LED AC driver transformer or inductor

[yassin.kraouch]

Hello,
i want to know how we drive LED from mains ? did we have to use a transformer and after that use DC voltage to drive LED ?
or we have to use coupled inductor ?
what is the better solution ?

 

[tpetar]

Hello,
i want to know how we drive LED from mains ? did we have to use a transformer and after that use DC voltage to drive LED ?
or we have to use coupled inductor ?
what is the better solution ?

Use small SMPS for this.

This SMPS can be very small and on output give regulated DC voltage for LED-LEDs.

I dont suggest transformerless designs.



Best regards,
Peter

 

[yassin.kraouch]

have you a reference design on how to do this ? i need an example, it is for my own project at home, but i want to do a professional one, SMPS, but the problem i have no idea on how to do that

 

[tpetar]

have you a reference design on how to do this ?

No but if you insist, here is:

:smile:


SSL152x SMPS ICs for mains LED drivers - Check attachment

Buck Converter Based On Viper12a
http://www.datasheetdir.com/An-Alte...Converter-Based-On-Viper12a+Application-Notes

Simplest switched power supply ever with TNY263 - TNY268
http://danyk.cz/impulz4_en.html

3,4V 2,5A switching supply with optocoupler
http://danyk.cz/impulz_en.html

Best regards,
Peter

:wink: