MP2483
   
2.5A, 55V, Programmable Frequency White LED Driver
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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, cycle­by­cycle 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 a 10-pin 3mm x 3mm QFN package.

 
FEATURES
DOCUMENTS
  • 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
 
Product Datasheets
 MP2483 
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