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LT4320 based active rectifier

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D

DaveFred

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Joined 2018
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prasi said:
you can use upto 50-0 VAC per lt4320 bridge MAX.
Click to expand...


My plan was to use 50 VAC, (rectified to ~70VDC), but that is the max VDC rating, 9v to 72v being it's "operating voltage".

I was wondering how safe it would be operating at the edge of the recommend voltage, but I noticed the data sheet shows OutP to be Absolute max rating of 80v.

Would that be to account for using at the limit of 50 VAC and still having a margin of safety?
 
prasi

prasi

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Joined 2014
sites.google.com/site/analogdesign1234/
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sp33ls

sp33ls

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Joined 2018
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PXL_20220422_024532008.MP.jpg

Populated boards. :)

This may be a silly question, but what is "In-GND" and how does that compare to "GND?" Is it signal ground vs chassis ground?

If so, I'm wondering if it's advisable to use attach it, or just leave it disconnected?
 
M

Mission720

Member
Joined 2016
Niels73 said:
Hi.
I am very interested in boards for this rectifier.
Are GB boards still available?
Are the Gerber files available?
I saw that there are boards at PCBWay. However, these seem to be designed for the LT4320 chip in the SMD version - unfortunately that should exceed my soldering skills.
Click to expand...
I'm also very interested and have seen boards on PCB way too, designed/uploaded by someone from Ukraine.

My other query is how to add a 'soft start' such that the bridge ramps up to full voltage over a period of, say, 5 seconds (maybe determined by extenrnal resistor/capacitor) to minimise turn-on stress for downstream components?
 
prasi

prasi

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Joined 2014
sites.google.com/site/analogdesign1234/
Paid Member
Mission720 said:
I'm also very interested and have seen boards on PCB way too, designed/uploaded by someone from Ukraine.

My other query is how to add a 'soft start' such that the bridge ramps up to full voltage over a period of, say, 5 seconds (maybe determined by extenrnal resistor/capacitor) to minimise turn-on stress for downstream components?
Click to expand...
5 seconds is very long. Why not use a CL-60 inline with AC like done for many of the pass labs PSU?
Another option to use a dedicated soft start like Diyaudiostore soft start boards..
 
a007udio

a007udio

Member
Joined 2005
Niels73 said:
I am interested but from Germany.
If that is not a problem because of shipping, I would take at least 6 boards (rectifier THT).
Unfortunately I can't start a conversation in the forum yet, so I have to communicate in the thread at the moment.
Click to expand...
I will order some rectifier THT in the next days. Im from EU so the normal shipping will be around 2 euro to Germany. If you are interested i can send it to you.
 
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Niels73

Member
Joined 2020
Hello a007udio.
Thank you for the offer.
Do you have a limited number of circuit boards?
Otherwise I would take 10.
Do you already have the necessary components or should we order them together? Could possibly have advantages in price. You are welcome to write me a PM, unfortunately I can't start the conservation yet.
Incidentally, I have now also found the Gerber files in the thread. Many thanks to Prasi for that.
 
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