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Product details

Parameters

Display type LCD Unipolar IC integration LCD Bias, LED Backlight, VCOM Vin (Min) (V) 2.3 Vin (Max) (V) 6 Source driver voltage (Min) (V) 7 Source driver voltage (Max) (V) 16.5 Level shifter/scan driver (ch) 0 Special function Output Discharge, VCOM/OpAmp, GPM/GVS, Reset Generator, Backlight Driver Topology Type Rating Catalog open-in-new Find other LCD & OLED display power & drivers

Package | Pins | Size

WQFN (RTG) 32 18 mm² 6 x 3 open-in-new Find other LCD & OLED display power & drivers

Features

  • Integrated Bias and Backlight Power
  • 2.3-V to 6-V Input Voltage Range for Bias
    • Up to 16.5 V Boost Converter with 1.8-A
      Switch Current
    • 1.2-MHz / 650-kHz Selectable Switching
      Frequency
    • Internal Compensation
    • Internal Soft-start at Power on
    • Reset Function (XAO Signal)
    • Regulated VGH
    • Regulated VGL
    • Gate Voltage Shaping
    • LCD Discharge Function
  • 150-mA Unity Gain VCOM Buffer
  • 4.5-V to 24-V WLED Backlight Input Range
    • Integrated 1.5-A / 40-V MOSFET
    • Boost Output Tracks WLED Voltage
    • Internal Compensation
    • External Current Setting Input
    • 6 Current-Sink Channels of 25 mA
    • Better than 3% Current Matching
    • Up to 1000:1 PWM Dimming Range
  • Overvoltage Protection
  • Thermal Shutdown
  • Undervoltage Lockout
  • 32-Pin 6 mm × 3 mm QFN Package
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Description

The TPS65142 provides a compact solution to the bias power and the WLED backlight in note-pc TFT-LCD panels. The device features a boost converter, a positive charge pump regulator, and a negative charge pump regulator to power the source drivers and the gate drivers. A 150 mA unity-gain high-speed buffer is offered to drive the VCOM plane. Gate voltage shaping and the LCD discharge function are offered to improve the image quality. A reset function allows a proper reset of the TCON at the power on. The TPS65142 also offers the complete solution to driver up to 6 chains of WLEDs with 1000:1 ratio PWM dimming.

All features are integrated in a compact 6 × 3 mm2 Thin QFN package.

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Similar but not functionally equivalent to the compared device:
TPS65154 ACTIVE LCD Bias IC with Integrated WLED Driver This product adds a programmable Vcom calibrator and LDO for Vcc, with an LED current of 30mA instead of 25mA.

Technical documentation

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Type Title Date
* Datasheet TPS65142 LCD Bias Power Integrated with WLED Backlight Drivers datasheet (Rev. B) Aug. 14, 2015
Application notes Understanding Undervoltage Lockout in Power Devices (Rev. A) Sep. 19, 2018
Application notes Generation of a VCOM buffer input using PWM signal Dec. 21, 2015
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 Basic Calculation of a Boost Converter's Power Stage (Rev. C) Jan. 08, 2014
Application notes TPS65142 Loop Compensation Design Consideration Jul. 02, 2013

Design & development

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WQFN (RTG) 32 View options

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