TL783 as current source reg with 3 Amps

Jan Sticklus

Other Parts Discussed in Thread: TL783

Hi,

i would like to use the TL 783 in an high voltage application as current sourcing regulator with more than its 0.7Amps output current.

Is the a (easy) way of current boost to 3A with external transistors or maybe paralleling?

Thanks

over 11 years ago

0 Ron Michallick over 11 years ago

TI__Guru**** 153306 points

Jan,

This circuit should work, but it is untested. The TL783 supplies current and the PNP will assist and will provide the bulk of the 3 amps.
The maximum voltage compliance can be over 100V if the PNP transistor can handle the stress (unlikely). The minimum compliance will be a more than 15V because the TL783 has a very high drop out voltage (see figure 1 unit data sheet).

Parallel PNP are possible with emitter degeneration resistors. If NPN are better try current helper seen in figure 19.

0 Jan Sticklus over 11 years ago in reply to Ron Michallick

Prodigy 20 points

Ron,

thank you very much for the answer.

Regards Jan

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TL783 as current source reg with 3 Amps