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Old 11th November 2010, 08:12 AM   #11
AndrewL is offline AndrewL  United Kingdom
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Hi Jackinnj,

Do you have a specific part number in mind?

many thanks,

Andrew
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Old 11th November 2010, 08:29 AM   #12
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I've been using a similar DC-DC converter for the last couple of years and find them indispensable. They are compact, reasonably well regulated, and the small ripple on the output cleans up nice with a simple CLC filter.

Mine are BWR-15/330-D12A which take a 9-18VDC input. I bought quite a few of them off some telecom dude for about $10 each; they sell for almost $90 new.

Digi-Key - 811-1723-5-ND (Manufacturer - BWR-15/330-D12A-C)

I consider them my little black bars of gold.
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Old 11th November 2010, 08:43 AM   #13
AndrewL is offline AndrewL  United Kingdom
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Sorry thanks, I was thinking about the mH choke, my fault should have been more specific.
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Old 12th November 2010, 04:59 PM   #14
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I tried using some lower ESR electrolytics and put them on the inputs and outputs of the 24-> +/- 15V converter (should heed my own advice and read the datasheet!) -- or you can bypass with a 100nF ceramic, or use a tantalum. The noise on the input rail is down in the uVolts.
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Old 12th November 2010, 05:21 PM   #15
Boofers is offline Boofers  Canada
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Hey that NDTD2415C is a nice little package, especially for the price. Thanks for the info!
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Old 20th November 2010, 05:38 AM   #16
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Quote:
Originally Posted by jackinnj View Post
I tried using some lower ESR electrolytics and put them on the inputs and outputs of the 24-> +/- 15V converter (should heed my own advice and read the datasheet!) -- or you can bypass with a 100nF ceramic, or use a tantalum. The noise on the input rail is down in the uVolts.
With or without the 12mH choke that you included in your earlier measurement? I'm putting together Pete's design, and wondering if I should find a place to mount a small choke on the input.
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Old 20th November 2010, 09:03 AM   #17
AndrewL is offline AndrewL  United Kingdom
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Quote:
Originally Posted by EchoWars View Post
With or without the 12mH choke that you included in your earlier measurement? I'm putting together Pete's design, and wondering if I should find a place to mount a small choke on the input.
I'm also putting together Pete's from end and that was my thought exactly, is a small choke the way to go and, if so, what part #?

thanks,

Andrew
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Old 20th November 2010, 09:49 AM   #18
AndrewL is offline AndrewL  United Kingdom
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Quote:
Originally Posted by EchoWars View Post
With or without the 12mH choke that you included in your earlier measurement? I'm putting together Pete's design, and wondering if I should find a place to mount a small choke on the input.
Whoops that didn't type right! I'll try again....

I'm also putting together Pete's SC interface and was basically wondering the same thing? Do I add a choke and, if so, what one, can anyone recommend a part #?

thanks,

Andrew
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Old 28th November 2010, 12:57 AM   #19
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Well, I've ordered a small 150H choke (rated for 1.1A), and depending on how the board gets mounted in the chassis, I plan on adding it to the input of the unit...right before the 470f 16V cap.

Last edited by EchoWars; 28th November 2010 at 01:01 AM.
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Old 28th November 2010, 09:17 AM   #20
AndrewL is offline AndrewL  United Kingdom
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H,i Could you post the part number for that link, Digikey just gives me a blank page when I click on it.

much appreciated.

Andrew
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