26-06-2015, 04:07 PM
Hi Mark - thanks for the reply.
Its some years since I did this project - I modelled the design in LTSpiceIV and in practice the physical implementation behaved very closely to the model. I'll dig out the netlist if you want, but ISTR the numbers all lay within the SOA for the various active components.
I'll see if I can find it over the weekend, else I'll probe one of the live units - I do have an EEVBLOG µCurrent Gold units (very nice, aren't they
) - so I could use that...
Main issue is heat - With the Vf across D1-3 and a few amps going through it, it does get a bit warm due to simple P=IV heating...
Its some years since I did this project - I modelled the design in LTSpiceIV and in practice the physical implementation behaved very closely to the model. I'll dig out the netlist if you want, but ISTR the numbers all lay within the SOA for the various active components.
I'll see if I can find it over the weekend, else I'll probe one of the live units - I do have an EEVBLOG µCurrent Gold units (very nice, aren't they
) - so I could use that...Main issue is heat - With the Vf across D1-3 and a few amps going through it, it does get a bit warm due to simple P=IV heating...
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