55V, 2.5A Programmable Frequency LED Driver with AEC-Q100 Qualified



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 cycle­by­cycle 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
  • 0.28O 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


  • SyncNo
  • Open LED ProtectionYes
  • PackageQFN-10 (3x3), SOIC-14
  • Rds(on) (mΩ)280
  • GradeAutomotive
  • TypeBuck-Boost, Low-Side Buck
  • Vfb (V)0.198
  • Vout (max) (V)55
  • fsw (max) (kHz)1350
  • Iq (mA)0.8
  • Iout (max) (A)2.5
  • Vin (max) (V)55
  • 最小输入电压4.5
  • Ishutdown (µA)3.4
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