[ARC5] [Milsurplus] Quieting A DC/DC Converter

[Tom Lee]

Sorry if this has already been discussed, but making the controller go 
at 800Hz isn't the big challenge - it's the magnetics. Core loss is 
proportional to frequency, so going from 50Hz to 800Hz means a 16x 
increase in core loss. Whether that's a problem or not depends on the 
numbers, but in any case, it needs to be taken into account.

Tom

-- 
Prof. Thomas H. Lee
Allen Bldg., CIS-205
420 Via Palou Mall
Stanford University
Stanford, CA 94305-4070
http://www-smirc.stanford.edu
650-725-3383 (public fax; no confidential information, please)

On 1/21/2018 11:08 AM, Tom B wrote:
>
>
> Here is a link to a schematic using the IR2153. 
> http://danyk.cz/menic230_4_en.html
> It looks pretty simple to change the frequency.
>
> Tom
>
>
>
>
> On 1/21/2018 11:21 AM, David Stinson wrote:
>>
>> Anyone have the link to the schematic?
>>
>> *From:*arc5-bounces at mailman.qth.net 
>> [mailto:arc5-bounces at mailman.qth.net] *On Behalf Of *Bob kb8tq
>> *Sent:* Sunday, January 21, 2018 8:14 AM
>> *To:* J Mcvey
>> *Cc:* arc5 at mailman.qth.net
>> *Subject:* Re: [ARC5] [Milsurplus] Quieting A DC/DC Converter
>>
>> Hi
>>
>> Here’s a guy with a schematic of the same thing running a 2153. I’d 
>> bet what is on
>>
>> the board is pretty close to what he shows.
>>
>> Bob
>>
>>
>>
>> On Jan 21, 2018, at 9:09 AM, J Mcvey via ARC5 <arc5 at mailman.qth.net 
>> <mailto:arc5 at mailman.qth.net>> wrote:
>>
>> By the spec sheet for the IR2153D, you absolutely can run it at 800 Hz.
>>
>> Just change the R-C values accordingly.
>>
>> On Sunday, January 21, 2018 1:19 AM, Peter Gottlieb <kb2vtl at gmail.com 
>> <mailto:kb2vtl at gmail.com>> wrote:
>>
>> Not sure what chip they use on the thing and how freq is set. Anyone 
>> have one
>> and can let us know what the 8 pin DIP is?
>>
>>
>> On 1/21/2018 12:50 AM, JOHN MCCARTY wrote:
>> > This is cool. My question is: can we up-scale the thing and make it 
>> run at 800hz??
>> >
>> > 73
>> >
>> > n9hrt
>>
>
>
>
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