Accueil> Blog> Constant power LED driver architecture reduces cost for offline LED ballasts

Constant power LED driver architecture reduces cost for offline LED ballasts

August 25, 2022
In his fourth article on ballasts, Iain Mosely describes how the constant power operation inherent in a peak-current-controlled discontinuous mode flyback converter can deliver good drive characteristics for LED applications. For high brightness LED technology to succeed in replacing standard incandescent bulbs for high Volume markets, the cost of the drive electronics required to power the LEDs must be kept to a minimum. This article, the fourth in a series discussing LED ballast design, presents a solution that exploits a novel constant power flyback converter architecture. An ultra low cost 7W offline LED ballast that will run from 85?C265Vac at 50/60Hz.
The actual LED current is measured using a sense resistor and is used to control the duty Cycle of the primary side switching element. Although this gives excellent LED current regulation, the feedback circuitry requires an optocoupler, shunt reference, and sense resistor, all of which add cost and reduce overall efficiency.
+++++++
This article was published in the April 2008 issue of LEDs Magazine.
To read the full version of this article, please visit our Magazine page, where you can download FREE electronic PDF versions of all issues of LEDs Magazine.
Nous contacter

Author:

Mr. Wayne Tang

Phone/WhatsApp:

+886916140279

Produits populaires
You may also like
Related Categories

Envoyer à ce fournisseur

Sujet:
E-mail :
message:

Your message must be betwwen 20-8000 characters

Nous contacter

Author:

Mr. Wayne Tang

Phone/WhatsApp:

+886916140279

Produits populaires

Accueil

Product

Whatsapp

À propos de nous

Demande

We will contact you immediately

Fill in more information so that we can get in touch with you faster

Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.

envoyer