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.