Microsemi

Linfinity Microelectronics Division

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

Page 8

Copyright

© 2000

Rev. 1.1b, 2005-03-03

LX1992

High Efficiency LED Driver

TM

®

Table 3: Factory Installed Component List for the LX1992 Evaluation Board

Quantity

Part

Reference

Description

Manufacturer

Part

Number

1

Q1

Mosfet, N-Channel, 25V, SOT23 Type SMT

Fairchild

FDV303N

1

CR1

Rectifier, Schottky, 1A, 20V, Powermite Type SMT

Microsemi

UPS5817

1

L1

Inductor, 47uH, 540mA, SMT

Toko

A920CY-470

2

C1, C2

Capacitor, Ceramic X5R, 4.7uF, 25V, 1210 Type SMT

Taiyo Yuden

CETMK325BJ475MN

2

C3, C4

Capacitor, Ceramic X7R, 0.1uF, 50V, 0805 Type SMT

Murata

GRM40X7R104M050

1

R4

Resistor, 15 Ohm, 1/10W, 0805 Type SMT

Panasonic

ERJ6ENF15R0

1

R5

Resistor, 1K, 1/16W, 0603 Type SMT

Panasonic

ERJ3EKF1001

1

R2

Resistor, 4.02K, 1/16W, 0603 Type SMT

Panasonic

ERJ3EKF4021

2

R3, R6

Resistor, 100K, 1/16W, 0603 Type SMT

Panasonic

ERJ3EKF1003

1

R1

Resistor, 10K, 1/16W, 0603 Type SMT

Panasonic

ERJ3EKF1002

1

R7

Trimpot, 50K, 1/2W, Through Hole Type

Bourns

3352E-1-503

1

VR1

IC, Voltage Reference, 1.25 Volts, SOT23 Type SMT

Microsemi

LX432CSC

1

VR2

Diode, Zener, 24V, 3W Powermite Type SMT

Microsemi

1PMT5934B

4

LED1 - 4

White LED

Chicago Miniature

CMD333UWC

3

JB1 - JB3

Header, 3 Pos Vertical Type

3M

929647-09-36

3

Jumper

3M

929955-06

Note: The minimum set of parts needed to build a working power supply are: Q1, CR1, L1, C2, C3, R2, R4, U1.

VBAT

VADJ

VCC

VPOT

GND

VCC

SHDN

VADJ

VPOT

C1

4.7µF

25V

L1

47µH

CR1

UPS5817

Q1

FDV303N

C2

4.7µF

25V

VR2

20V

1W

1PMT4114

CMD333UW C

CMD333UW C

CMD333UW C

CMD333UW C

VOUT

VFDBK

SRC

GN

D

ADJ

CS

SHDN

FB

NDRV

IN

R2

4.02k

R1

10k

C3

0.1µF

50V

R3

100k

C4

0.1µF

25V

R5 1k

R6

100k

R7

50k

VR1

LX432

R4

15Ω

Figure 4

– LXE1992 Boost Evaluation Board Schematic