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TPS65148 - Compact TFT LCD Bias IC

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General Description

The TPS65148 offers a compact power supply solution designed to supply the LCD bias voltages required by TFT (Thin Film Transistor) LCD panels running from a typical 5 V supply rail.

The device integrates a high power step-up converter for VS (Source Driver voltage), an accurate voltage rail using an integrated LDO to supply the Gamma Buffer (VREG_O) and a Vcom buffer driving the LCD backplane.

In addition to that, a gate voltage shaping block is integrated.

Overview

TPS65148 www.ti.com SLVS904A – MAY 2009 – REVISED JANUARY 2011 Compact TFT LCD Bias IC for Monitor with VCOM Buffer, Voltage Regulator for Gamma Buffer and Reset Function Check for Samples:.

Key Features

  • 1.
  • 2.5V to 6V Input Voltage Range.
  • Up to 18V Boost Converter With 4A Switch Current.
  • 630kHz/1.2MHz Selectable Switching Frequency.
  • Adjustable Soft-Start for the Boost Converter.
  • Gate Driver for External Input-to-Output Isolation Switch.
  • 0.5% Accuracy Voltage Regulator for Gamma Buffer.
  • Gate Voltage Shaping.
  • VCOM Buffer.
  • Reset Function (XAO Signal).
  • LCD Discharge Function.
  • Overvoltage Protection.

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