EV1527DR-02A

1.3MHz Low Power

LED Torch/Flash Driver

EVALUATION BOARD

EV1527DR-02A Rev. 1.0

www.MonolithicPower.com

1

9/21/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The

EV1527DR-02A

evaluation

board

is

designed to drive a single Lumileds LED with

low,

forward

voltage

for

Camera

Flash

applications. The board is set up to obtain

150mA torch current and 750mA flash current

with an input voltage range of 3.0V to 4.2V. The

torch and flash currents can be adjusted by

resistors R2 and R3 on the Evaluation Board.

The MP1527 switches at 1.3MHz and allows

the use of tiny, low cost capacitors and small

inductors. External compensation and soft-start

result in small inrush current and extend the

battery life. The MP1527 operates from an input

voltage as low as 2.6V.

ELECTRICAL SPECIFICATIONS

Parameter

Symbol

Value

Units

Supply Voltage

3.0 – 4.2

V

LED Current (Torch)

150

mA

LED Current (Flash)

750

mA

FEATURES

• 3V to 4.2V Input Voltage Range

• Tiny Capacitors and Inductors Due to

1.3MHz Fixed Switching Frequency

• Output LED Currents: 150mA at Torch

Mode, 750mA at Flash Mode

• Surface-Mount Components

• Fully Assembled and Tested

APPLICATIONS

• Camera Phone Flash

• Handheld Computers and PDAs

• Digital Still and Video Cameras

• External Modems

• Small LCD Displays

• White LED Drivers

“MPS” and “The Future of Analog IC Technology” are Registered

Trademarks of Monolithic Power Systems, Inc.

EV1527DR-02A EVALUATION BOARD

(L x W x H) 2.0” x 2.2” x 0.5”

(5.0cm x 5.6cm x 1.0cm)

Board Number

MPS IC Number

EV1527DR-02A

MP1527DR

EV1527DR-02A_WF01

Load Transient

2V/div

5V/div

0

0