Increase the Power capabilities of STEVAL-ILD004V1

ericeric9 · ‎2015-10-12

Posted on October 12, 2015 at 20:29

I need to support a 2-wire 500W dimmer instead of just a 300W dimmer at 110VAC 60Hz US.

What are the power limiting components of the ST Dev Kit?

The 2 1N5404 diodes are only rated for 3A which would be 360W. Is this the limiting component?

Can I instead use something like

http://www.digikey.com/product-detail/en/S5GC-13-F/S5GC-FDICT-ND/765461

which is a 5A 400V diode or even a 200V diode since I don't need to support 240VAC (this is a US only product).

Thanks in advance...

Eric

neilandrewross · ‎2016-01-13

Posted on January 13, 2016 at 09:34

Eric,

Apologies, but I cannot answer your question but I am interested in your feedback on the performance of the development board in its standard form.

Does it perform well?

Thanks,

Neil

Benoit RENARD · ‎2016-12-01

Posted on December 01, 2016 at 11:22

Hello Eric,

I think that my answer comes too late, but it can help other people...

The limiting point is the withstanding level of diodes in term of overcurrent during surge event, i.e. a 8/20 us current waveform, as described by the IEC61000-4-5 standard (cf user manual UM1597, paragraph 2.8).

Then be sure that your diode is withstanding your application surge requirement.

Sure, additionnally, keep the diodes junction temperature below their max temperature.

Same for the SCRs sure, the heatsink is designed for a 300 W / 120 V application.

You can also use a stronger SCR, as the TS1220-600T, in TO220 but non-insulated.

Hope it will help.

Best Regards

Benoit