AN4346 Datasheet, PDF (1/33 Pages) STMicroelectronics – 10 W wide range - high power factor - isolated LED driver using HVLED815PF

AN4346
Application note
10 W wide range - high power factor - isolated LED driver using
HVLED815PF
By Giovanni Gritti
Introduction
This application note describes the performances of an isolated 10 W, wide range, regulated
LED driver using the HVLED815PF device, with a high power factor and a constant output
current regulation. Main input specifications are:
 Input voltage:
88 - 265 Vac
 Isolated solution (flyback topology)
 Output power:
10 W
 Output LED voltage (typ.):
22 V
 Output LED current (typ.):
455 mA
 Power factor:
> 0.95
 LED driver efficiency:
up to 84%
The architecture is based on a single stage isolated flyback and it has been used the
STMicroelectronics^® HVLED815PF device with primary side control to achieve a LED
current regulation within ± 5% and a high power factor.
The form factor has been designed to fit into a standard lighting case making easy the
replacement of the incandescent lamp.
Figure 1. EVLHVLED815W10F demonstration board
October 2013
DocID025107 Rev 1
1/33
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