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WITH HALOGEN LIGHTING ON THE FADE, GET THE IDEAL DRIVER FOR WHITE LEDs!

2009-03-01

With the MP2481 from MPS (MONOLITHIC POWER SYSTEMS), the ideal IC for driving your white LEDs is now available, and it functions as a step-down or step-down/step-up converter.

Operating at up to 1.2A of output current and with a wide input voltage range, the device delivers excellent load and power regulation. Current regulated operation furthermore enables fast regulation characteristics and ease of stabilization. Either a DC signal or a PWM signal at the control input can be used to regulate brightness.

Specifications in Brief:

  • Buck or buck/boost operation
  • Wide input voltage range of 4.5V - 36V
  • Output current of up to 1.2A
  • Internal 0.30? power MOSFET
  • 1.4MHz switching frequency
  • Regulation: analog or PWM
  • Up to 95% efficiency
  • 0.5µA current consumption during shut-down mode
  • Ceramic capacitors for stability
  • Internal protection against overload, temperature, open LED chains, overvoltage and short circuits





A15

Imp_1_2009_A15_MPS_Halogenbeleuchtung_MP2481_Bild_kl.jpg
Imp_1_2009_A15_MPS_Halogenbeleuchtung_MP2481_Bild2_efficiency curve__kl.jpg
Fig.2: Efficiency vs. Input Voltage

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