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Product details

Parameters

Display type LCD unipolar IC integration Gamma buffer, LCD bias, LCD level shifter, VCOM Vin (Min) (V) 8.6 Vin (Max) (V) 15.5 Source driver voltage (Min) (V) 12.7 Source driver voltage (Max) (V) 19 Level shifter/scan driver (ch) 12 V_POS (Min) (V) 19 V_POS (Max) (V) 34 V_NEG (Min) (V) -8.1 V_NEG (Max) (V) -1.8 Special function GPM or GVS, Gamma buffer, HAVDD, I2C interface, Level shifter, Reset generator, Temperature sensor or compensation, VCOM or op amp Topology Boost, Buck Rating Catalog open-in-new Find other LCD & OLED display power & drivers

Package | Pins | Size

VQFN (RSH) 56 49 mm² 7 x 7 open-in-new Find other LCD & OLED display power & drivers

Features

  • 8.6V to 14.7V Input Voltage Range
  • Boost Converter VDD: 12.7V…19V (6-Bit)
  • Integrated Input-to-Output Isolation Switch
  • Buck Converter HVDD: VDD Tracking
  • Buck Converter VCC: 1.6V...2.0V & 3.0V…3.6V (4-Bit)
  • Positive Charge Pump VGH:
    • 19V…34V for Low Temperature (4-Bit)
    • 17V…32V for High Temperature (4-Bit)
  • Negative Charge Pump VGL: –1.8V…–8.1V (6-Bit)
  • 6-Ch Gamma Buffer:
    • 3-Ch: VDD…HVDD (9-Bit)
    • 3-Ch: HVDD...GND (9-Bit)
  • 9-Bit VCOM Reference
  • 3-Bit VCOM Gain
  • VCOM_DAC Output for External Operational Amplifier Reference
  • Temperature Compensation for VGH and VCOM
  • Reset Signal with Programmable Delay Time
  • Programmable Sequencing Delays (4 × 3-Bit)
  • Thermal Shutdown
  • 12-Channel Level Shifters:
    • Supports Forward and Reverse Operation
    • Abnormal Operation Detection
  • 56-Pin 7-mm × 7-mm QFN Package
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Description

The TPS65175B/C provides a simple and economic power supply solution for a wide variety of LCD bias applications. The device provides all supply rails needed by a TFT-LCD panel but also 6 gamma references, a supply rail for LVDS support, as well as a Vcom reference. The device also integrates a VCOM_DAC rail providing the reference for an external non-inverting operational amplifier input. A 12-Channel Level Shifter is also integrated. The solution is delivered in a small 7×7 mm QFN package.

The TPS65175B/C provides a simple and economic power supply solution for a wide variety of LCD bias applications. The device provides all supply rails needed by a TFT-LCD panel. VCC and RST for the T-Con. VDD and HVDD for the Source Driver. VGH and VGL for the Gate Driver or the Level Shifters. A VCOM operational amplifier is also integrated to provide a common plane reference. The VGH and VCOM / VCOM_DAC voltages can be compensated for low and high temperatures. The transition from one programmed value to another is made using an external thermistor connected to the IC. In addition, a 6-channel Gamma Buffer as well as a 12-Channel Level Shifter are integrated. All output rails and delay times are programmable by a two-wire interface: a single BOM (Bill of Material) can cover several panel types and sizes whose desired output levels can be programmed in production and stored in a non-volatile memory embedded into the TPS65175B/C. The solution is delivered in a small 7 mm × 7 mm QFN-56 package.

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Technical documentation

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Type Title Date
* Data sheet TPS65175B/C 1 page email address datasheet Jul. 24, 2013
Application note Understanding Undervoltage Lockout in Power Devices (Rev. A) Sep. 19, 2018
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
Application note Minimizing Ringing at the Switch Node of a Boost Converter Sep. 15, 2006

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VQFN (RSH) 56 View options

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