MPS EV2483DQ-00C Manual

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
EV2483DQ-00A
EV2483DQ-00B
EV2483DQ-00C
ELECTRICAL SPECIFICATIONS
Parameter
Input Voltage
LEDs #
LED Current
EV2483DQ-00C Rev.1.1
04/26/2010
Arrow.com.
Downloaded from
Operating Input
LED#
Mode (V)
Buck 15~50
Buck-boost 12 3~5
Boost 12 6~9
Symbol Value
V 12
IN
6~9
I 500
LED
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2.5A, 55V, Programmable Frequency
White LED Driver Evaluation Board
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
ILED
•
Handheld Computers
(mA)
•
Automotive Internal Lighting
3 700
•
Portable Multimedia Players
500
•
Portable GPS Devices
500
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Monolithic Power Systems, Inc.
Units
V
mA
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EV2483DQ-00C
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