Simplistic Mosfet HV Shunt Regs - Page 431 - diyAudio
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Old 11th January 2014, 11:10 AM   #4301
Salas is offline Salas  Greece
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Link the individual B+ and GND points of each unit with solid copper or thick multi strand. At the middle of those links attach the associated cables coming out the shared shunt reg.
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Old 13th January 2014, 09:33 PM   #4302
ferrco is offline ferrco  Hungary
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Hi Salas,

What changes /or possible/ to SSHV2 for 180V / 120mA out?
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Old 13th January 2014, 10:22 PM   #4303
Salas is offline Salas  Greece
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Quote:
Originally Posted by ferrco View Post
Hi Salas,

What changes /or possible/ to SSHV2 for 180V / 120mA out?
Use 56K instead of 68K for the two in series Vref resistors so it starts lower for Vo. As for 120mA consumption I am afraid its not possible with the DN2540s cascode. You will need 140mA CCS for that and the Vgs of the upper DN is not large enough to open the lower one that much. Maybe if you will find an alternative depletion mode MOSFET for the upper one (input connected Q1) with same pin out but higher Vgs spec.
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Old 14th January 2014, 01:25 PM   #4304
AndrewT is offline AndrewT  Scotland
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Would a pair of paralleled CCS do the higher duty job?
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regards Andrew T.
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Old 14th January 2014, 01:42 PM   #4305
ferrco is offline ferrco  Hungary
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Thaks!
Then 120mA is the max value of the DN2540 ccs?
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Old 14th January 2014, 03:30 PM   #4306
Salas is offline Salas  Greece
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Quote:
Originally Posted by AndrewT View Post
Would a pair of paralleled CCS do the higher duty job?
Maybe but not in the certain single CCS board. No space even for a botch. I would prefer browsing some IXYS parts maybe for locating higher Vgs in Q1 alternative.
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Old 14th January 2014, 03:35 PM   #4307
Salas is offline Salas  Greece
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Quote:
Originally Posted by ferrco View Post
Thaks!
Then 120mA is the max value of the DN2540 ccs?
Depending in combo samples Q1 & Q2 the usual max is 90-100mA. You could check them on a breadboard before stuffing them, with low voltage something like 25V across, swap them for one another in a same CCS cascode circuit with the kit's same peripheral parts also. Find the one for Q1 that will yield the more current from the pair.
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Old 29th January 2014, 04:04 PM   #4308
heybobo is offline heybobo  United States
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Hello,

How do I go about purchasing boards or kits? Does the SSHV2 Full Kit have all required parts and board?

I can get to the spread sheet, but I cannot find the paypal payment details...how do I order and pay?

Thanks and Regards,

RC in VT
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Old 2nd March 2014, 08:18 AM   #4309
kokonut is offline kokonut  Germany
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Helo Salas,

if i have ca. 180 Vin (max 200V) and 150V Vout by I load 15mA ( +20mA for the shunt) which changes do you recommend?
Are Epcos B32674 or Wima MKP10 10uF a good choice for C2 (C1)? or have you some recommendations?
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Old 2nd March 2014, 09:18 AM   #4310
Salas is offline Salas  Greece
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Hello, I recommend you use 47k+47k instead of 68k+68k for that voltage range. The capacitor types you mention are good, set at 40mA.
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