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FAN7548 Datasheet, PDF (1/12 Pages) Fairchild Semiconductor – Dual LCD Back Light Inverter Drive IC | |||
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www.fairchildsemi.com
FAN7548
Dual LCD Back Light Inverter Drive 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
Description
The 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.
20-SSOP
1
©2003 Fairchild Semiconductor Corporation
Rev. 1.0.0
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