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 V
IN
3.0 – 4.2 V
LED Current (Torch) I
OUT1
150 mA
LED Current (Flash) I
OUT2
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
V
IN
= 3.6V (1 LED)
V
FLASH
2V/div
V
OUT
5V/div
0
0
