UCC21750-Q1: Miler platform

Sveinn Jia

Part Number: UCC21750-Q1

Tool/software:

Hi team,

My customer found a plateau in the VCE during its descending process while conducting a double-pulse test. Is there any way to optimize it?

Regards,

Sveinn

3 months ago

0 Sasikala Thangam 3 months ago

TI__Expert 7640 points

Hi Sveinn,

What is the input capacitance of the module? Looks like it has high capacitance, We need to increase the drive strength to enable faster Vce transition. It can be done by,

Can the customer reduce the gate resistor value? (can remove totally or lower further?)
Looks like the customer has huge 22nF (C212) capacitor on the gate - can they remove it or reduce the value?

Thanks

Sasi

0 Sveinn Jia 3 months ago in reply to Sasikala Thangam

TI__Expert 4610 points

Hi Sasi,

Thanks for your help.

I have another question.

Is the 400mA of STO a constant current source? What is its internal structure?

Regards,

Sveinn

0 Pratik Adibatla 3 months ago in reply to Sveinn Jia

TI__Expert 5883 points

Hi Sveinn,

Due to the holiday in the US on 20th Jan 2024, many of the device experts are currently out of the office.

I can help answer this in the meanwhile. Yes, 400mA is a constant current source.

Thanks,
Pratik

0 Sasikala Thangam 3 months ago in reply to Pratik Adibatla

TI__Expert 7640 points

Thanks Pratik for your quick support.

Hi Sveinn

There is a internal NMOS FET pulls the OUTL to VEE with around 400mA drive strength based on the internal resistance on the gate. It is not a current source.

Thanks

Sasi