UCC27714: It damage easily when it used in the induction cooker

Hello Aggil,
Thank you for the interest and support of the UCC27714 half bridge driver. I copied and reviewed the files and have some comments below. After downloading the files I did remove from the thread to limit the viewing audience.

These are the PCB layout comments on induction cooker. The traces for HI and LI, pins 1 and 2 are very long for both IC6 and IC7. There is potential for induced noise and ground bounce since the control signals originate and the control ground exists quite some distance from the drivers. Excessive noise or ringing has the potential to turn on the driver output unexpectedly. We recommend a small RC filter on LI and HI located very close to the driver IC. See the UCC27714 datasheet section 9.2.2.1 for advice. The UCC27714 operation allows LO and HO to be high at the same time which can result in cross conduction of the IGBTs. This is different than the 2ED23106 which has the output interlock function. TI has a 620V high-side low-side driver with the output interlock function and deadtime function which is the UCC27712.

The connections for pin 4, EN or enable, are also very long and have no R/C filter at the driver input pin. This signal is also sensitive to excessive ringing or noise which may cause unexpected operation off the driver outputs.

On IC 7 the connection from VDD, pin 7 to the bypass capacitor has a thin long trace. Recommend wider trace, lower inductance connection.
On IC7 the HO and HS pins are very long and thin traces, this will result in significant trace inductance which can result in ringing during the turn on and turn off transitions of the power device. This may result in significant ringing at the driver HO to HS pins. Since the UCC27714 is a higher rated peak current driver, 4A Vs 2.3A, try increasing the gate resistance from 10 Ohms to 15 Ohms which will help dampen the ringing. Also you can try to add a small 1A schottky diode from HO to HS with HS connected to the anode and HO connected to the cathode. This will limit the negative voltage ring at the driver IC pins.
It appears that the low side IGBT source ground path and return to the driver ICs COM pin is very long. I assume there may be a current transformer. This will result in a large gate drive current loop inductance which can result in large ringing as mentioned above on the HO and HS pins. I would also recommended trying the gate resistance of ~15 Ohms compared to the original 10 Ohms since the UCC27714 drive strength is higher. Also try the schottky diode from LO to COM to clamp the negative voltage ringing.

I hope this helps with your concerns.

Regards
Richard Herring

Hello Aggil,
The UCC27712 has similar drive current capability as the 2ED23106, with 1.8A source and 2.8A sink current capability. Since reviewing the files does raise some questions on possible driver input noise, and the 2ED23106 has interlock I recommend considering the UCC27712 for this application. The total gate charge of the IRGP4069D is reasonable at 69nC, the UCC27712 has been used with devices beyond this gate charge.

Regards,
Richard Herring

Hallo Aggil,

Can you confirm if the information I provided solved your questions and concerns, by selecting the green button on the thread? That will help us a lot.

Regards

Richard Herring