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1FEATURES

? 3 V to 6 V Input Voltage Range

? Boost Converter With 4 A Switch Current Limit

? Boost Converter Output Voltages up to 18 V

? Boost Converter Overvoltage Protection

? Selectable Switching Frequency (640 kHz or

1.2 MHz)

? Programmable Boost Converter Soft-Start

? Temperature-Compensated Positive Charge

Pump Controller

? Negative Charge Pump Controller

? Eight Channel Level Shifter

? Two Panel Discharge Signals

? XAO Reset Signal

? Digitally Programmable VCOM Buffer

? Thermal Shutdown

? 56-Pin 7×7 mm QFN Package

APPLICATIONS

? LCD Monitors using ASG/GIP Technology

DESCRIPTION

The TPS65149 provides a highly integrated LCD bias

solution, primarily intended for monitor applications

using ASG/GIP technology.

The device integrates a boost converter to generate

the source driver supply voltage (VAVDD), positive and

negative charge pump controllers to generate gate

driver ON (VGH) and OFF (VGL) voltages, a

programmable VCOM generator, and an 8-channel

level shifter in a single IC. The positive charge pump

controller supports temperature compensation to

reduce VGH at high temperatures.

In addition to the above functions, the TPS65149 generates two signals to discharge the display panel

during power-down, plus an additional active-low

XAO reset output.

Supply sequencing during power-up can be controlled

by an externally generated enable signal.