TPS65146

ACTIVE

3-CH LCD Bias w/ LDO, GPM, VCOM Buffer & Reset IC 

Product details

Display type LCD unipolar IC integration LCD bias, VCOM Vin (min) (V) 2.5 Vin (max) (V) 6 Applications 13 to 21 inches Source driver voltage (min) (V) 7 Source driver voltage (max) (V) 16.5 Level shifter/scan driver (Ch) 0 Features GPM or GVS, Output discharge, Reset generator, VCOM or op amp Topology Boost Rating Catalog Operating temperature range (°C) -40 to 85
Display type LCD unipolar IC integration LCD bias, VCOM Vin (min) (V) 2.5 Vin (max) (V) 6 Applications 13 to 21 inches Source driver voltage (min) (V) 7 Source driver voltage (max) (V) 16.5 Level shifter/scan driver (Ch) 0 Features GPM or GVS, Output discharge, Reset generator, VCOM or op amp Topology Boost Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RGE) 24 16 mm² 4 x 4
  • 2.5V to 6.0V Input Voltage Range
  • 16.5V Boost Converter With 2A Switch Current
  • 650kHz/1.2MHz Selectable Switching Frequency
  • Adjustable Soft-Start for the Boost Converter
  • 500mA LDO
  • Reset Function (XAO Signal)
  • Regulated VGH
  • Gate Voltage Shaping
  • VCOM Buffer
  • LCD Discharge Function
  • Overvoltage Protection
  • Thermal Shutdown
  • Undervoltage Lockout
  • 24-Pin 4×4mm QFN Package
  • APPLICATIONS
    • Notebook PC
    • Monitor
  • 2.5V to 6.0V Input Voltage Range
  • 16.5V Boost Converter With 2A Switch Current
  • 650kHz/1.2MHz Selectable Switching Frequency
  • Adjustable Soft-Start for the Boost Converter
  • 500mA LDO
  • Reset Function (XAO Signal)
  • Regulated VGH
  • Gate Voltage Shaping
  • VCOM Buffer
  • LCD Discharge Function
  • Overvoltage Protection
  • Thermal Shutdown
  • Undervoltage Lockout
  • 24-Pin 4×4mm QFN Package
  • APPLICATIONS
    • Notebook PC
    • Monitor

The TPS65146 offers a very compact power supply solution designed to supply the LCD bias voltages required by TFT (Thin Film Transistor) LCD panels running from a typical 3.3 V or 5 V supply rail. The device integrates a step-up converter for VS (Source Driver voltage), a positive charge pump regulator for VGH (Gate Driver High voltage), a logic voltage rail using an integrated LDO and a Vcom buffer driving the LCD backplane. In addition to that, a gate voltage shaping block is integrated for VGH, modulating the signal (into VGHM) with high flexibility by using a logic input VFLK and an external discharge resistor connected to RE pin. Also, an external discrete negative charge pump can be set using the boost converter of the TPS65146 to generate VGL (Gate Driver Low voltage). The integrated reset function together with the LCD discharge function available in the TPS65146 provide the signals enabling the discharge of the LCD TFT pixels when powering-off. The device includes safety features like overvoltage protection (OVP), as well as thermal shutdown.

The TPS65146 offers a very compact power supply solution designed to supply the LCD bias voltages required by TFT (Thin Film Transistor) LCD panels running from a typical 3.3 V or 5 V supply rail. The device integrates a step-up converter for VS (Source Driver voltage), a positive charge pump regulator for VGH (Gate Driver High voltage), a logic voltage rail using an integrated LDO and a Vcom buffer driving the LCD backplane. In addition to that, a gate voltage shaping block is integrated for VGH, modulating the signal (into VGHM) with high flexibility by using a logic input VFLK and an external discharge resistor connected to RE pin. Also, an external discrete negative charge pump can be set using the boost converter of the TPS65146 to generate VGL (Gate Driver Low voltage). The integrated reset function together with the LCD discharge function available in the TPS65146 provide the signals enabling the discharge of the LCD TFT pixels when powering-off. The device includes safety features like overvoltage protection (OVP), as well as thermal shutdown.

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TPS65149 ACTIVE LCD Bias Solution For LCD Panels Using ASG/GIP Technology This product has no LDO, adds an 8 ch level shifter and has programmable Vcom & Vgl.

Technical documentation

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Type Title Date
* Data sheet Compact LCD Bias IC for Notebook & Monitor with LDO, VCOM Buffer and Reset IC datasheet (Rev. A) 16 Jun 2009
Application note Understanding Undervoltage Lockout in Power Devices (Rev. A) 19 Sep 2018
Application note Generation of a VCOM buffer input using PWM signal 21 Dec 2015
Application note Minimizing Ringing at the Switch Node of a Boost Converter 15 Sep 2006

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VQFN (RGE) 24 View options

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