LX1744 Просмотр технического описания (PDF) - Microsemi Corporation

Номер в каталоге

Компоненты Описание

производитель

LX1744

Dual Output Boost – LED Driver / LCD Bias

Microsemi Corporation 

INTEGRATED PRODUCTS

LX1744

Dual Output Boost – LED Driver / LCD Bias

PRODUCTION DATASHEET

EVALUATION BOARD

Name

Table 1: Input and Output Pin Assignments

Input/Output

Range

Description

VIN

0 to 6V

Main power supply for outputs.

GNDx

ADJ

0V

0 to VIN-100mV

Common ground reference.

Apply a DC voltage or a PWM voltage to this pin to adjust the LCD1

output voltage. PWM inputs should be greater than 120Hz.

SHDN

SHDN

0 to VIN

Pulled up to VIN on board (10KΩ), Ground to inhibit the LED driver

output (VOUT).

Pulled up to VIN on board (10KΩ), Ground to inhibit the VLCD1.

VLCD

≤25V

Output voltage test point. Programmed for 18V output, adjustable up to

25V.

-VLCD

VOUT

≥-25V

≤25V

Output voltage mirror of VLCD1

LED drive voltage probe point.

LFB

BRT

0 to VIN

0 to 350mV

LED current sense feedback.

Apply a DC voltage or a PWM voltage to this pin to adjust the LED

current. PWM inputs should be greater than 120Hz with a DC portion

less than 350mV.

DRV

0 to VIN

LED Driver MOSFET Gate Driver Output

REF

1.19V Typ. Buffered IC reference output.

Note: All pins are referenced to ground.

Copyright © 2000

Rev. 1.1b, 2005-03-01

Microsemi

Integrated Products Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 11

Share Link: