TM
EV1529DR-00A
Fixed Frequency Step-Up Converter
LCD Backlight Plus Flash Evaluation Board
The Future of Analog IC Technology
TM
GENERAL DESCRIPTION
The EV1529DR-00A evaluation board
is
designed to drive 2 strings of up to 4 backlight
LEDs to 30mA and a 4-LED flash string to
150mA from a single Lithium-Ion battery. The
board is set up to obtain 20mA backlight
current, 40mA preview current and 100mA flash
current. All the LED currents can be adjusted by
resistors RS1, RS2, and RS3 on the evaluation
board.
The MP1529 switches at 1.2MHz and allows
the use of tiny, low cost capacitors and small
inductors. High frequency PWM dimming is
made possible through EN1. The MP1529
includes
built-in
open-LED
over-voltage
protection, cycle-by-cycle current limit, over-
temperature shutdown, input under-voltage
control and integrated soft-start.
FEATURES
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High Efficiency
2.7V to 4.2V Input Voltage Range
Tiny Capacitors and Inductors Due to
1.2MHz Fixed Frequency Operation
LCD Backlight to 30mA, Flash to 150mA
Independent Backlight, Preview and Flash
Current Adjustment
High Frequency PWM Dimming
Surface-Mount Components
Fully Assembled and Tested
PDAs
Cellular Phones
Digital Still Cameras
Digital Video Cameras
APPLICATIONS
ELECTRICAL SPECIFICATIONS
Parameter
Supply Voltage
LED Current (Backlight)
LED Current (Preview)
LED Current (Flash)
Symbol
V
IN
I
LED_BL
I
LED_PV
I
LED_FL
Value
2.7-4.2
20
40
100
Units
V
mA
mA
mA
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
EV1529DR-00A EVALUATION BOARD
(L x W x H) 2.2” x 1.8” x 0.4”
(5.5cm x 4.8cm x 1.0cm)
Board Number
EV1529DR-00A
EV1529DR-00A Rev. 1.0
11/2/2005
MPS IC Number
MP1529DR
1
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
MPS [ MONOLITHIC POWER SYSTEMS ]
