AT1739 GMT [Global Mixed-mode Technology Inc], AT1739 Datasheet

AT1739

Manufacturer Part Number

AT1739

Description

LCD Panel Step-up Converter with Analog Multi Function Outputs

Manufacturer

GMT [Global Mixed-mode Technology Inc]

Datasheet

1.AT1739.pdf (1 pages)

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LCD Panel Step- up Converter with Analog Multi-

Function Outputs

Features

Applications

Pin Configuration

Ver: 0.2

Dec 04, 2008

2.6V to 5.5V Input Supply Range

640kHz/1.2MHz Current-Mode PWM Step-Up

Regulator:

Fast Transient Response

1.0% High-Accuracy Output Voltage

Built-In 18V, 2.0A, 0.2Ω N-Channel MOSFET

Programmable Soft-Start

Current-Limit

Latched Fault Protection with Timer

High Efficiency

Gate-On Charge Pump Regulator Controller

with Latched Fault Protection with Timer

High-Performance Linear Regulator:

1.5% Output Accuracy

Works with Small Ceramic Output Capacitors

Fast Transient Response

Foldback Current Limit

High-Current Operational Amplifier:

±150mA Output Short-Circuit Current

13V/µs Slew Rate

12MHz, -3dB Bandwidth

Rail-to-Rail Input/Output

Gate-on Pulse Modulator with Adjustable Delay

for Sequence Control

Voltage Detector with Adjustable Delay

LCD Monitor Panel Modules

NB LCD Panel Modules

Automotive Displays

Global Mixed-mode Technology Inc.

A GND

O UTL

FBL

AT1739 TQFN4X4-24

Thermal

Pad

General Description

The AT1739 offers a complete power-supply solution

for TFT LCD panels used in LCD monitors and NB LCD

panels. The AT1739 consists of a high-performance

step-up converter, a low-power charge-pump regulator,

a high-performance linear regulator, an operational

amplifier, a voltage detector and a logic-controlled

gate-on pulse modulator.

The step-up DC-DC converter provides the regulated

supply voltage for the panel source driver ICs. The

charge-pump regulator generates the positive gate-on

supply voltage. The operational amplifier supplies the

VCOM buffer with high output current, fast slew rate and

wide bandwidth performances for driving capacitive loads.

The high-voltage gate-on pulse modulator to control

the positive gate-on output voltage waveform for

reducing the flicker on TFT LCD panel.

The high-performance linear regulator uses an internal

P-channel MOSFET to supply load currents up to 350mA.

It provides the regulated supply voltage for the TCON IC.

The

voltage-point and delay-time monitors the input supply

voltage to prevent the improper shutdown of the

system power application.

The AT1739 is available in a 24-pin thin QFN package

which is 4mm x 4mm with a maximum thickness of

0.8mm for ultra-thin LCD panel design.

Ordering Information

Note: R5: TQFN4X4-24

AT1739R51U

NUMBER

ORDER

1 : Bonding Code

U: Tape & Reel

voltage

DRVP

FBP

DRN

VDD

VP SRC

GON

detector

MARKING

A1739

with

-40°C to 85°C

RANGE

TEMP.

AT1739

adjustable

http://www.gmt.com.tw

TEL: 886-3-5788833

TQFN4X4-24

PACKAGE

(Green)

detected

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