DRV8304: How to calculate the width of gate signal traces?

Hi Nikos,

Please refer to this app note regarding Best Practices for Board Layout specifically section 4.

Also here is a tool by DigiKey: 

https://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-pcb-trace-width

Regards,

Yara

Hi, 

Thank you for your reply. However, we had a discussion about this topic with your colleagues 1-2 years ago, and unfortunately, I cannot find the email. The main consideration was that if the IDRIVENP setting is set to 120mA, then with a high inductance of the gate trace, the equation V=Ldi/dt would result in a high voltage on the trace due to the very small dt. Therefore, I need to be cautious about the inductance of the trace, but I'm unsure if I can find this information on Digi-Key.

king Reards,

Nikos 

Hi Nikos,

I'll have to discuss this with my team, I'll provide an update soon.

Regards,

Yara

Hi Nikos,

As a rule of thumb you can use the following to get an estimate of the inductance of a trace: 20nH / 2.5cm.

This is not a calculation to get the exact inductance of the trace because other factors such as thickness, width, length, and material can influence resistance, capacitance, and inductance so this is just an estimation.

Regards,

Yara

Hi Yara, thank you for your reply but I have posted an other question.

I asked the accepted inductance for the traces by the GHx and GLx pins on the drv8304. 

King Regards,

Nikos