MP2483
2.5A, 55V, Programmable Frequency
White LED Driver
MP2483 Rev. 1.0 www.MonolithicPower.com 1
12/25/2013 MPS Proprietary Information. Patent Protected. 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, 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
package and 14-pin SOIC14 packages.
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)
• 0.28 Internal Power MOSFET Switch
• Adjustable Switching Frequency
• Analog and PWM Dimming
• 0.198V Reference Voltage
• 5A 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
• Output Short Circuit Protection
• Available in 10-Pin 3x3 QFN Package and
14-Pin SOIC14 Package
APPLICATIONS
• General LED Illuminations
• LCD Backlight Panels
• Handheld Computers
• Automotive Internal Lighting
• Portable Multimedia Players
• Portable GPS Devices
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Quality Assurance. “MPS” and “The
Future of Analog IC Technology” are Registered Trademarks of Monolithi
Power Systems, Inc.
TYPICAL APPLICATION
VDD OVP BST
SW
FB
RSETCOMP
MP2483
VSS
INGND
EN/DIM
OFF
ON
L1
4.7
C3
100nF
D1
B360A
C2
2.2
C1
10
VIN
4.5V<VIN<55V
C4
1nF
DC or PWM Input
R1
R2
R3
C5
1nF
R4