Optimal topology for high-power small factor SMPS

Asked Jan 15 '23 at 22:53

Active Jan 16 '23 at 14:19

Viewed 57 times

I'm trying to design a relatively small and compact SMPS for an output rating between 200/300 W (400 V in and 20 V out). The AC input from mains is rectified and filtered and fed to a PFC boost stage where the output is around 400VDC. Then the next stage would be a isolated topology to step down the voltage.

What would be the optimal isolated topology to achieve the smallest form factor given the power rating?

edited Jan 16 '23 at 14:19

asked Jan 15 '23 at 22:53

KMN

3

Is the input DC? – user57037 Jan 15 '23 at 23:06
Input would be AC rectified and boosted (+PFC)to 400V – KMN Jan 16 '23 at 00:53
Can you edit the question to include that information? The fact that you need to rectify AC to DC with PFC may have an impact on the topology. – user57037 Jan 16 '23 at 02:40
1

Check out the LLC resonant converter topology. – Jonathan S. Jan 16 '23 at 14:27

Optimal topology for high-power small factor SMPS

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