Quantcast
Channel: Motor drivers forum - Recent Threads
Viewing all articles
Browse latest Browse all 14309

DRV8323R: MOSFET sizing question

$
0
0

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


Viewing all articles
Browse latest Browse all 14309

Latest Images

Trending Articles



Latest Images

<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>