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tech / sci.electronics.design / Re: Cheap pulse 1:1 transformer

Re: Cheap pulse 1:1 transformer

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From: jl...@650pot.com (john larkin)
Newsgroups: sci.electronics.design
Subject: Re: Cheap pulse 1:1 transformer
Date: Mon, 13 Nov 2023 14:51:29 -0800
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by: john larkin - Mon, 13 Nov 2023 22:51 UTC

On Fri, 10 Nov 2023 08:37:45 -0800 (PST), Fred Bloggs
<bloggs.fredbloggs.fred@gmail.com> wrote:

>On Thursday, November 9, 2023 at 6:14:58?PM UTC-5, Klaus Kragelund wrote:
>> Hi
>>
>> I am on the lookout for a cheap 1:1 pulse transformer. Will be using it to drive a MOSFET based Solid State Switch.
>>
>> I know Larkin has used the DRQ127
>>
>> https://www.digikey.dk/en/products/detail/eaton-electronics-division/DRQ127-1R5-R/667262
>>
>> But, I am looking to see if I can find bottom dollar.
>>
>> I probably wont go to LCSC, so would prefer a known brand.
>>
>> Anyone got a recommendation?
>
>If you're looking for cheap, you can't beat capacitor coupling the gate drive. Phillips has a whole chapter in their MOSFET applications handbook on how to do this reliably-wasn't in the market for the technique at the time and skipped it.
>\

One problem is achieving safe isolation from the 230 VAC power lines.

Re: Cheap pulse 1:1 transformer

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From: ali...@comet.invalid (Jan Panteltje)
Newsgroups: sci.electronics.design
Subject: Re: Cheap pulse 1:1 transformer
Date: Tue, 14 Nov 2023 06:17:58 GMT
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by: Jan Panteltje - Tue, 14 Nov 2023 06:17 UTC

On a sunny day (Mon, 13 Nov 2023 14:51:29 -0800) it happened john larkin
<jl@650pot.com> wrote in <g1a5li971od02t8ecqhq8ljb21cvpdik9u@4ax.com>:

>On Fri, 10 Nov 2023 08:37:45 -0800 (PST), Fred Bloggs
><bloggs.fredbloggs.fred@gmail.com> wrote:
>
>>On Thursday, November 9, 2023 at 6:14:58?PM UTC-5, Klaus Kragelund wrote:
>>> Hi
>>>
>>> I am on the lookout for a cheap 1:1 pulse transformer. Will be using it to drive a MOSFET based Solid State Switch.
>>>
>>> I know Larkin has used the DRQ127
>>>
>>> https://www.digikey.dk/en/products/detail/eaton-electronics-division/DRQ127-1R5-R/667262
>>>
>>> But, I am looking to see if I can find bottom dollar.
>>>
>>> I probably wont go to LCSC, so would prefer a known brand.
>>>
>>> Anyone got a recommendation?
>>
>>If you're looking for cheap, you can't beat capacitor coupling the gate drive. Phillips has a whole chapter in their MOSFET
>>applications handbook on how to do this reliably-wasn't in the market for the technique at the time and skipped it.
>>\
>
>One problem is achieving safe isolation from the 230 VAC power lines.

Build in a cheap Chinese wallwart.

Subject	Author
Re: Cheap pulse 1:1 transformer	john larkin
Re: Cheap pulse 1:1 transformer	Jan Panteltje