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LYTSWITCH LYT5218/28D driver question

Posted by: Arsen Ghambaryan on

Hello,

I planned to design dimmable Constant Current LED driver, using PWM via MCU with BLE network. AC input 100..277VAC, Isolated flyback. Outputs: power 20..30W, voltage approximately 20..55VDC, maximum output current 500mA.

I interested in LYT5218/28D drivers.

It's given on LYTSWITCH-5 web page, that the above mentioned drivers are dimmable(analog, pwm or 0..10V), but, unfortunately, i didn't find any ref.designs or application notes, how can i calculate or design project with above mentioned parameters.

My question is following...

Is it possible to create Dimmable Constant Current LED driver using LYT5218/28D?

If Yes, please send any document, how design it.

If No, which other IC-s are reccommended to create design with these requirements.

Beforehand thanks,

Arsen Ghambaryan

回應

Submitted by PI-Zek on 01/24/2022

Hi Arsen,

Thank you for your interest in LYTSwitch-5 device.

Please find the application note here: https://www.power.com/sites/default/files/documents/an65.pdf

Other reference design can be found here: https://www.power.com/products/lytswitch/lytswitch-5

If you need a tool for the magnetics, you can use the PI Expert Design: https://piexpertonline.power.com/site/index

If you need more resources on dimmable LED driver, you may consider using LYTSwitch-6 for your design which has more reference design examples using 3-in-1 dimming (which includes PWM dimming).

https://www.power.com/products/lytswitch/lytswitch-6

Submitted by Arsen Ghambaryan on 01/25/2022

 

I saw this application note an65, but, unfortunately, didn't find, how to design dimming section. 

and there are no any reference design with dimming options on LYTSwitch-5. Correct me, if I mistaken.

About Lytswitch-6, Yes, we will try to use these parts, if lytswitch-5 is not be able to correspond our requirements. 

In any case, thank you very much Zek!!!

Regards, Arsen