Hey Guys,
I have been working on my first PCB which is used to drive BLDC motors. Basically it is a 3 phase inverter. I am using the IR2103 as the mosfet drivers. The mosfets are F3205s. After fabrication, for some reason I am experiencing some level of shoot-through in half bridges. When no load is connected, the mosfets just get hot. They do still provide current through the phase outputs, but im guessing at low efficiency. I've been try to analyze if im using the components wrong but am not able to find a solution. Is there something obvious I am not doing as per my schematic below? Any leads would be greatly appreciated!
1,2,3 are pwm input for each phase. A,B,C are the current outputs for the motor phases. I have not used copper pour on any layers. Is that an issue?
Thank you,
Khan
I have been working on my first PCB which is used to drive BLDC motors. Basically it is a 3 phase inverter. I am using the IR2103 as the mosfet drivers. The mosfets are F3205s. After fabrication, for some reason I am experiencing some level of shoot-through in half bridges. When no load is connected, the mosfets just get hot. They do still provide current through the phase outputs, but im guessing at low efficiency. I've been try to analyze if im using the components wrong but am not able to find a solution. Is there something obvious I am not doing as per my schematic below? Any leads would be greatly appreciated!
1,2,3 are pwm input for each phase. A,B,C are the current outputs for the motor phases. I have not used copper pour on any layers. Is that an issue?
Thank you,
Khan
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