Author Topic: Siglent electronic load question  (Read 215 times)

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Offline Spike

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Siglent electronic load question
« on: September 20, 2020, 11:13:53 pm »
Hey all,

I'm considering the purchase of one of the Siglent electronic loads, probably the SDL1020X or X-E, and I have a question about something I saw in the datasheet.

At the bottom of the Program Function section, there is a sentence that reads, "Auto-test function is especially useful in the designing battery charging circuitry."  Even though I'm not considering it specifically for this purpose, I do happen to be building a charging circuit into a current project and this made me curious.

My question is, what is the basis for this statement.  I was under the impression that for this sort of testing required either additional (voltage source) or specialized (battery emulator-ish-y thing) equipment.  Has anyone used this load for testing charging circuits or know specifically what features of the Siglent load make it useful for this?  Is there a configuration utilizing additional equipment that is not specifically stated here?  I can find no other reference to this in the other documentation for this load.

Thanks in advance
 

Offline tautech

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Re: Siglent electronic load question
« Reply #1 on: September 21, 2020, 12:08:03 am »
I think your question is answered in this app note:
https://siglentna.com/application-note/power-supply-design-load-step/

Where a SDL is just one part of a PSU test system and refers to programming of the SDL to apply the necessary load parameters to a PSU to ensure it behaves as expected under its design brief.
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Offline Spike

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Re: Siglent electronic load question
« Reply #2 on: September 21, 2020, 12:47:46 am »
I saw that but didn't think it applied because of the changing battery voltage during the charging process.  I'll look again but is that accounted for in this application note?

The note doesn't mention the Program mode specifically and I was wondering why that specific comment was made in regard to that mode.  They don't elaborate on what about the program mode lends itself to charging circuit testing.  Oh, well, just wondering.
« Last Edit: September 21, 2020, 12:55:44 am by Spike »
 

Offline tautech

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Re: Siglent electronic load question
« Reply #3 on: September 21, 2020, 01:50:34 am »
I saw that but didn't think it applied because of the changing battery voltage during the charging process.
Depends entirely on the battery chemistries involved.
7 stage chargers are common these days that also accommodate support for 2 or more battery chemistries.
Each step between charging stages needs to proved as reliable/stable so devices like SDL need provide these capabilities. 

A smart 12V charger I've just repaired had 7 stages and supported LA, CaLA and SLA.
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