Inicio Administración de potencia Controladores y alimentación para pantallas LCD y OLED
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Administración de potencia
Controladores y alimentación para pantallas LCD y OLED

TPS65146

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TPS65146

ACTIVO
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Detalles del producto

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 mm × 4 mm)
  • 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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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos Compact LCD Bias IC for Notebook & Monitor with LDO, VCOM Buffer and Reset IC datasheet (Rev. A) 16/06/2009
Nota sobre la aplicación Understanding Undervoltage Lockout in Power Devices (Rev. A) 19/09/2018
Nota sobre la aplicación Generation of a VCOM buffer input using PWM signal 21/12/2015
Nota sobre la aplicación Minimizing Ringing at the Switch Node of a Boost Converter 15/09/2006

Diseño y desarrollo

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VQFN (RGE) 24 Ultra Librarian
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