ON Semiconductor


Ac-Dc Combination Power Factor Correction & Quasi-Resonant Flyback Controller optimized for LED Lighting

Topology: Other
Switching Frequency (min.): 23.50 kHz
Switching Frequency (max.): 30.50 kHz

Original publication on 2015-03-05, revision 1 on


This combination IC integrates power factor correction (PFC) and quasi−resonant flyback functionality necessary to implement a compact and highly efficient LED driver for high performance LED lighting applications.The PFC stage utilizes a proprietary multiplier architecture to achieve low harmonic distortion and near−unity power factor while operating in a Critical Conduction Mode (CrM). The circuit incorporates all the features necessary for building a robust and compact PFC stage while minimizing the number of external components.The quasi−resonant current−mode flyback stage features a proprietary valley−lockout circuitry, ensuring stable valley switching. This system works down to the 4th valley and toggles to a frequency foldback mode with a minimum frequency clamp beyond the 4th valley to eliminate audible noise. Skip mode operation allows excellent efficiency in light load conditions while consuming very low standby power consumption.


  • Wide VCC Range from 9 V to 30 V with Built−in OvervoltageProtection
  • High−Voltage Startup Circuit
  • Integrated High−Voltage Brown−Out Detector
  • Fault Input for Severe Fault Conditions, NTC Compatible (Latch and Auto−Recovery Options)
  • 0.5 A / 0.8 A Source / Sink Gate Drivers
  • Internal Temperature Shutdown


  Order Code SPEC Product series L1
LS 1
(V (AC))
Montageart L1
IR 1
RDC1 typ
RDC1 max.
fres 1
750314657 PDF Offline Transformer
750341632 PDF MID-DC16US Common Mode Choke 3.3 5 0.19 90 2011 THT
7447471330 PDF WE-TIS Radial Leaded Wire Wound Inductor 2.8 THT 33 3.6 0.05 0.061 10
7447471101 PDF WE-TIS Radial Leaded Wire Wound Inductor 1.4 THT 100 1.6 0.15 0.19 3.9

Other applications and Würth Elektronik products for this IC

  • NCL30030
    Topology: Flyback, Input Voltage (min.): 90.00 V, Input Voltage (max.): 305.00 V, Switching Frequency (min.): 23.50 kHz, Switching Frequency (max.): 30.50 kHz, Output 1: 210.00 V / 0.710 A