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Tool/software:
Dear Sirs and Madams,
Could you tell us about the switching frequency and dead time of the BQ25730?
In order to select a FET, I need to know how much dead time it has at 800kHz and 400kHz as listed on the datasheet.
The AON6362 FET used in the BQ25730EVM is a very fast FET.
Do you have any guideline values for Qg, Tr/Tf, Delay, etc. required for FETs?
Regards,
MM
Additional Infomation,
We connect ISC009N06LM5 to HIDRV and LODRV.
After checking the data sheet, I can see that the Toff Delay is very slow.
Datasheet ISC009N06LM5 (infineon.com)
Below are the results of measuring the actual waveform.
150pF is mounted in parallel with low side FET(G-S).
Regards,
MM
Hi, MM,
We suggest using the FET with similar characteristics as the EVM FET, like low Qg <60nC, 10-20ns Tr/Tf time.
Our deadtime is in the range of 40-50ns.
Regards,
Tiger
Hello Tiger,
This was very helpful.
We will consider reselecting FET.
Regards,
MM