog Dimming
Description
The S6520 contains all of the necessary control circuitry to implement a highly efficient
cold cathode fluorescent back-light driver and provides a near sinusoidal output voltage
and current waveforms for a CCFL. A specially designed integrated circuit provides all
control functions for a current fed push-pull converter and contains two PWM(Pulse Width
Modulation) control circuits to drive 4 CCFLs for LCD monitor. The S6520 operates at
constant frequency in a PWM mode and it has feed forward control method, this function
preventing lamp flickering against input voltage step changing. Therefore, even though
input voltage is changed suddenly, the lamp current remains constant because of the feed
back and feed forward control. Typical operating frequency ranges between 30kHz to
200kHz, dependent upon the CCFL and transformer characteristics. It provides protection
functions such as OLP(Open Lamp Protection), SCP(Short Circuit Protection).
Features
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Complete Dual PWM Power Control Circuitry
Internal Soft Start for Soft Lamp lgnition
Enable Function to lock the output off until Out Signal is Operational
Analog Dimming Function
Internal Stable 5V Reference Supply
Open Lamp Protection
Internal Short Circuit Protection
Ordering Information
Type NO.
S6520
Marking
S6520
Package Code
SOP-16
Outline Dimensions
unit :
mm
KSI-8019-000
1
AUK [ AUK CORP ]
