UCC28C56EVM-066: UCC28C56EVM-066

Bruno Pedonese

Prodigy 30 points

Part Number: UCC28C56EVM-066
Other Parts Discussed in Thread: UCC28C58

Hi,

How should the UCC28C56EVM-066 EVB scheme be modified to be able to use a SIC mosfet with kelvin source?

Thank you.

8 months ago

0 Hong Huang 8 months ago

TI__Guru 52095 points

Hi,

Can you provide more details how kelvin source present and where it is?

0 Bruno Pedonese 8 months ago in reply to Hong Huang

Prodigy 30 points

Hi,

in the UCC28C56EVM-066 EVB I would like to replace the power MOSFET SCT1000N170AG with a SIC MOS (G3R160MT17J). The new MOSFET have the Kelvin Source pin, where and how should I connect it?

Another question: for use G3R160MT17J (G3R Technology with +15 V Gate) I must replace UCC28C56HQDRQ1, present on EVB, with UCC28C58QDRQ1?

Thank you.

0 Hong Huang 8 months ago in reply to Bruno Pedonese

TI__Guru 52095 points

Hi,

I cannot find the datasheet for your mentioned MOSFET. Please provide its datasheet to me for review.

0 Bruno Pedonese 8 months ago in reply to Hong Huang

Prodigy 30 points

https://www.mouser.it/datasheet/2/169/G3R160MT17J-2449134.pdf

0 Hong Huang 8 months ago in reply to Bruno Pedonese

TI__Guru 52095 points

Hi,

The connection needs to be like the below.

For this MOSFET, yes, UCC28C58 should be used, and the VDD needs to change to 15V from current 18V. So the aux related circuit needs to redesign.

0 Bruno Pedonese 8 months ago in reply to Hong Huang

Prodigy 30 points

thanks for the support.
Can I continue to use the transformer on the EVB and only modify the other components?

0 Hong Huang 8 months ago in reply to Bruno Pedonese

TI__Guru 52095 points

Hi,

If using the same transformer, Vout would need to adjust proportionally since AUX is cross regulated with Vout to get 15V instead of 18V, assuming you have same similar voltage range.

If that is not possible, you would need to add an LDO between AUX and VDD then you can set up Vout relatively independently.

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UCC28C56EVM-066: UCC28C56EVM-066