FAN7548 데이터 시트보기 (PDF) - Fairchild Semiconductor

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FAN7548

Dual LCD Back Light Inverter Drive IC

Fairchild Semiconductor 

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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