UCC27524: ringing on the gate side of the IGBT

Howard Zou

Part Number: UCC27524

Hi, my customer is using UCC27524 to drive 2 IGBT. The schematic is as below: Solar-0 is connected to GND through 0 ohm resistor.

The main topology is a non-synchronous boost, BUS+ is the output of the boost converter.

At light load, there is no ringing on the waveform of Vge(gate side to emit side of IGBT's voltage).

But at heavy load, the waveform becomes:

What may be the cause of the ringing and what more information is needed to help identify the root cause?

0 Don Dapkus over 3 years ago

Hi, Howard,

We will reply via email. Can you mark this thread resolved?

0 Howard Zou over 3 years ago in reply to Don Dapkus

Don,

thanks.

I would like to add some information. The input of UCC27524 is BOOST1-PWM, Dri-Boost1 is from C2000 PWM pin.

And we can also observe some ringing on C2000 PWM pin.

So it should not be issue of UCC27524. But still need your help on what may cause the ringing and some advisory on how to solve this problem.

0 Mamadou Diallo over 3 years ago in reply to Howard Zou

Hello Howard,

Thanks for the additional information.

Let's follow up via email now that we have all the relevant information.

Regards,

-Mamadou

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