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FAN7548-FAN7548G-FAN7548GX
CCFL BACK LIGHT IC
Features Backlight Lamp Ballast and Soft Dimming Reduce the Number of Components Wide Range Operating Voltage 9-30V Precision Voltage Reference Trimmed to 3.4% Low Standby Current (Typ. 150uA) Soft Start Function
•Dual PWM Control Analog & Burst Dimming Function P-Channel MOSFET Drive Open Lamp Regulation(OLR) Open Lamp Protection(OLP) Buck+Royer Topology 20 SSOP
DescriptionThe FAN7548 provides the necessary circuit blocks to
implement a highly efficient CCFL backlight power supply
in a small footpirnt 20 SSOP package. The device features
two control stages for operating independent resonant tanks
for multi-lamp designs.
External parts count is minimized and system cost is reduced
by integration such features as a feedback controlled PWM
driver stage, the soft start, the open lamp regulation, the open
lamp protection, the UVLO, and the self-synchronization
circuitry between the buck and Royer stages. It includes an
internal shunt regulator, allowing it to operate with input
voltage from 9 to 30V. It supports analog and burst dimming
modes of operation. It providees the open lamp regulation,
and the open lamp protection.
