Part Number:DRV8323R
Hello -
I am looking at MOSFET sizing for the DRV8323R. In the datasheet, it gives the following equations and exampe:
Trapezoidal 120° Commutation: IVCP > Qg ׃PWM
Sinusoidal 180° Commutation: IVCP > 3 × Qg ׃PWM
Example: If a system at VVM = 8 V (IVCP = 15 mA) uses a maximum PWM switching frequency of 45 kHz, then the chargepump can support MOSFETs using trapezoidal commutation with a Qg < 167 nC, and MOSFETs with sinusoidal commutation Qg < 56 nC.
When I calculate the example myself, I get twice the values than the datasheet calculation.
Please advise.
Thanks,
-asifjahmed







