MP2483 Datasheet, PDF (1/14 Pages) Monolithic Power Systems – 2.5A, 55V, Programmable Frequency White LED Driver

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.
MP2483
2.5A, 55V, Programmable Frequency
White LED Driver
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
• 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 Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
VIN
4.5V<VIN<55V
C1
10
OFF ON
DC or PWM Input
VDD OVP
BST
SW
MP2483
EN/DIM
INGND
FB
VSS COMP RSET
R4
C3
L1
R3
100nF 4.7
D1
C2
B360A
2.2
C4
C5
R1
1nF ^R2
1nF
MP2483 Rev. 1.0
www.MonolithicPower.com
1
12/25/2013
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