UCC21530: UCC21530 or similar isolated gate driver for a 120V PMSM motor design ( URGENT)

Eduardo

Part Number: UCC21530
Other Parts Discussed in Thread: UCC21551-Q1, UCC21330, UCC21551

Tool/software:

Hello,

We are looking for a robust and reliable isolated and/or non-isolated half bridge gate driver for a 120V 6kW PMSM motor driver ;
1- We are wondering what options TI offers for both isolated and non-isolated gate drivers?

2- If a galvanic isolation is NOT required for this design, does TI still still recommend to use an isolated design for this high voltage motor to lower noise?

3- Our preference is to use a gate driver that supports both Si and SiC devices.

Appreciate your URGENT support on this.

Thanks

over 1 year ago

0 Pratik Adibatla over 1 year ago

TI__Expert 7463 points

Hi,

Due to the holiday in the US on 27 May 2024, many of the device experts are currently out of the office. When they return, they will look into this and provide a response. Please expect some delay accordingly.

Thanks,
Pratik

0 Hiroki Honda over 1 year ago

TI__Expert 8686 points

Hi Eduardo,

For the latest isolated gate driver that is able to support both Si and SiC devices, I would recommend UCC21551-Q1 which has the latest improvements based on customer feedback.

Product page for UCC21551-Q1: https://www.ti.com/product/UCC21551-Q1

For a more cost effective and smaller package, I would recommend UCC21330. This device is a very similar to UCC21551-Q1 but on a narrow package. This device does have smaller isolation ratings but with that voltage and power level, it may the best fit for your application.

Product page for UCC21330: https://www.ti.com/product/UCC21330

Hope this helps!

Regards,
Hiroki

0 Eduardo over 1 year ago in reply to Hiroki Honda

Prodigy 40 points

Thanks a lot Hiroki! 120V is not a very high voltage ; that being said, do you guys still recommend an i isolated solution ? If so, can you explain why ?

0 Hiroki Honda over 1 year ago in reply to Eduardo

TI__Expert 8686 points

Glad to help!

The benefit of having an isolated gate driver is the higher robustness to dV/dt and having the control signals completely isolated from the power stage which is beneficial for safety reasons.

With this robustness, increased efficiency can be achieved from being able to achieve faster switching.

However, a non-isolated gate driver would be cost effective solution if these variables (noise and safety) are not as important in the application.

Please feel free to ask below if you have additional questions.

Regards,
Hiroki

0 Eduardo over 1 year ago in reply to Hiroki Honda

Prodigy 40 points

There is a huge problem with the UCC21551 where the chip is not offering any protections like over current, overvoltage, etc. Is that correct? If so, that is a big drawback for this chip! Does TI offer any other isolated drivers which are more reliable and robust and won't need external protection circuits ?