LX1745CPW Ver la hoja de datos (PDF) - Microsemi Corporation

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componentes Descripción

Fabricante

LX1745CPW

Triple Output Boost – LED Driver / LCD Bias

Microsemi Corporation 

LX1745

TM

®

Triple Output Boost – LED Driver / LCD Bias

PRODUCTION DATASHEET

EVALUATION BOARD

Jumper

Table 3: Jumper Position Assignments

Position

Function

JU1

N/A

Remove the factory installed jumper and insert a 4~6cm wire loop

JU2

N/A

(optional) to observe the inductor current waveform using a current

probe.

JU3

N/A

JU4

N/A

Remove jumper to test open-circuit over-voltage protection implemented

with R1 and R2

Note: All pins are referenced to ground.

Table 4: Factory Installed Component List

Ref

Part Description

C1

CAPACITOR, 4.7μF, 1210, 6.3V

C2, C5, C6 CAPACITOR, 4.7μF, 1210, 35V

C3, C7, C8 CAPACITOR, 1000pF, 0805, 35V

C4, C11 CAPACITOR, (SPARE), See Note 1

C9, C10, C12,

C13

CAPACITOR, 1μF, 0805, 35V

CR1, CR2,

CR3, CR4, CR5

Microsemi UPS5819, SCHOTTKY, 1A, 40V, POWERMITE

LED1, LED2,

LED3, LED4

Microsemi UPWLEDxx, LED, Optomite

L1, L2, L3 INDUCTOR, 47μH, 480mA, SMT

Q1

FDV303N MOSFET, 30V, SOT-23

R1, R5

RESISTOR, 1M, 1/16W, 0805

R2, R6, R8 RESISTOR, 75K, 1/16W, 0805

R3

RESISTOR, 15, 1/16W, 0805

R4

RESISTOR, 4.02K, 1/16W, 0805

R7

RESISTOR, 1.25M, 1/16W, 0805

R9, R10, R11 RESISTOR, 10K, 1/16W, 0805

R12, R13 RESISTOR, 100K, 1/16W, 0805

U1

Microsemi LX1745CPW BOOST CONTROLLER

Notes

1. Use these locations to insert additional input and/or output capacitance.

Copyright © 2000

Rev. 1.2, 2006-02-27

Microsemi

Integrated Products Division

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

Page 12

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