Looking for design engineer: 300-400vDC linear regulated power supply, 200ma.

[valvedoctor]

Hello,

I am looking for an experienced engineer to design a simple linear power supply circuit.

Details are:

This power supply is for the B+ of a tube circuit. It should be adjustable between 300 - 400 vDC, up to a maximum of 200ma.

I would need the transformer secondary winding specs, into a bridge rectifier, followed by a MOSFET or darlington pair into a regulation device such as LM3080. Must be diode protected for accidental shorts. Should be low source impedance and noise must be kept to a minimum. Heatsink requirements is also needed. PCB layout will be done by me.

Please PM me to discuss the project and to send me a quote.

Please have references/resume.

Refer to application notes below for similar circuit ideas.

Regards,
Valvedoctor

http://cds.linear.com/docs/en/datasheet/3080fc.pdf
http://cds.linear.com/docs/en/application-note/an2f.pdf
http://www.ti.com/lit/an/snoa648/snoa648.pdf

[T3sl4co1l]

Hmm...

Current limiting?

PFC?

Operating temperature range?  Environmental conditions (indoors / low dust, industrial, outdoors, salt spray..)?

Stability (%/month, ppm/month..)?

Lifetime?  (5khr+?)

Target price, in what production qty/yr?

Target NRE/design cost?  Design schedule?

Tim

[b_force]

Send you en PM, are you still looking for people?