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Product details

Parameters

Display type LCD Bipolar, LCD Unipolar IC integration LCD Bias, VCOM Vin (Min) (V) 2.5 Vin (Max) (V) 5.5 Source driver voltage (Min) (V) -8 Source driver voltage (Max) (V) 12.7 Level shifter/scan driver (ch) 0 Special function Adjustable Sequencing, GPM/GVS, I2C I/F, Output Discharge, Reset Generator, Temperature Sensor/Compensation, VCOM/OpAmp Topology Rating Catalog open-in-new Find other LCD & OLED display power & drivers

Package | Pins | Size

WQFN (RHR) 28 19 mm² 5.5 x 3.5 open-in-new Find other LCD & OLED display power & drivers

Features

  • 2.5V to 5.5V Input Voltage Range
  • 3.6 to 12.7V Boost Converter (AVDD)
  • 15 to 37V Boost Converter with Temperature
    Compensation (VGH)
  • –8V to –3.8V Linear Negative Voltage Regulator
    (VGL or NAVDD)
  • 1.5V to 3V Alternative Buck Converter or
    Low Dropout Regulator (V25)
  • 7 bits Programmable VCOM Calibrator with one
    Integrated Buffer Amplifiers
  • 0.8V to 5.1V Programmable VCOM Voltage Output
    for Full AVDD Application
  • –4.1V to 0.2V Programmable VCOM Voltage
    Output for Positive and Negative AVDD Application
  • Two Operational Amplifiers
  • Gate Voltage Shaping
  • Programmable VGH and VCOM Temperature
    Compensation
  • TCON Reset Signal Generator with Programmable delay
  • I2C Interface for E2PROM Programming
  • Thermal shutdown
  • Supports GIP and non-GIP displays
  • 28 pins 5.5mm×3.5mm 0.5mm pitch QFN
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Description

The TPS65640 is a compact LCD bias solution primarily intended for use in Notebook and Tablet PCs. The device comprises two boost converters to supply the LCD panel’s source driver and gate driver/level shifter; one buck converters or a LDO regulator alternatively to supply the time controller logic voltages; a linear negative voltage regulator to supply gate off voltage or provide negative voltage for source driver; a programmable VCOM generator with one high-speed amplifier; a gate voltage shaping function and two high speed operational amplifiers.

All the regulators and VCOM voltage outputs are programmed through I2C interface and stored in the TPS65640 integrated E2PROM. The TPS65640 is available in 5.5mm × 3.5mm, 28 Leads QFN package.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 9
Type Title Date
* Datasheet LCD Bias with Digital-VCOM Buffer for Notebook PCs and Tablet PCs datasheet (Rev. A) Nov. 15, 2013
Application notes Understanding Undervoltage Lockout in Power Devices (Rev. A) Sep. 19, 2018
Application notes Basic Calculation of a Buck Converter's Power Stage (Rev. B) Aug. 17, 2015
Application notes Basic Calculation of a Boost Converter's Power Stage (Rev. C) Jan. 08, 2014
Technical articles Don’t underestimate the power of an LDO Oct. 19, 2013
Technical articles How to optimize your DSP power budget Oct. 03, 2013
Technical articles "X" Marks the spot - 7 Treasures in a pirate engineer's treasure chest Sep. 19, 2013
Technical articles Power Tips: How to be discrete Sep. 17, 2013
Application notes Minimizing Ringing at the Switch Node of a Boost Converter Sep. 15, 2006

Design & development

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CAD/CAE symbols

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WQFN (RHR) 28 View options

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