Primary Side Control Offline Non-Isolated LED Controller with Active PFC

Talk to an Engineer or get a Quote

Product Description

The MP4051 is a non-isolated offline LED lighting controller that achieves high power factor and accurate LED current for single-stage PFC lighting applications in a single SOIC8 package. The MP4051 integrates power factor correction and works in boundary conduction mode to reduce the MOSFET switching losses. The extremely low start-up current and quiescent current reduces the total power consumption and provides a high-efficiency solution for non-isolated lighting applications. The multi-protection features of MP4051 greatly enhance system reliability and safety. The MP4051 features over-voltage protection, short-circuit protection, cycle-by-cycle current limiting, VCC UVLO, and auto-restart over-temperature protection.

Product Features

  • Unique Architecture for Superior Line Regulation
  • Achieve
  • High Power Factor=0.9 Over Universal Input Voltage
  • Boundary Conduction Mode improves Efficiency
  • Ultra-low (20µA) Start-up Current


  • SyncNo
  • Open LED ProtectionYes
  • GradeCatalog
  • TypeBuck-Boost
  • PackageSOIC-8
  • Vfb (V)0.4
  • Vac (max) (V)305
  • fsw (max) (kHz)333
  • Pout (max) (W)40
  • Vac (min) (V)85
  • Iq (mA)0.75
  • Ishutdown (µA)20
Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.