Industrial Grade, 55V, 2.5A Programmable Frequency LED Driver



The MPQ2483A is a 55V LED driver suitable for either step-down or inverting step‑up and step-down applications. It achieves a 2.5A peak current with excellent load and line regulation over a wide input supply range.

The MPQ2483A incorporates both DC and PWM dimming into a single control pin. The separate input reference ground allows for direct enable and dimming control for positive-to-negative power conversion.

Current-mode operation provides fast transient response and eases loop stabilization. Full protection features include cycle­-by­cycle peak current limiting, output over-voltage protection (OVP), open-string protection, output short-circuit protection (SCP), and thermal shutdown.

The MPQ2483A requires a minimal number of readily available, standard, external components and is available in 10-pin QFN (3mmx3mm) and 14-pin SOIC14 packages.


  • 2.5A Maximum Peak Current
  • Buck or Buck-Boost Modes
  • Wide 4.5V to 55V Operating Input Range
  • 0.28Ω Internal Power MOSFET Switch
  • Analog and PWM Dimming
  • 0.198V Reference Voltage
  • 5μA Shutdown Mode
  • Stable with Low ESR Capacitors
  • Cycle-by-Cycle Over-Current Protection (OCP)
  • Thermal Shutdown, Over-Voltage (OVP), Short–Circuit (SCP), and Open-String Protection
  • AEC-Q100 Qualified


  • Vin (min) (V)4.5
  • Vin (max) (V)55
  • Vout (max) (V)55
  • Iout (max) (A)2.5
  • SyncNo
  • Open LED ProtectionYes
  • Rds(on) (mΩ)280
  • GradeIndustrial
  • PackageQFN-10 (3x3), SOIC-14
  • Vfb (V)0.198
  • fsw (max) (kHz)1350
  • Iq (mA)0.8
  • Ishutdown (µA)3.4