MAX1514ETP-T

更新时间： 2024-11-04 12:58:03

品牌	Logo	应用领域
美信 - MAXIM		控制器
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数据手册

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MAX1514ETP-T 数据手册

19-3047; Rev 0; 10/03

TFT-LCD Power-Supply Controllers

General Description

Features

♦ 2.7V to 5.5V Input Supply Range

♦ Input-Supply Undervoltage Lockout

♦ Current-Mode Step-Up Controller

The MAX1513/MAX1514 provide complete power-sup-

ply solutions for active-matrix thin-film transistor (TFT)

liquid-crystal displays (LCDs). Both devices include a

high-performance step-up regulator controller, three lin-

ear-regulator controllers, and an adjustable delay block

for startup sequencing. The MAX1513 includes an

additional linear-regulator controller and a high-perfor-

mance buffer amplifier. The MAX1513/MAX1514 can

operate from 2.7V to 5.5V input supplies and provide

overload protection with timer delay latch on all the reg-

ulated outputs.

Fast Transient Response to Pulsed Load

High Efficiency

Lossless Current Sensing

430kHz/750kHz/1.5MHz Switching Frequency

♦ Linear-Regulator Controllers for V

, V

GON GOFF

♦ Linear-Regulator Controller for Logic Supply

♦ High-Performance Buffer Amplifier (MAX1513 Only)

The step-up regulator controller drives an external N-

channel MOSFET to generate the regulated supply volt-

age for the panel source-driver ICs. Its current-mode

control architecture provides fast transient response to

pulsed loads. The high switching frequency (up to

1.5MHz) allows the use of ultra-small inductors and

ceramic capacitors while achieving efficiencies over 85%

using lossless current sensing. The internal soft-start lim-

its the input surge current during startup.

♦ Additional Linear-Regulator Controller

(MAX1513 Only)

♦ Power-Up Sequence and V

Delay Control

GON

♦ V

, V

Shutdown Control

MAIN

GON GOFF GAMMA

♦ Timer-Delay Fault Latch for All Outputs

♦ Thermal-Overload Protection

Ordering Information

The gate-on and gate-off linear-regulator controllers of

the MAX1513/MAX1514 provide regulated TFT gate-on

and gate-off supplies. The gate-on supply is activated

after an adjustable delay following the step-up regulator.

The logic linear-regulator controller can be used to cre-

ate a low-voltage logic supply. The gamma linear-regula-

tor controller of the MAX1513 can be used to generate a

gamma-correction reference supply or another general-

purpose supply rail. The MAX1513’s high-performance

buffer amplifier can drive the LCD backplane (VCOM)

or the gamma-correction divider string.

PART

TEMP RANGE PIN-PACKAGE

MAX1513ETP

MAX1514ETP

-40°C to +85°C 20 Thin QFN 4mm x 4mm

Minimal Operating Circuit

CS+

CS-

MAIN

The MAX1513/MAX1514 are available in 4mm ✕ 4mm

20-pin thin QFN packages with a maximum thickness of

0.8mm, suitable for ultra-thin LCD panel design.

SDFR

DEL

GATE

GND

Applications

MAX1513

MAX1514

DRVL

FBL

Notebook Computer Displays

LCD Monitors and TVs

Automotive Displays

LOGIC

DRVP

FBP

GON

MAIN

DRVG

FBG

GAMMA

SUPB

FBPB

DRVN

FBN

GOFF

Pin Configuration appears at end of data sheet.

TO VCOM

OUTB

REF

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...28

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