kkeeley
Member level 3
Hi,
I'm looking at designing an Active-Clamp Forward SMPS of around 100W max output. It would be used on 230V AC only and would need to output around 5V@10A, 3.3V@10A and also supply 2.7V for the active termination used on the backplane.
I'm thinking of using an NCP1654 fot the PFC stage, a NCP1562 for the main converter, I'm not sure if I should step down directly to a 5V rail then use a post regulator to generate the 3.3V rail and 2.7V rail or step down to a higher voltage rail and then use a post regulator for the 5V rail aswell. I'm thinking of using an NCP1587 as the post regulators.
My first question is what Secondary Side Controller can I use? Can I use two NCP4306's, if so how, as I haven't found an example used on a forward converter.
Question two, which output configuration from th he main converter would be better, a single 5V, a single 12/20V one, or multiple outputs, say 5V and 3.3V?
Thanks for any suggestions and happy to provide more details if required.
I'm looking at designing an Active-Clamp Forward SMPS of around 100W max output. It would be used on 230V AC only and would need to output around 5V@10A, 3.3V@10A and also supply 2.7V for the active termination used on the backplane.
I'm thinking of using an NCP1654 fot the PFC stage, a NCP1562 for the main converter, I'm not sure if I should step down directly to a 5V rail then use a post regulator to generate the 3.3V rail and 2.7V rail or step down to a higher voltage rail and then use a post regulator for the 5V rail aswell. I'm thinking of using an NCP1587 as the post regulators.
My first question is what Secondary Side Controller can I use? Can I use two NCP4306's, if so how, as I haven't found an example used on a forward converter.
Question two, which output configuration from th he main converter would be better, a single 5V, a single 12/20V one, or multiple outputs, say 5V and 3.3V?
Thanks for any suggestions and happy to provide more details if required.