Simplistic MosFET HV Shunt Regs

[Salas]

So it was a track broken naturally, or by some former incident? Plus a solder bridge. Was it a reworked board?

 

[merlin el mago]

Yes. Now is working with the voltage doubler + R/C/L/C/L/C: solid as a rock

 

[Salas]

You see what HV can do now even with small overlooks. Strikes components like lightning, and people if not careful. Happy end though.

 

[merlin el mago]

Yes HV is very dangerous & have to be managed with a lot of care.

 

[Salas]

Always look twice and think 3 times with HV is the moral of the story.

 

[merlin el mago]

Salas for sure I learned the lesson about HV, I'm looking the ceramic fuses 100mA 500V to order.

 

[merlin el mago]

Salas can't get ceramic slow 100mA 500V at RS or Farnell, do you know where can get them?

 

[Salas]

Fast ones there. Are there any?

 

[merlin el mago]

VDC or VAC?

 

[Salas]

VDC

 

[AndrewT]

I have said it before, but it looks like it is worth repeating.
The CCS part of the regulator can be assembled and tested at low voltage. Prove it alone is working. This will need one extra resistor to increase the grounding current at the selected Low Voltage for testing.

The the extra resistor can be removed and the CCS tested at full voltage using an appropriate load (power) resistor.

Then add on the assembly of the voltage regulator. Test the whole regulator.

 

[merlin el mago]

500VDC still more difficult.

 

[merlin el mago]

I have said it before, but it looks like it is worth repeating.
The CCS part of the regulator can be assembled and tested at low voltage. Prove it alone is working. This will need one extra resistor to increase the grounding current at the selected Low Voltage for testing.

The the extra resistor can be removed and the CCS tested at full voltage using an appropriate load (power) resistor.

Then add on the assembly of the voltage regulator. Test the whole regulator.

Yes, thanks AndrewT, I forgot, I know that by own experience.

 

[merlin el mago]

Salas can I use 125mA fuse?

 

[Salas]

Yes, but fast type.

 

[merlin el mago]

Like this? TDC10 100MA - COOPER BUSSMANN - FUSE, QUICK BLOW, 100MA | Farnell España

 

[Salas]

Yes those have the safe breaking capacity. Glass but long.

 

[merlin el mago]

 

[merlin el mago]

Salas BG caps PSU C/R/C/R/C with SSHV2 = HEAVEN

 

[Salas]

On 6V6 pre or for Itch?