AN4350 datasheet(1/34 Pages) STMICROELECTRONICS

Part #	AN4350

Description	High power factor LED driver with constant voltage regulation based on HVLED815PF

PDF	34 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 34 page

February 2014

DocID025181 Rev 1

1/34

AN4350

Application note

High power factor LED driver with constant voltage regulation based

on HVLED815PF

Giovanni Gritti

Introduction

The EVLHVLED815W8CV demonstration board shows how to implement a high power

factor LED driver with a constant voltage regulation, using the single-stage primary side

HVLED815PF controller.

The HVLED815PF device is an integrated power controller with primary side control to

achieve the LED current regulation within ± 5%.

It also has a primary side voltage regulation and this AN shows how to reach the high power

factor with the constant voltage (CV) regulation.

The device incorporates an 800 V avalanche rated FET and fits in a standard SO-16

package. An internal start-up circuit eliminates the need for an external start circuitry

reducing the component counts/space and increases system efficiency.

Figure 1. Demonstration board - top side view

www.st.com

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