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Peak current control of capacitive half-bridges with synchronous rectifier

–1 vote
Hello everybody,

I am developing a capacitive half-bridge with synchronous rectifier(see picture with Plecs), which should always deliver 14.2V and 7A as rated current.
The input voltage range is 36V to 60V and the rated voltage is 48V. The simulaion without regulation works, that is, when I simulate with the nominal values (48V and 2 ohms), the rated current is 7A and the output voltage is also 14.2. I also get these values with the control (peak current control). But if I change the load, the output current is no longer 7 A.

Has anyone an idea what I can do to get always 14.2V and 7A when I change the load

thank you in advance

asked May 6, 2018 by Dirac (21 points)
Please provide a model.

attached is the circuit


1 Answer

0 votes
> Has anyone an idea what I can do to get always 14.2V and 7A when I change the load

Sorry, I'm afraid you cannot achieve that. Hint: Ohm's law. You will only get 14.2V and 7A with a load of 14.2/7 Ohm. And no, "Peak current control" does not mean constant output current but limited peak current.
answered May 11, 2018 by Oliver Schwartz (622 points)