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Design >> High-Power Design >> Choosing correct load capacitor for SC DC DC Buck converter
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Message started by Vabzter on Sep 5^th, 2011, 11:17pm

Title: Choosing correct load capacitor for SC DC DC Buck converter
Post by Vabzter on Sep 5^th, 2011, 11:17pm

Hello all,
I am designing a Buck DC DC Switch cap converter for 3.3 Vin and 1.8 Vout, load current 10mA. Can anyone give me some references detailing the relation between charge transfer capacitors and load capacitor?

From one IEEE paper it was mentioned that the load capacitor directly affects the output ripple for a particular switching frequency. But is there any relation of Cl with load current, charge transfer caps and any other parameters?

Thank you for your help,
Vab

Title: Re: Choosing correct load capacitor for SC DC DC Buck converter
Post by loose-electron on Sep 14^th, 2011, 12:19pm

Suggest - get out of the IEEE papers and go read some of the industry papers out there on these types of converters. Intersil and others have writeups on how to select these components for their versions of these converters.

Application notes on these products will have writeups.

Title: Re: Choosing correct load capacitor for SC DC DC Buck converter
Post by Vabzter on Sep 14^th, 2011, 7:33pm

Thanks for your suggestions..

Title: Re: Choosing correct load capacitor for SC DC DC Buck converter
Post by loose-electron on Sep 18^th, 2011, 1:41pm

Not a problem. The IEEE is often not the most useful source of information.

Even though I am a chapter chair for the IEEE and I review for the MTT and SSC journals, I generally see that the material that is "practical" never ends up in the IEEE publications.

Title: Re: Choosing correct load capacitor for SC DC DC Buck converter
Post by Arie Aandewiel on Sep 19^th, 2011, 12:27am

loose-electron wrote on Sep 14^th, 2011, 12:19pm:

Could you able to provide any IEEE paper in through this post? Thanks in advance.

Title: Re: Choosing correct load capacitor for SC DC DC Buck converter
Post by loose-electron on Oct 1^st, 2011, 2:59pm

I am not sure what you are asking for. I am saying go read the application notes from industry manufacturers of these products.

Google search!