DHT Heater Group Buy notes.

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Andrew
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Re: DHT Heater Group Buy notes.

Post by Andrew » Mon Jun 17, 2019 11:30 am

I should add that I have not had any reports of the non-epoxy cap breaking on the PCBs in the field. Doesn't mean it hasn't happended but I've not heard about it....if it has.
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Mike H
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Re: DHT Heater Group Buy notes.

Post by Mike H » Mon Jun 17, 2019 12:09 pm

Fascinating.

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izzy wizzy
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Re: DHT Heater Group Buy notes.

Post by izzy wizzy » Fri Jun 21, 2019 8:29 am

The diodes DSB10I45PM are hard to get or on long back order from Farnell
https://uk.farnell.com/ixys-semiconduct ... w%2Fsearch.

I found these
https://uk.farnell.com/stmicroelectroni ... dp/2325859

I know they're duals so I figured I could use 3; the common cathode being used for the positive leg of the bridge and use them as singles for the negative leg. I thought they were close in spec to the originals if I'm looking at the right things; a low Vf fer instance.

These are a small signal schottky like the originals. What is the difference between a small signal schottky and a schottky rectifier?

If these were OK, they have a low Vf and I'm using only 5VAC in for 2.1V out to 4P1L
https://uk.farnell.com/stmicroelectroni ... dp/9803360

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Stephen

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Nick
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Re: DHT Heater Group Buy notes.

Post by Nick » Fri Jun 21, 2019 8:45 am

I use these all the time

https://uk.farnell.com/stmicroelectroni ... t=STPS1045

Slightly higher Vf, but don't know if 60mv matters.
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izzy wizzy
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Re: DHT Heater Group Buy notes.

Post by izzy wizzy » Fri Jun 21, 2019 9:33 am

Nick wrote:
Fri Jun 21, 2019 8:45 am
I use these all the time
https://uk.farnell.com/stmicroelectroni ... t=STPS1045
Slightly higher Vf, but don't know if 60mv matters.
Thanks Nick. I've gone with these,

Andrew
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Re: DHT Heater Group Buy notes.

Post by Andrew » Fri Jun 21, 2019 11:44 am

Yep, Nick's suggestion should be fine :)
Analogue, the lost world that lies between 0 and 1.

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