TPS65165

ACTIVE

4-CH LCD Bias w/ Fully Int. Pos. Charge Pump, 3.3V LDO Contr., 0.96A Min. Boost Ilim & Fault Detect

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, 7 to 13 inches Source driver voltage (min) (V) 7 Source driver voltage (max) (V) 18 Level shifter/scan driver (Ch) 0 V_POS (max) (V) 30 V_NEG (max) (V) -2 Features GPM or GVS, 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, 7 to 13 inches Source driver voltage (min) (V) 7 Source driver voltage (max) (V) 18 Level shifter/scan driver (Ch) 0 V_POS (max) (V) 30 V_NEG (max) (V) -2 Features GPM or GVS, VCOM or op amp Topology Boost Rating Catalog Operating temperature range (°C) -40 to 85
WQFN (RSB) 40 25 mm² 5 x 5
  • 2.5 V to 6.0 V Input Voltage Range
  • Vs Output Voltage up to 18 V
    • 1%-Accurate Boost Converter With 4.5 A Switch Current
    • 600 kHz Fixed Frequency PWM Operation
    • Overvoltage Protection
    • Adjustable Softstart
  • Regulated Positive Charge Pump Converter VGH
  • Integrated Gate Voltage Shaping of VGH
  • Regulated Negative Charge-Pump Driver VGL
  • Adjustable Sequencing for Vs and VGH
  • 3 Integrated High-Speed Operational Amplifiers
    • 50 MHz 3 db Bandwidth
    • Slew Rate 45 V/µs
    • 215 mA Short Circuit Current
  • High Voltage Test Mode (HVS)
  • Thermal Shutdown
  • 40-Pin 5×5-mm QFN Package
  • APPLICATIONS
    • LCD Monitor
    • LCD TV Panel

  • 2.5 V to 6.0 V Input Voltage Range
  • Vs Output Voltage up to 18 V
    • 1%-Accurate Boost Converter With 4.5 A Switch Current
    • 600 kHz Fixed Frequency PWM Operation
    • Overvoltage Protection
    • Adjustable Softstart
  • Regulated Positive Charge Pump Converter VGH
  • Integrated Gate Voltage Shaping of VGH
  • Regulated Negative Charge-Pump Driver VGL
  • Adjustable Sequencing for Vs and VGH
  • 3 Integrated High-Speed Operational Amplifiers
    • 50 MHz 3 db Bandwidth
    • Slew Rate 45 V/µs
    • 215 mA Short Circuit Current
  • High Voltage Test Mode (HVS)
  • Thermal Shutdown
  • 40-Pin 5×5-mm QFN Package
  • APPLICATIONS
    • LCD Monitor
    • LCD TV Panel

The TPS65165 is a Compact LCD Bias IC with 3 high-speed operational amplifiers for gamma correction and/or VCOM supply. The device generates all 3 voltage rails for TFT-LCD displays (Vs, VGL and VGH). The device incorporates a high-voltage switch that can be controlled by a logic signal from the timing controller (TCON) to provide the gate-voltage modulation for VGH. If this function is not required, the CTRL pin can be tied high.

The device also features a high-voltage stress test, where the output voltage of VGH is typically set to 30 V, and the output voltage of Vs is programmable to any higher voltage. The high-voltage stress test is enabled by pulling the HVS pin high. Adjustable sequencing is implemented, and can be programmed by selecting the capacitor values connected to ADLY and GDLY. The device consists of a boost converter to provide the source voltage Vs operating at a fixed switching frequency of 600 kHz. A fully integrated positive charge pump, switching automatically between doubler and tripler mode provides an adjustable regulated TFT gate on voltage VGH. A negative charge pump driver provides adjustable regulated output voltage VGL. To minimize external components the charge pumps for VGH and VGL operate at a fixed switching frequency of 1.2 MHz. The device includes safety features like overvoltage protection of the boost converter, short circuit protection of VGH and VGL as well as thermal shutdown.

The TPS65165 is a Compact LCD Bias IC with 3 high-speed operational amplifiers for gamma correction and/or VCOM supply. The device generates all 3 voltage rails for TFT-LCD displays (Vs, VGL and VGH). The device incorporates a high-voltage switch that can be controlled by a logic signal from the timing controller (TCON) to provide the gate-voltage modulation for VGH. If this function is not required, the CTRL pin can be tied high.

The device also features a high-voltage stress test, where the output voltage of VGH is typically set to 30 V, and the output voltage of Vs is programmable to any higher voltage. The high-voltage stress test is enabled by pulling the HVS pin high. Adjustable sequencing is implemented, and can be programmed by selecting the capacitor values connected to ADLY and GDLY. The device consists of a boost converter to provide the source voltage Vs operating at a fixed switching frequency of 600 kHz. A fully integrated positive charge pump, switching automatically between doubler and tripler mode provides an adjustable regulated TFT gate on voltage VGH. A negative charge pump driver provides adjustable regulated output voltage VGL. To minimize external components the charge pumps for VGH and VGL operate at a fixed switching frequency of 1.2 MHz. The device includes safety features like overvoltage protection of the boost converter, short circuit protection of VGH and VGL as well as thermal shutdown.

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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 w/High Speed Amp for TV & Monitor TFT-LCD Panels datasheet (Rev. A) 25 May 2007
Application note Understanding Undervoltage Lockout in Power Devices (Rev. A) 19 Sep 2018
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Generation of a VCOM buffer input using PWM signal 21 Dec 2015
EVM User's guide TPS65165EVM-233 07 Mar 2007
Application note Minimizing Ringing at the Switch Node of a Boost Converter 15 Sep 2006

Design & development

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Evaluation board

TPS65165EVM-233 — TPS65165 Evaluation Module

The TPS65165EVM-233 takes a 2.5 V to 6 V input rail and provides the three bias-supply voltages and 3 integrated op amps that are required for TV and mointor TFT-LCD panels. The TPS65165EVM-233 has one boost converter with an integrated low-side FET, one negative charge-pump (...)

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WQFN (RSB) 40 Ultra Librarian

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