TPS65146RGER

更新时间： 2024-11-16 11:50:27

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
30页	1210K
描述
Compact LCD Bias IC with LDO, VCOM Buffer and Reset Function

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TPS65146RGER 数据手册

TPS65146

www.ti.com ........................................................................................................................................................................................... SLVS869–NOVEMBER 2008

Compact LCD Bias IC with LDO, VCOM Buffer and Reset Function

FEATURES

•

LCD Discharge Function

Overvoltage Protection

Thermal Shutdown

•

2.5V to 6.0V Input Voltage Range

16.5V Boost Converter With 2A Switch Current

650kHz/1.2MHz Selectable Switching

Frequency

Undervoltage Lockout

24-Pin 4×4mm QFN Package

•

Adjustable Soft-Start for the Boost Converter

500mA LDO

APPLICATIONS

•

Notebook PC

Reset Function (XAO Signal)

Regulated VGH

•

Monitor

Gate Voltage Shaping

VCOM Buffer

DESCRIPTION

The TPS65146 offers a very compact power supply solution designed to supply the LCD bias voltages required

by TFT (Thin Film Transistor) LCD panels running from a typical 3.3 V or 5 V supply rail. The device integrates a

step-up converter for V_S(Source Driver voltage), a positive charge pump regulator for V_GH(Gate Driver High

voltage), a logic voltage rail using an integrated LDO and a Vcom buffer driving the LCD backplane. In addition to

that, a gate voltage shaping block is integrated for V_GH, modulating the signal (into V_GHM) with high flexibility by

using a logic input VFLK and an external discharge resistor connected to RE pin. Also, an external discrete

negative charge pump can be set using the boost converter of the TPS65146 to generate V_GL(Gate Driver Low

voltage). The integrated reset function together with the LCD discharge function available in the TPS65146

provide the signals enabling the discharge of the LCD TFT pixels when powering-off. The device includes safety

features like overvoltage protection (OVP), as well as thermal shutdown.

Space between text and graphic

Boost Converter

and

Over Voltage Protection

9 V/300 mA

3.3 V

Positive Charge Pump Regulator,

Gate Voltage Shaping

and

LCD Discharge Function

GHM

20 V/±0 mA

LVOUT

LDO

2.5 V/500 mA

VCOM Buffer

(unity gain)

COM

±±20 mA

Reset function

XAO

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...30

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