Re: Adapting this NSC app note for my +150V regulator

electronic_dave@xxxxxxxxxxx wrote:
Hi all. I have the need for a linear regulator to supply +150V at 0 to
50mA from a 260VDC unregulated input. There's this National app note,
"High Voltage Adjustable Power Supplies", with which you may be
familiar:

http://www.national.com/ms/LB/LB-47.pdf

It seems that using something like, say, TIP50 for Q1 and Q2, and
reducing R3 should do the trick. Is there anything I have overlooked,
though? Regulated power supply design is not my area of expertise.

Thanks in advance,

--Dave in New York

PS: TIP50 data*** "for those wot wanna see it":
http://www.fairchildsemi.com/ds/TI/TIP50.pdf


At the high output voltage you want this is usually done via Opamp and discretes, using FETs. See Art of Electronics Chapter 6.2. In my copy it's on page 369, figure 6.47.

--
Regards, Joerg

http://www.analogconsultants.com/
.

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