Microsemi

Integrated Products Division

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

Page 8

Copyright

© 2000

Rev. 1.0b, 2005-03-03

LX1993

High Efficiency LED Driver

I N T E GRA T ED

PR ODUC T S

Table 3: Factory Installed Component List for the LX1993 Evaluation Board

Quantity

Part

Reference

Description

Manufacturer

Part

Number

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

R3

Resistor, 590K, 1/16W, 0603 Type SMT

Panasonic

ERJ3EKF5903

1

R2

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

Panasonic

ERJ3EKF1000

2

R6, R8

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

Panasonic

ERJ3EKF1003

1

R1, R5

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, 20V, 1W Powermite Type SMT

Microsemi

1PMT4114

4

LED1 - 4

White LED

Chicago Miniature

CMD333UWC

5

JB1 - JB3

Header, 3 Pos Vertical Type

3M

929647-09-36

5

Jumper

3M

929955-06

Note: The minimum set of parts needed to build a working power supply are: CR1, L1, C1, C2, R2, R4, U1. Evaluation board P/L subject to change

without notice.

VBAT

VADJ

VCC

VPOT

GND

VCC

SHDN

VADJ

VPOT

C1

4.7µF

25V

L1

47µH

CR1

UPS5817

C2

4.7µF

25V

VR2

20V

1W

1PMT4114

CMD333UWC

CMD333UWC

CMD333UWC

CMD333UWC

VOUT

VFDBK

R1

10k

C3

0.1µF

50V

R3

590K

C4

4.7µF

25V

R5 10k

R6

100k

R7

50k

VR1

LX432

R4

15Ω

OUT

GND

ADJ

CS

FB

SW

IN

SHDN

R2

100Ω

R8

100K

LED4 LED3

ON

OFF

Figure 4

– LXE1993 Boost Evaluation Board Schematic