GENERAL DESCRIPTION

The ADD8754 is optimized for use in TFT LCD applications, requiring only external charge pump components to provide all the requirements for panel power, VCOM, and gate modulation. Included in a single chip are a high frequency step-up dc-to-dc switching regulator, logic voltage regulator, VCOM amplifier, and gate pulse modulation circuitry.

FEATURES

Step-up switching regulator with 2 A power switch

650 kHz or 1.2 MHz switching frequency

Output adjustable to 20 V

350 mA logic voltage regulator

Selectable output voltages: 2.5 V, 2.85 V, 3.3 V

VCOM amplifier with 300 mA drive

Gate pulse modulation circuitry

Independently adjustable delay and falling slope

General

3 V to 5.5 V input

Undervoltage lockout

Thermal shutdown

24-lead, Pb-free LFCSP package

APPLICATIONS

TFT LCD panels for monitors, TVs, and notebooks