Simplistic MosFET HV Shunt Regs

[Salas]

Hey Salas, I am late to the party but can I purchase pcb SSHV2 somewhere? I have used your designs before and am delighted with the results.


Be safe, John.

Hi

Its included in a Group Buy from time to time or pm the organizer in case he currently has any extra

gb-salas-sshv2-regulator

 

[lupoal]

Updates not to search in a long thread

SSHV2
For a safe troubleshooting practical example, click this link to read posts #4478-4497

Hi,
with the new DIY forum version the shortcut to SSHV2 is now broken… it point at something else..
could somebody fix it please?
thank you

 

[Salas]

I think I fixed it, try again

 

[Carlp]

Hmmm. The link to the troubleshooting posts seems to be taking me to the top of this "last" page in this thread, not to the first post in the section. Also, when I got my first email with the new forum, I was taken to the first page of the thread, not the last. I was, not surprisingly, logged out due to the move, but I still expected it to take me to the new posts or to request that I log in. Not sure this is a bug a but I thought I'd report it here because you, Salas, are the man...

 

[Salas]

Now it takes me to the troubleshooting post. But I see the rest of post#1 links shoot to end of thread too and I am looking for the original posts now to try link again.

Better report in the forum problems section. Because I am not admin to fix a bug if its because of the new platform transfer.

 

[Salas]

I restored all post#1 links manually. They now work on my end. Please try them and let me know. Simply go to post#1 and click them.

 

[Carlp]

It all seems to work for me now (links are working as I'd expect). I'll post future comments to the forum problems section. Sorry I didn't think to post there. Today was my first visit to the new forum.

 

[Salas]

It seems to me that the original linking in post#1 here was based on pages count and it got shuffled with the migration. I hope its not a systematic problem.

 

[lupoal]

Ciao Salas,

thank you, now is perfect! now links work... the problem you fixed here I think is a systematic problem as happened to me also in other thread in this forum

 

[Salas]

It could be due to the same reason as here, so better report such problems when you find them. Maybe its fixable with or without the help of each thread's starter.

 

[Adams_Leo]

Hi Salas,does this shunt regs support 30V-150V/150ma? really appreciate it.

 

[Salas]

100mA max unless modifying with stronger depletion mosfets in the ccs cascode

 

[Adams_Leo]

thanks salas,x-mas and happy new year. and chance to update it?

 

[Salas]

Thanks, same wishes 2U2. CCS part can be updated with some stronger slower IXYS DMOS if its all about the current. To update it as a whole I don't have something right now.

 

[Adams_Leo]

Dear salas,do you think IXTA3N50D2 is sutabel here?

 

[Salas]

Yes, seems suitable. It could also possibly play the role of the top cascoding Mosfet offering higher Vgs across a faster bottom one of lower own Vgs allowing it to reach higher mA closer to its IDSS. The DN2540N8-G has minimum 150mA IDSS spec for instance if allowed to.
In any case it takes to experiment with either two of those IXYS in the cascode or a different types combination as mentioned to determine max CCS current and suitable source resistance value for the application's load+spare current goal.

 

[Adams_Leo]

if the output voltage from 30-150V,is there any other parts need to be changed?

 

[Adams_Leo]

I mean for the sshv2
https://www.diyaudio.com/community/...et-hv-shunt-regs.134801/page-104#post-2805889

 

[Salas]

Since you look to shift the adjustment range about three times down from the standard build's spec, shift the R9 R10 reference voltage creating resistors from 68k each to 22k. That's a rough n' ready guideline, you will fine tune the output range in practice.

 

[Adams_Leo]

I have the IXTP08N100D2 in my hand, and change the R9,
R10 to 22K,input voltage is 166V,but the current limit at 104ma and output voltage 105V and can not adjust up.