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Product details

Parameters

Display type LCD unipolar IC integration LCD bias Vin (Min) (V) 8 Vin (Max) (V) 14.7 Source driver voltage (Max) (V) 19 Level shifter/scan driver (ch) 0 V_POS (Max) (V) 34 V_NEG (Max) (V) -2 Special function VCOM or op amp Topology Boost, Buck Rating Catalog open-in-new Find other LCD & OLED display power & drivers

Package | Pins | Size

VQFN (RGZ) 48 49 mm² 7 x 7 VQFN (RGZ) 48 49 mm² 7.0 x 7.0 open-in-new Find other LCD & OLED display power & drivers

Features

  • 8-V to 14.7-V Input Voltage Range
  • 500 kHz / 750 kHz Fixed Switching Frequency
  • Boost Output Voltage up to 19 V
    • 1%-Accurate Boost With 2.8-A Switch Current Overvoltage Protection
  • Input-to-Output Isolation Switch for Vs Short-Circuit protection for Boost
  • 2.5-A Step-Down Converter
  • Regulated Positive Charge-Pump Driver VGH
  • Regulated Negative Charge-Pump Driver VGL
  • Gate Voltage Shaping for VGH
  • Soft Start for all Converters
  • Two Integrated High-Speed Opamps
    • 50-MHz, 3-dB Bandwidth
    • Slew Rate 55 V / µs
    • 215-mA Short-Circuit Current
  • 48 Pin 7x7 mm QFN Package
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Description

The TPS65162 is a compact LCD bias IC with two high-speed operational amplifiers for the Vcom supply. The high current capability of the device is ideal for large LCD-monitor and LCD-TV applications.

The TPS65162 generates all four voltage rails for a TFT LCD (Vs, Vlogic, VGH and VGL) and includes two op-amps to generate the VCOM supply rail. An input-to-output isolation switch is integrated into the device, providing short-circuit protection for the boost converter. A current-limit function is implemented in the input-to-output isolation switch to allow soft turn-on during start-up. The device also features gate voltage shaping for improved TFT-LCD picture quality. The device consists of a boost converter to provide the source voltage Vs, and a step-down converter to provide the logic voltage for the system. A positive and a negative charge-pump driver provide adjustable regulated output voltages VGH and VGL to bias the TFT. Both boost and buck converter, as well as the charge-pump drivers, operate with a fixed switching frequency of 500 kHz or 750 kHz, selectable by the FREQ pin. The device includes adjustable power-on sequencing. The safety features of the device are overvoltage protection for boost converter, short-circuit protection for Vs, Vlogic and VGH, and thermal shutdown.

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Similar but not functionally equivalent to the compared device:
TPS65168 ACTIVE High Resolution, Fully Programmable LCD Bias IC for TV This product has the same rails and no OpAmps while adding flexible sequencing, I2C programming and temperature compensation for VGH.
TPS65178 ACTIVE Fully Programmable LCD Bias IC for TV with 6-Channel Gamma Buffer, Vcom Reference and Dynamic Gain This product has the same rails, flexible sequencing, I2C programming, temperature compensation for VGH and an integrated 6ch gamma buffer, but without OpAmps.

Technical documentation

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Type Title Date
* Data sheet Compact LCD Bias IC With High Speed Amplifiers for TV-LCD Panels datasheet (Rev. C) Jul. 03, 2012
Application note Understanding Undervoltage Lockout in Power Devices (Rev. A) Sep. 19, 2018
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application note Generation of a VCOM buffer input using PWM signal Dec. 21, 2015
Application note Basic Calculation of a Buck Converter's Power Stage (Rev. B) Aug. 17, 2015
Application note Basic Calculation of a Boost Converter's Power Stage (Rev. C) Jan. 08, 2014
User guide TPS65162EVM-278 (Rev. A) Oct. 05, 2009

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
TPS65162 Evaluation Module
TPS65162EVM-278
document-generic User guide
49
Description

The TPS65162EVM-278 evaluation module operates from a 8 V to 14 V input rail and provides the three bias-supply voltages (Vs, VGH, and VGL) and a logic-supply voltage (3.3 V) that are required for television and monitor TFT-LCD panels. This device also provides two operational (...)

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CAD/CAE symbols

Package Pins Download
VQFN (RGZ) 48 View options

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