EV2483DQ-00B
2.5A, 55V, Programmable Frequency
White LED Driver Evaluation Board
EV2483DQ-00B Rev.1.0 www.MonolithicPower.com 1
11/23/2009 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP2483 is a 55V, 2.5A, white LED driver
suitable for either step-down or inverting
step-up/down applications. It achieves 2.5A
peak output current over a wide input supply
range with excellent load and line regulation.
Current mode operation provides fast transient
response and eases loop stabilization. Fault
condition protection includes thermal shutdown,
cycle-by-cycle peak current limiting, input over
voltage protection, open strings protection and
output short circuit protection.
The MP2483 incorporates both DC and PWM
dimming onto a single control pin. The separate
input reference ground pin allows for direct
enable and/or dimming control for a positive to
negative power conversion.
The MP2483 requires a minimum number of
readily available standard external components
and is available in 10-pin 3mm x 3mm QFN
packages.
MP2483DQ DEMO BOARDS
Board number
Operating
Mode
Input
(V)
LED
#
I
LED
(mA)
EV2483DQ-00A Buck 15~50 3 700
EV2483DQ-00B
Buck-
boost
12 3~5 500
EV2483DQ-00C Boost 12 6~9 500
FEATURES
2.5A Maximum Output Current
Unique Step-up/down Operation (Buck-
Boost Mode)
Wide 4.5V to 55V Operating Input Range for
Step-Down Applications (Buck Mode)
0.28Ω Internal Power MOSFET Switch
Adjustable Switching Frequency
Analog and PWM Dimming
0.198V Reference Voltage
5μA Shutdown Mode
No minimum LED required
Stable with Low ESR Output Ceramic
Capacitors
Cycle-by-Cycle Over Current Protection
Thermal Shutdown Protection
Open Strings Protection
Input Over Voltage Protection
Output Short Circuit Protection
Available in 10-Pin 3x3mm QFN Package
APPLICATIONS
General LED Illuminations
LCD Backlight Panels
Handheld Computers
Automotive Internal Lighting
Portable Multimedia Players
Portable GPS Devices
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Monolithic Power Systems, Inc.