MP2481

Active
Buck-Boost WLED Halogen Replacement, up to 5W, Open LED protection, Short LED protection


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Product Description

The MP2481 is a 36V,1.2A,white LED driver suitable for either step-down or inverting step up/down applications. It achieves 1.2A 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 MP2481 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 MP2481 requires a minimum number of readily available standard external components and is available in 8-pin MSOP8 package.

Product Features

  • 1.2A Maximum Output Current
  • Unique Step-up/down Operation (Buck-Boost Mode)
  • Wide 4.5V to 36V Operating Input Range for Step-Down Applications (Buck Mode)
  • 0.30O Internal Power MOSFET Switch
  • Fixed 1.4MHz Frequency
  • Analog and PWM Dimming
  • 0.2V Reference Voltage
  • Up to 95% Efficiency
  • 5µA Shutdown Mode
  • No minimum LED required
  • Stable with Low ESR Output Ceramic Capacitors

Parametrics

  • SyncNo
  • Open LED ProtectionNo
  • PackageMSOP-8E
  • Rds(on) (mΩ)300
  • GradeCatalog
  • TypeBuck-Boost
  • Vfb (V)0.2
  • Vout (max) (V)36
  • fsw (max) (kHz)1400
  • fsw (min) (kHz)1400
  • Iq (mA)0.6
  • Vin (max) (V)36
  • Vin (min) (V)4.5

Evaluation Kit

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Kit details

The EV2481-H-00A is a Buck converter evaluation board for the MP2481, a wide input step-down converter designed for driving high-power white LEDs with up to 1A capability.

The MP2481 is a 1.2A output, 36V white LED driver suitable for either step-down or inverting step-up/down applications. It achieves 1.2A 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 LED protection and output short circuit protection.

The MP2481 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 MP2481 requires a minimum number of readily available standard external components and is available in 8-pin MSOP8 packages.

US$ 25.00 + tax