CCS/UCC27211: To find out the cause of damage

Hello,

Thank you for the interest in the UCC27211 half bridge driver.

To be able to provide useful feedback, I will need to get more information on the application and operating details.

When the UCC27211 is damaged, is there any other component damage, such as the power MOSFETs?

I assume the 60V is the input to the power MOSFET half bridge input. Although the input is 60V, there may be voltage spikes and ringing in the MOSFET power train higher than the input voltage. Confirm the voltages in the application are within the driver recommended operating range: VDD 8-17V, VHB-VHS 8-17V, HS -1V to 105V, and HB 115V maximum. Without seeing the waveforms I cannot comment if there is a voltage rating concern.

Can you provide a schematic of the driver and support components and the power MOSFET circuits? I would like to review the component values. Also provide the operating condition details of the design, VDD, VIN range, switching frequency.

Please provide scope plots of the following waveforms, in the safe operating condition (60V input). Low side MOSFET VGS, high side MOSFET VGS with differential probe if possible, switch node (HS pin). Record plots with several switching cycles, and also zoom in to see the turn on and turn off details of each MOSFET.

Please confirm if this helps, or you can post additional questions on this thread.

Regards

Richard Herring