Investigating the role of MOSFET in DC motor driver circuit

Thread Starter

Ahmad fahimi

Joined Apr 21, 2023
2
Hello friends . As you can see in the photo, it is a DC motor driver circuit designed as a half bridge. My question is about the role of the upper MOSFETs that are paralleled with the motor. In fact, what is the function of the upper MOSFETs. Thank
 

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Thread Starter

Ahmad fahimi

Joined Apr 21, 2023
2
Thanks bro . What you mean is that when the lower MOSFETs turn off, the upper MOSFETs turn on and cause the coil to discharge, which causes the motor to brake. Is this true?
 

MaxHeadRoom

Joined Jul 18, 2013
28,696
Seems something weird about the configuration of the LO side drivers?
They have to normally sink to common for the bootstrap to work?
Where did you get the circuit, and what are you trying to achieve?
 
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