EV2483DQ-00A
2.5A, 55V, Progr ammable Frequency
White LED Driver Evaluation Board
EV2483DQ-00A Rev.1.0 www.MonolithicPower.com 1
04/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2013 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#
ILED
(mA)
EV2483DQ-
00A
Buck
15~5
0
3 700
EV2483DQ-
00B
Buck-boost 12 3~5 500
EV2483DQ-
00C
Boost 12 6~9 500
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Input Voltage V
IN
15~50 V
LEDs # 3
LED Current I
LED
700 mA
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 3x3 QFN Package
APPLICATIONS
• General LED Illuminations
• LCD Backlight Panels
• Handheld Computers
• Automotive Internal Lighting
• Portable Multimedia Players
• Portable GPS Devices
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks
of Monolithic Power Systems, Inc.
