TPS65167A

ACTIVE

4-CH LCD Bias w/ Fully Int. Positive Charge Pump, LDO Controller, HVS (VDD / VGH) & Temp. Sensor

Product details

Display type LCD unipolar IC integration LCD bias Vin (min) (V) 6 Vin (max) (V) 14 Applications 13 to 21 inches, 21 inches and above Source driver voltage (max) (V) 19 Level shifter/scan driver (Ch) 0 V_POS (max) (V) 30 V_NEG (max) (V) -2 Features GPM or GVS, Output discharge, Temperature sensor or compensation Topology Boost Rating Catalog Operating temperature range (°C) -40 to 85
Display type LCD unipolar IC integration LCD bias Vin (min) (V) 6 Vin (max) (V) 14 Applications 13 to 21 inches, 21 inches and above Source driver voltage (max) (V) 19 Level shifter/scan driver (Ch) 0 V_POS (max) (V) 30 V_NEG (max) (V) -2 Features GPM or GVS, Output discharge, Temperature sensor or compensation Topology Boost Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RHA) 40 36 mm² 6 x 6
  • 6 V to 14 V Input Voltage Range
  • Vs Output Voltage Range up to 19 V
  • Boost Converter With 3.5-A Switch Current
  • Boost Converter Overvoltage Protection
  • 2.5-A Step-Down Converter With 3.3-V Fixed or Adjustable Output
  • 750 kHz Fixed Switching Frequency
  • 150 mA Negative Charge Pump Driver for VGL
  • 50 mA Positive Charge Pump for VGH
  • LDO Controller for Logic Supply
  • Gate Voltage Shaping for VGH
  • Temperature Sensor Output
  • TPS65167 - High Voltage Stress Test Vs
    and VGH
  • TPS65167A - High Voltage Stress Test Vs only
  • Adjustable Sequencing
  • Gate Drive Signal for Isolation Switch
  • Short-Circuit Protection
  • Internal Soft-start
  • Thermal Shutdown
  • Available in 6 × 6 mm 40 Pin QFN Package
  • APPLICATIONS
    • LCD TV Panel
    • LCD Monitor
  • 6 V to 14 V Input Voltage Range
  • Vs Output Voltage Range up to 19 V
  • Boost Converter With 3.5-A Switch Current
  • Boost Converter Overvoltage Protection
  • 2.5-A Step-Down Converter With 3.3-V Fixed or Adjustable Output
  • 750 kHz Fixed Switching Frequency
  • 150 mA Negative Charge Pump Driver for VGL
  • 50 mA Positive Charge Pump for VGH
  • LDO Controller for Logic Supply
  • Gate Voltage Shaping for VGH
  • Temperature Sensor Output
  • TPS65167 - High Voltage Stress Test Vs
    and VGH
  • TPS65167A - High Voltage Stress Test Vs only
  • Adjustable Sequencing
  • Gate Drive Signal for Isolation Switch
  • Short-Circuit Protection
  • Internal Soft-start
  • Thermal Shutdown
  • Available in 6 × 6 mm 40 Pin QFN Package
  • APPLICATIONS
    • LCD TV Panel
    • LCD Monitor

The TPS65167 offers a compact power supply solution to provide all voltages required by a LCD panel for large size monitor and TV panel applications running from a 12-V supply rail.

The device generates all 3 voltage rails for the TFT LCD bias (Vs, VGL and VGH). In addition to that it includes a step-down converter and a LDO controller to provide two logic voltage rails. The device incorporates a high voltage switch that can be controlled by a logic signal from the external timing controller (TCON). This function allows gate voltage shaping for VGH. The device also features a high voltage stress test where the output voltage of VGH is set to typically 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. The device consists of a boost converter to provide the source voltage Vs operating at a fixed switching frequency of 750 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 voltages VGL. To minimize external components the charge pumps for VGH and VGL operate at a fixed switching frequency of 1.5 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 TPS65167 offers a compact power supply solution to provide all voltages required by a LCD panel for large size monitor and TV panel applications running from a 12-V supply rail.

The device generates all 3 voltage rails for the TFT LCD bias (Vs, VGL and VGH). In addition to that it includes a step-down converter and a LDO controller to provide two logic voltage rails. The device incorporates a high voltage switch that can be controlled by a logic signal from the external timing controller (TCON). This function allows gate voltage shaping for VGH. The device also features a high voltage stress test where the output voltage of VGH is set to typically 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. The device consists of a boost converter to provide the source voltage Vs operating at a fixed switching frequency of 750 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 voltages VGL. To minimize external components the charge pumps for VGH and VGL operate at a fixed switching frequency of 1.5 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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Technical documentation

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Type Title Date
* Data sheet Compact LCD Bias Supply for TFT-LCD TV Panels datasheet (Rev. C) 10 Mar 2008
Application note 스트컨버터의 전력계 기본 계산 (Rev. D) PDF | HTML 21 Nov 2022
Application note Basic Calculation of a Boost Converter's Power Stage (Rev. D) PDF | HTML 28 Oct 2022
Application note Understanding Undervoltage Lockout in Power Devices (Rev. A) 19 Sep 2018
Application note Generation of a VCOM buffer input using PWM signal 21 Dec 2015
Application note Basic Calculation of a Buck Converter's Power Stage (Rev. B) 17 Aug 2015
Application note Minimizing Ringing at the Switch Node of a Boost Converter 15 Sep 2006

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