Datasheet > AT1731AP

AT1731AP

更新时间： 2024-10-26 04:07:11

品牌	Logo	应用领域
AIMTRON		/
页数	文件大小	规格书
22页	456K
描述
DC-DC Power IC for TFT Panel

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AT1731AP 数据手册

AT1731A

Preliminary Product Information

DC-DC Power IC for TFT Panel

Feature

Description

• 2.6V to 5.5V Supply Voltage Operating Range.

• 1.2MHz Fixed Switching Frequency.

The AT1731A DC-DC converter supply a compact

and small power supply solution to provide the

regulated voltages required by thin film transistor

(TFT) LCD display. A built-in power sequence

control.

• Current-Mode PWM Step-Up Regulator

Main High-Power Output up to 15V

Typical ± 1% Accuracy

Built-In N-MOS, R_ds(on)≒0.25Ω(Typ.)

Current-Limit Comparator

The main step-up DC-DC converter is

high-Frequency 1.2 MHz current-mode PWM

regulator with a built-in 0.25ΩN-MOS that allows the

use of ultra-small inductors and ceramic capacitor to

generate an externally set output voltage up to 15V. It

provides fast transient response to pulsed loads while

operating with efficiencies over 85%.

The two built-in charge-pump regulators are used to

generate the TFT gate-on and gate-off supplies and

can adjust gate-on and gate-off output voltage with

external resistive divider between gate-off/on output

voltage and ground.

• Negative Charge-Pump Output Voltage Down

to –30 V.

• Positive Charge-Pump Output Voltage Up to

30 V.

• Internal Power-On Sequencing , Soft-Start.

• Thermal Protection , Short Circuit Protection.

• 1uA Shutdown Current.

• 1.5mA Quiescent Current.

• 16-pin TSSOP Package.

Application

• TFT-LCD Notebook Display

• TFT-LCD Desktop Monitor Panels.

• Car Navigation Systems.

AT1731A is available in TSSOP- 16 package.

Block Diagram

/SHDN

REF

SCP

GND

Vin

Reference

Voltage

Soft-

Start

Under-Voltage

Lockout

V_DDN

SWN

Negative

Charge-Pump

Block

FBN

Short-Circuit

Protection

Thermal

Protection

Logic Control Block

V_DDP

SWP

Positive

Charge-Pump

Block

PGND

Main Step-Up

Converter Block

FBP

COMP

Aimtron reserves the right without notice to change this circuitry and specifications.

7F, No.9,PARK AVENUE. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

2/8/2006 REV:1.1

Fax: 886-3-563-0879

WWW: http://www.aimtron.com.tw

Email: service@aimtron.com.tw

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