Datasheet > AAT1168

AAT1168

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
AAT		运算放大器
页数	文件大小	规格书
22页	1101K
描述
TRIPLE-CHANNEL TFT LCD POWER SOLUTION WITH OPERATIONAL AMPLIFIERS

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AAT1168 数据手册

Advanced Analog Technology, Inc.

May 2008

AAT1168/1168A/1168B

Product information presented is current as of publication date. Details are subject to change without notice.

TRIPLE-CHANNEL TFT LCD POWER SOLUTION

WITH OPERATIONAL AMPLIFIERS

FEATURES

ꢀ Built in 3A, 0.2Ω Switching NMOS

ꢀ Positive LDO Driver Up to 28V/5mA

ꢀ Negative LDO Driver Down to −14V/5mA

GENERAL DESCRIPTION

The AAT1168/AAT1168A/AAT1168B is a triple-channel

TFT LCD power solution that provides a step-up PWM

controller, two LDO drivers (one for positive high voltage

and one for negative voltage), five operational amplifiers,

and one high voltage switch up to 28V for TFT LCD

display.

ꢀ 1

and 4

Operational Amplifiers

COM

GAMMA

ꢀ 28V High Voltage Switch for VGH

ꢀ Internal Soft-Start Function

The PWM controller consists of an on-chip voltage

reference, oscillator, error amplifier, current sense circuit,

comparator, under-voltage lockout protection and

internal soft-start circuit. The thermal and power fault

protection prevents internal circuit being damaged by

excessive power.

ꢀ 1.2MHz Fixed Switching Frequency

ꢀ 3 Channels Fault and Thermal Protection

ꢀ Low Dissipation Current

ꢀ QFN-32 Package Available

The LDO drivers generate two regulated output voltage

set by external resistor dividers. VGH voltage does not

activate until DLY voltage exceeds 1.25V.

PIN CONFIGURATION

The AAT1168/AAT1168A/AAT1168B contains 4+1

operational amplifiers. VO1, VO2, VO4, and VO5 are for

VOUT3

gamma corrections and VO3 is for

. In the short

COM

VREF

IN1

circuit condition, operational amplifiers are capable of

sourcing 100mA current for , and 200mA

current for

GND

VDD

GAMMA

AAT1168/

AAT1168A/

AAT1168B

COM

GND1

With

the

minimal

external

components,

the

VO1

VI1-

VO5

VI5-

VI5+

VO4

AAT1168/A/B offers a simple and economical solution

for TFT LCD power.

VI1+

VO2

–

Advanced Analog Technology, Inc. –

Version 1.00

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