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LCD Bias with Digital VCOM Buffer for Notebook PCs and Tablet PCs

Availability: 5,985


Package | PIN: WQFN (RHR) | 28
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $2.97
10-24 $2.67
25-99 $2.49
100-249 $2.18
250-499 $2.05
500-749 $1.74
750-999 $1.47
1000+ $1.40


  • 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
  • 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

Texas Instruments  TPS65640RHRR

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.