TPS65148

更新时间： 2024-11-16 07:04:51

品牌	Logo	应用领域
德州仪器 - TI		调节器监控
页数	文件大小	规格书
30页	1185K
描述
Compact TFT LCD Bias IC for Monitor with VCOM Buffer, Voltage Regulator for Gamma Buffer and Reset Function

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TPS65148 数据手册

TPS65148

www.ti.com ........................................................................................................................................................................................................ SLVS904–MAY 2009

Compact TFT LCD Bias IC for Monitor with VCOM Buffer, Voltage Regulator for Gamma

Buffer and Reset Function

FEATURES

•

Reset Function (XAO Signal)

LCD Discharge Function

Overvoltage Protection

Overcurrent Protection

Thermal Shutdown

•

2.5V to 6.0V Input Voltage Range

•

Up to 18V Boost Converter With 4A Switch

Current

•

630kHz/1.2MHz Selectable Switching

Frequency

32-Pin 5*5mm QFN Package

•

Adjustable Soft-Start for the Boost Converter

Gate Driver for External Input-to-Output

Isolation Switch

APPLICATIONS

•

Monitor

•

0.5% Accuracy Voltage Regulator for Gamma

Buffer

•

TV (5V Input Voltage)

•

Gate Voltage Shaping

VCOM Buffer

DESCRIPTION

The TPS65148 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 5 V supply rail. The device integrates a high

power step-up converter for V_S(Source Driver voltage), a very accurate voltage rail using an integrated LDO to

supply the Gamma Buffer (V_{REG_O}) and a Vcom buffer driving the LCD backplane. In addition to that, a gate

voltage shaping block is integrated. The V_GHsignal (Gate Driver High voltage) supplied by an external positive

charge pump, is modulated into V_GHMwith high flexibility by using a logic input VFLK and an external discharge

resistor connected to RE pin. Also, an external negative charge pump can be set using the boost converter of the

TPS65148 to generate V_GL(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.

Space between text and graphic

V_IN

Boost Converter

(Over Voltage Protection)

V_S

13.6 V/500 mA

(High Voltage Stress)

Gate Driver for Input-to-output

Isolation Switch

Gate Voltage

Shaping

V_GHM

24 V/20mA

LCD Discharge

Voltage Regulator for

Gamma

V_{REG_O}

12.5 V/30 mA

VCOM Buffer

(unity gain)

V_OPO

130mA

XAO

Reset Function

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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TPS65148 替代型号

型号	品牌	替代类型	描述	数据表
TPS65155	TI	功能相似	LCD Bias Solution with Level Shifters for GOA Panels

与TPS65148相关器件

型号	品牌	获取价格	描述	数据表
TPS65148RHB	TI	获取价格	Compact TFT LCD Bias IC for Monitor with VCOM Buffer, Voltage Regulator for Gamma Buffer a
TPS65148RHBR	TI	获取价格	Compact TFT LCD Bias IC for Monitor with VCOM Buffer, Voltage Regulator for Gamma Buffer a
TPS65148RHBT	TI	获取价格	Compact TFT LCD Bias IC for Monitor with VCOM Buffer, Voltage Regulator for Gamma Buffer a
TPS65149	TI	获取价格	用于使用 ASG/GIP 技术的 LCD 面板的 LCD 偏置解决方案
TPS65149RSHR	TI	获取价格	用于使用 ASG/GIP 技术的 LCD 面板的 LCD 偏置解决方案 \| RSH \| 5
TPS65150	TI	获取价格	Low Input Voltage, Compact LCD Bias IC With VCOM Buffer
TPS65150PWP	TI	获取价格	Low Input Voltage, Compact LCD Bias IC With VCOM Buffer
TPS65150PWPG4	TI	获取价格	Low Input Voltage, Compact LCD Bias IC With VCOM Buffer
TPS65150PWPR	TI	获取价格	Low Input Voltage, Compact LCD Bias IC With VCOM Buffer
TPS65150PWPRG4	TI	获取价格	Low Input Voltage, Compact LCD Bias IC With VCOM Buffer

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