MP24833

NRFND
3A,55V,White LED Driver


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Product Description

The MP24833 is a 55V, 3A, white LED driver suitable for step-down, inverting step up/down and step-up applications. It achieves 3A 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, open strings protection and output short circuit protection. The MP24833 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 MP24833 requires a minimal number of readily-available standard external components and is available in an SOIC8E package.

Product Features

  • 3A Maximum Output Current
  • Unique Step-Up/Down Operation (Buck-Boost Mode)
  • Wide 4.5V-to-55V Operating InputRangefor Step-Down Applications (Buck Mode)
  • 0.19Ω Internal Power MOSFET Switch
  • Fixed 200kHz Switching Frequency
  • Analog and PWM Dimming
  • 0.198V Reference Voltage
  • 6μA Shutdown Mode
  • No Minimum Number of LEDs 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 an SOIC8E Package

Parametrics

  • Vin (min) (V)4.5
  • Vin (max) (V)55
  • Vout (max) (V)55
  • Iout (max) (A)3
  • SyncNo
  • Open LED ProtectionYes
  • PackageSOIC-8E
  • Rds(on) (mΩ)190
  • GradeCatalog
  • TypeBuck, ,Buck-Boost
  • Vfb (V)0.198
  • fsw (max) (kHz)200
  • Iq (mA)0.6
  • Ishutdown (µA)6

Reference Materials