I was reading a wiki article on Voltage doublers, and wondered - what are principal diffirences between two following schemes:
They all share same amount of components, but when and why should be one variant chosen over another?
2 Answers
\$\begingroup\$
\$\endgroup\$
3
One difference is that in the first one, the output capacitor needs to be rated for the full output voltage. All of the other capacitors only need to carry half the output voltage.
answered Sep 21, 2018 at 11:18
-
\$\begingroup\$ So it's only about "capacitor rating" requirements? What do you think about circuit currents and coil/diodes operation? \$\endgroup\$– user197437Commented Sep 21, 2018 at 11:57
-
\$\begingroup\$ What do you think about them? Perhaps you should try simulating both circuits. The simple simulator built into this site is perfectly adequate for this. What is the problem you're trying to solve here? \$\endgroup\$ Commented Sep 21, 2018 at 12:01
-
1\$\begingroup\$ Theoretically? Exactly as i stated in the question. Practically?.. To determine few typical applications for each, with small comment on "Why first may fit it better than second (or vice versa)". E.g. i'm looking for smth simple, like "first scheme is used for this this and this because of following properties. Second scheme Is typically found in that and that, for that reasons." \$\endgroup\$– user197437Commented Sep 21, 2018 at 12:12
\$\begingroup\$
\$\endgroup\$
I fully expect lower ripple at twice the frequency with the Delon bridge (second circuit).
This circuit used to be widespread in PC SMPS for use with 115 V as well as 230 V.
The difference between "symmetric Greinacher" and Delon is nonexistent in voltage quadruplers.
