Go Back   Home > Forums > >

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
Old 4th December 2020, 09:17 AM   #1
zergxia is offline zergxia  China
diyAudio Member
 
Join Date: Sep 2020
Location: SiChuan
Smile What is the simplest and most efficient way to reduce ±60V to ±15V?

Dear friends, I need some help. What is the easiest way to reduce ±60V to ±15V with sufficient performance?

I initially plan to use LM317 tracking preregulator circuit and add TVS diodes for clamping protection. Doing so can meet the requirements while getting the powerful performance of LM317 and is relatively simple, but there are some problems that have not been resolved:

1. At the moment of starting, due to the need to charge the load capacitor, the load will be exposed to a dangerous environment far exceeding ±15V.and the LM317 is easily damaged. If I use 30V TVS diodes on each LM317 and connect 17V TVS diodes in parallel to the output port, can I effectively protect the load from overvoltage damage?

2. At present I know that LM317 can make a tracking preregulator circuit to achieve a voltage drop of 50-60V. So, can LM337 corresponding to LM317 make negative voltage tracking preregulator circuit?

3. I considered using LM783, but it does not have a negative voltage LDO.Are there other more concise high-performance positive and negative voltage regulator circuits?

thank you all!:D
Attached Images
File Type: jpg 20201204165447318.jpg (47.1 KB, 335 views)

Last edited by zergxia; 4th December 2020 at 09:22 AM.
  Reply With Quote
Old 4th December 2020, 09:20 AM   #2
kokoriantz is offline kokoriantz  Lebanon
diyAudio Member
 
Join Date: Dec 2015
Location: south east asia
First bring down by switching converter to +/- 20v, than apply linear regulator.
  Reply With Quote
Old 4th December 2020, 09:24 AM   #3
picowallspeaker is offline picowallspeaker  Italy
diyAudio Member
 
picowallspeaker's Avatar
 
Join Date: Apr 2007
Good old R+Zener diode
About 1k5 Ω and 15 V Zener
__________________
there’s no staying at home when you do not have one
  Reply With Quote
Old 4th December 2020, 09:35 AM   #4
zergxia is offline zergxia  China
diyAudio Member
 
Join Date: Sep 2020
Location: SiChuan
Quote:
Originally Posted by kokoriantz View Post
First bring down by switching converter to +/- 20v, than apply linear regulator.
Positive and negative voltage; 400mA current; low-noise switching converter.
Is there a specific model recommendation?
Is the high frequency noise as low as that of a linear regulator?
Thank you !
  Reply With Quote
Old 4th December 2020, 09:59 AM   #5
bansuri is offline bansuri  Italy
diyAudio Member
 
Join Date: Aug 2008
Location: Dolceacqua
You need a preregulator to lower the regulator input voltage, it is above the specs.
How much current is required at 15V?
prereg.png
This is good to 200mA, it gives 23V out
  Reply With Quote
Old 4th December 2020, 10:44 AM   #6
jan.didden is offline jan.didden  Europe
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Westende Resort, BE coast
It all depends on the current levels those supplies have to deliver.
Without knowing that you can't give an intelligent answer.

Jan
  Reply With Quote
Old 4th December 2020, 11:54 AM   #7
00940 is offline 00940  Belgium
diyAudio Member
 
00940's Avatar
 
Join Date: Sep 2003
Location: Liège
Quote:
Originally Posted by zergxia View Post
Positive and negative voltage; 400mA current; low-noise switching converter.
45*0.4= 18W per rail of wasted energy if you go for a linear solution, so yes a switching solution is the way to go.

The easy but not cheap way is to use two isolated dc-dc converter such as the SPB09C-15 from Meanwell. 36 to 75v input, 15v@600ma output. But about 15$ each... Follow that by a CLC filter.
__________________
All that is excessive is insignificant. Talleyrand
  Reply With Quote
Old 4th December 2020, 12:02 PM   #8
vacuphile is offline vacuphile  Netherlands
diyAudio Member
 
vacuphile's Avatar
 
Join Date: Apr 2011
Location: Seaside
DC DC 10A Verstelbare 60V 48V 36V 24V 6.5V naar 30V 24V 12V 3V Autolader Regulator Step Down Buck Converter Power Supply Module|Omvormers & Converters| - AliExpress

and many more options if you look
__________________
We sinners never give up (Sally Stanford).
  Reply With Quote
Old 4th December 2020, 12:11 PM   #9
JMFahey is offline JMFahey  Argentina
diyAudio Member
 
JMFahey's Avatar
 
Join Date: Mar 2009
Location: Buenos Aires - Argentina
Quote:
Originally Posted by zergxia View Post
Dear friends, I need some help. What is the easiest way to reduce ±60V to ±15V with sufficient performance?
WHAT-IS-THE-LOAD-CURRENT?
Quote:
I initially plan to use LM317 tracking preregulator circuit and add TVS diodes for clamping protection.
Are you asking for a solution or confirmation on your already decided plan?
We lack important data.
And not sure about your "clamping" either.
Quote:
Doing so can meet the requirements while getting the powerful performance of LM317 and is relatively simple, but there are some problems that have not been resolved:
????????

Quote:
1. At the moment of starting, due to the need to charge the load capacitor, the load will be exposed to a dangerous environment far exceeding ±15V.
No.
If anything, load will be *under* volted until any capacitor across it charges.

Quote:
and the LM317 is easily damaged. If I use 30V TVS diodes on each LM317 and connect 17V TVS diodes in parallel to the output port,
Quote:

can I effectively protect the load from overvoltage damage?
Which overvoltage?
Quote:
2. At present I know that LM317 can make a tracking preregulator circuit to achieve a voltage drop of 50-60V. So, can LM337 corresponding to LM317 make negative voltage tracking preregulator circuit?

3. I considered using LM783, but it does not have a negative voltage LDO.Are there other more concise high-performance positive and negative voltage regulator circuits?
You are running too fast for us to catch up , please supply full details on your load requirements first.

And welcome to the Forum
__________________
Design/make/service musical stuff in Buenos Aires, Argentina, since 1969.
  Reply With Quote
Old 4th December 2020, 12:37 PM   #10
gmphadte is offline gmphadte  India
diyAudio Member
 
Join Date: Jul 2003
Location: Dona paula, Goa
Where do you get your 60 volts from...is it a transformer.
Why not use another transformer.

gajanan phadte
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
The optimal way of getting +15V, -15V & 48V from single power supply BamboszeK Power Supplies 8 24th June 2020 06:57 PM
What is Simplest and Best 6550 PP What is Simplest and Best 6L6 PP circuit? (PK) hersp13 Tubes / Valves 5 19th October 2013 05:08 AM
FS: 2 Avel Lindberg Y236905 60V+60V toroid kctess5 Swap Meet 11 22nd February 2013 06:29 PM
Plitron 120va 60V / 225va 60V Pocoyo Group Buys 2 3rd September 2007 06:25 AM
How to get +15v and -15v from 12vdc mbcouple Everything Else 15 25th June 2005 06:25 PM


New To Site? Need Help?

All times are GMT. The time now is 02:19 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki