ON Semiconductor

Demoboard DN05041/D

85-115 Vac Buck LED Driver

Topology: Buck
Input Voltage (min.): 85.00 V
Input Voltage (max.): 115.00 V
Output 1: 60.00 V / 0.060 A

Original publication on 2013-05-14, revision 2 on


As LED lighting grows in the general lighting market, cost pressure increases as the volumes grow. Performance is weighted against cost especially for low power applications.LED manufacturers are developing high voltage LEDs whose voltage is more closely matched to the line voltage and thus supports high conversion efficiency with low line ripple.This makes the CrM buck topology an excellentarchitecture as an LED driver for the following reasons: Low RMS Current Stress on the FET and Output Diode since the Current is Much Lower for the HV LEDs and the Duty Cycle to Relatively High Low Current Stress Allows the Use of Smaller FETS and Diodes Leading to Optimum Bill-of-material (BOM) Cost Standard Mass Produced Inductors Can also be Used which Further Supports a Cost Effective Design


  • Operation of the NCL30002 CrM controller for buckoperation is detailed in AND9094D. While that application note describes how the device can be used to implement a high power factor buck implementation, this design note will describe a low ripple configuration.Please note the input bulk capacitor was sized to comply with JIS61000−3−2 Class C (Japan), but the same basic design can be used for other lower voltage mains regions like US, Canada, and Latin America for example where that standard does not apply.


  Order Code SPEC Product series L
RDC max.
RDC typ.
7447462101 PDF WE-TI Radial Leaded Wire Wound Inductor 100 0.8 0.65 0.457 7.1