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TPS65148

現行

具 GPM、VCOM、重設、LCD 放電、HVS、外接元件的 4 通道 LCD 偏壓適用 Gamma 的隔離開關和 LDO

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產品規格表

TPS65148

現行
產品規格表 立即訂購

產品詳細資料

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) 18 Features GPM or GVS, Output discharge, Reset generator, 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) 18 Features GPM or GVS, Output discharge, Reset generator, VCOM or op amp Topology Boost Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RHB) 32 25 mm² (5 mm × 5 mm)
  • 2.5V to 6V Input Voltage Range
  • Up to 18V Boost Converter With 4A Switch Current
  • 630kHz/1.2MHz Selectable Switching Frequency
  • Adjustable Soft-Start for the Boost Converter
  • Gate Driver for External Input-to-Output Isolation Switch
  • 0.5% Accuracy Voltage Regulator for Gamma Buffer
  • Gate Voltage Shaping
  • VCOM Buffer
  • Reset Function (XAO Signal)
  • LCD Discharge Function
  • Overvoltage Protection
  • Overcurrent Protection
  • Thermal Shutdown
  • 32-Pin 5∗5mm QFN Package
  • APPLICATIONS
    • Monitor
    • TV (5V Input Voltage)
  • 2.5V to 6V Input Voltage Range
  • Up to 18V Boost Converter With 4A Switch Current
  • 630kHz/1.2MHz Selectable Switching Frequency
  • Adjustable Soft-Start for the Boost Converter
  • Gate Driver for External Input-to-Output Isolation Switch
  • 0.5% Accuracy Voltage Regulator for Gamma Buffer
  • Gate Voltage Shaping
  • VCOM Buffer
  • Reset Function (XAO Signal)
  • LCD Discharge Function
  • Overvoltage Protection
  • Overcurrent Protection
  • Thermal Shutdown
  • 32-Pin 5∗5mm QFN Package
  • APPLICATIONS
    • Monitor
    • TV (5V Input Voltage)

The TPS65148 offers a compact power supply solution designed to supply the LCD bias voltages required by TFT (Thin Film Transistor) LCD panels running from a typical 5 V supply rail. The device integrates a high power step-up converter for VS (Source Driver voltage), an accurate voltage rail using an integrated LDO to supply the Gamma Buffer (VREG_O) and a Vcom buffer driving the LCD backplane. In addition to that, a gate voltage shaping block is integrated. The VGH signal (Gate Driver High voltage) supplied by an external positive charge pump, is modulated into VGHM with high flexibility by using a logic input VFLK and an external discharge resistor connected to the RE pin. Also, an external negative charge pump can be set using the boost converter of the TPS65148 to generate VGL (Gate Driver Low voltage). The integrated reset function together with the LCD discharge function available in the TPS65148 provide the signals enabling the discharge of the LCD TFT pixels when powering-off. The device includes safety features like overcurrent protection (OCP) and short-circuit protection (SCP) achieved by an external input-to-output isolation switch, as well as overvoltage protection (OVP) and thermal shutdown.

The TPS65148 offers a compact power supply solution designed to supply the LCD bias voltages required by TFT (Thin Film Transistor) LCD panels running from a typical 5 V supply rail. The device integrates a high power step-up converter for VS (Source Driver voltage), an accurate voltage rail using an integrated LDO to supply the Gamma Buffer (VREG_O) and a Vcom buffer driving the LCD backplane. In addition to that, a gate voltage shaping block is integrated. The VGH signal (Gate Driver High voltage) supplied by an external positive charge pump, is modulated into VGHM with high flexibility by using a logic input VFLK and an external discharge resistor connected to the RE pin. Also, an external negative charge pump can be set using the boost converter of the TPS65148 to generate VGL (Gate Driver Low voltage). The integrated reset function together with the LCD discharge function available in the TPS65148 provide the signals enabling the discharge of the LCD TFT pixels when powering-off. The device includes safety features like overcurrent protection (OCP) and short-circuit protection (SCP) achieved by an external input-to-output isolation switch, as well as overvoltage protection (OVP) and thermal shutdown.
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TPS65149 現行 適用使用 ASG/GIP 技術的 LCD 面板 LCD 偏壓解決方案 This product has no voltage regulator for gamma, adds an 8 ch level shifter and has a programmable Vcom and Vgl.

技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 Compact TFT LCD Bias IC with VCOM Buffer, Voltage Regulator and Reset Function datasheet (Rev. A) 2011/1/19
應用說明 Understanding Undervoltage Lockout in Power Devices (Rev. A) 2018/9/19
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25
應用說明 Generation of a VCOM buffer input using PWM signal 2015/12/21

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