The simplistic Salas low voltage shunt regulator - Page 433 - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 1st October 2011, 03:58 PM   #4321
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
Saturday Homework:

I want to have at least 220mA in the CCS so I am using 3r3 // 10r instead of 4r7 for R1.

R4 = 82r (I do not have such value so I will try 100r)

The 470u BG std on the input is good for decoupling.

R7 (0.22r) will be done with 4 x 1r (R7 a-d)

The output zobel cap (1u) is placed on the edge of the board so I can easily replace it (I want to try 220nF FT-3)

For C2 I will try 680u BGN that I have left over.

I would apreciate your oppinions on the layout and particularly on the Mosfet connections because I am not sure I got M2 Drain and Source well connected... Does M2 Drain go to F+ ?
Attached Images
File Type: jpg REFLEKTOR LAYOUT.jpg (174.6 KB, 408 views)
__________________
RC
  Reply With Quote
Old 1st October 2011, 04:28 PM   #4322
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Ricardo how many 0R22 do you need?
  Reply With Quote
Old 1st October 2011, 04:46 PM   #4323
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
Two... at least
__________________
RC
  Reply With Quote
Old 1st October 2011, 04:55 PM   #4324
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Q1,Q2 reverse so they look to each one's face so you can bond them for same temperature. See they have the best hfe & Vbe matching also.
  Reply With Quote
Old 1st October 2011, 05:09 PM   #4325
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Ricardo shot me an email with your full name & address I will send you a couple of Vishay vitreous enameled 0R22 3W
Attached Images
File Type: jpg DSC00051.jpg (436.0 KB, 392 views)
  Reply With Quote
Old 1st October 2011, 05:14 PM   #4326
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
Thank you Merlin
You have e-mail.
I have a box full of 220nF FT-3... do you want some to experiment ?
__________________
RC

Last edited by RCruz; 1st October 2011 at 05:16 PM.
  Reply With Quote
Old 1st October 2011, 05:20 PM   #4327
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
Quote:
Originally Posted by Salas View Post
Q1,Q2 reverse so they look to each one's face so you can bond them for same temperature. See they have the best hfe & Vbe matching also.
I will do that , thanks. What type of glue should I use ? Or can I use thermal compound and fix them with termal sleeve ?

Can I use metal film 220r for gate stoppers or should I go for CF ?

Is R3 2.2r determinant or can I use 1r8 ?
__________________
RC

Last edited by RCruz; 1st October 2011 at 05:24 PM.
  Reply With Quote
Old 1st October 2011, 05:26 PM   #4328
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Gate stoppers MF OK, worked with other regs with comparable gain and frequency too. Have some space in case a base stopper for Q5 is going to be needed in the end, there is some layout distance that may demand it. No glue! Thermal grease and thin tie wrap or heat shrink sleeve.

1.8R looks safe (theoretically). If it proves very stable, we can look if it will be stable with only 220nF teflon zobel cap also. But don't start with too many changes, in case it will not go well, to know where to experiment step by step.
  Reply With Quote
Old 1st October 2011, 05:47 PM   #4329
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
Perfect... please have a look at the new layout (I will leave space for Q5 base stopper)

The changes I am asking for are only related with my stock of parts.

I can not buy anything now and must use whatever I have got
__________________
RC
  Reply With Quote
Old 1st October 2011, 07:23 PM   #4330
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Quote:
Originally Posted by RCruz View Post
Thank you Merlin
You have e-mail.
I have a box full of 220nF FT-3... do you want some to experiment ?
Ricardo you have email, thanks for the couple of caps.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 01:08 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2