UCC28950: UCC28950PWR CS pin

Poh Kok Keng

Genius 5112 points

Part Number: UCC28950

Dear Support,

We are currently using UCC28950PWR, the CS (pin15) is taking the sampling from the secondary transformer bus current.

Can I check if we can directly use the primary current of the transformer for peak current control?

Best regards,
Felix

over 2 years ago

0 Mike O' over 2 years ago

TI__Guru 66135 points

Hello,

The current sense transformer (CT) should not be put in series with the PSFB transformer. This is because the DC current information gets lost.

Please refer to the following application note on how to design with the UCC28950 in a FSFB; as well as, CT placement. https://www.ti.com/lit/pdf/slua560

Regards,

Power management

Power management forum

UCC28950: UCC28950PWR CS pin