UCC28950: Two switch forward converter controller with secondary side synchronous rectification control

Karthik karri

Prodigy 135 points

Part Number: UCC28950
Other Parts Discussed in Thread: UCC28C42-Q1

Tool/software:

Hello Ti Team,

Actually my application is two switch forward converter with secondary side synchronous rectification.

First option:

Do we have any single TI controller which can drive four MOSFETS with synchronous rectification. Also the controller to be automotive qualified-AEC-Q.

Second option:

Also you can Propose the AEC-Q Ti controller-1 which can drive the Primary side two MOSFETS and controller-2 which can drive synchronous two MOSFETS on secondary side (for secondary side synchronous rectification )as shown in the picture below,

Please check and suggesgt the recommended TI controller .

Thanks,

Karthik.

2 months ago

0 Mike O' 2 months ago

TI__Guru 71435 points

Hello,

I am reviewing your inquiry and will get back to you shortly.

Regards,

0 Karthik karri 2 months ago in reply to Mike O'

Prodigy 135 points

Hello Mike,

yes you can check and give me the update

0 Mike O' 2 months ago in reply to Karthik karri

TI__Guru 71435 points

Hello,

TI does not have a single controller for driving a two switch forwarded with SRs.

The UCC28C42-Q1 is a popular device for two switch forward converters. You can use a gate drive transform for the high side FET and another one for the SR FETs. A cheaper option on the SRs would be to make them self driven off the secondary.

The following link will get you to the family of UCC28C4x-Q1 controllers that can be used for this application.

https://www.ti.com/lit/ds/symlink/ucc28c45-q1.pdf

If you have any further questions on how to use the ucc28c4x devices in this application. Please repost in the e2e with ucc28c4x in the title so the appropriate applications engineer can answer your questions.

Regards,

Mike

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UCC28950: Two switch forward converter controller with secondary side synchronous rectification control