Product details


Display type LCD Unipolar IC integration LCD Bias, LCD Level shifter, VCOM Vin (Min) (V) 3 Vin (Max) (V) 6 Source driver voltage (Min) (V) 7 Source driver voltage (Max) (V) 18 Level shifter/scan driver (ch) 8 Special function VCOM/OpAmp, I2C I/F, Output Discharge, Reset Generator, Level Shifter, Temperature Sensor/Compensation Topology Type Rating Catalog open-in-new Find other LCD & OLED display power & drivers

Package | Pins | Size

VQFN (RSH) 56 49 mm² 7 x 7 open-in-new Find other LCD & OLED display power & drivers


  • 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
    • LCD Monitors using ASG/GIP Technology

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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.

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Similar but not functionally equivalent to the compared device:
TPS65155 ACTIVE LCD Bias Solution with Level Shifters for GOA Panels This product has no Vcom, and has a 6ch level shifter (instead of 8).

Technical documentation

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Type Title Date
* Datasheet TPS65149 LCD Bias Solution for LCD Monitors – request datasheet datasheet Aug. 19, 2010
Application notes Understanding Undervoltage Lockout in Power Devices (Rev. A) Sep. 19, 2018
Technical articles A New Understanding: Blast Motion redefines movement, tracking and training for athletes. Aug. 06, 2014
Technical articles Improving Fly-Buck Regulation Using Opto (Part-1) Jul. 15, 2014
Technical articles Altium and WEBENCH – together at last Jul. 12, 2014
Technical articles Using telemetry in point-of-load applications Jun. 24, 2014
Application notes Minimizing Ringing at the Switch Node of a Boost Converter Sep. 15, 2006

Design & development

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