MP2483 4.5-55V, 2.5A Programmable Frequency White LED Driver SOIC14

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MP2483 4.5-55V, 2.5A Programmable Frequency White LED Driver SOIC14

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MPS LED Drivers LED Power Management SOIC14

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MP2483 4.5-55V, 2.5A Programmable Frequency White LED Driver SOIC14

The MPS MP2483 is a Programmable Frequency White LED Driver. It operates from a 4.5 V to 55 V input and is rated for 2.5 A. It is supplied in a SOIC14 package.

The MP2483 is a 55V, 2.5A, white LED driver suitable for either step-down or inverting step-up/down applications.

Key Specifications

Part Number	MP2483
Function	Programmable Frequency White LED Driver
Input Voltage	4.5 V to 55 V
Current Rating	2.5 A
Interface	PWM
Package	SOIC14
Ordering Codes	MP2483

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

Typical Application Circuit

Applications

General LED Illuminations
LCD Backlight Panels
Handheld Computers
Automotive Internal Lighting
Portable Multimedia Players

Design Notes

Channel-to-channel current matching sets backlight uniformity; check the matching spec at the current you will actually run.
In boost topologies the OVP threshold must clear the worst-case forward voltage of the longest string, including temperature and binning spread.
Keep PWM dimming above 200 Hz to stay clear of visible flicker, and away from the audio band if the product has a speaker.
Size the inductor and output capacitor for the string current ripple, not the total LED current.