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Forum Post: LM5104 issues

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Hi.

I am using the LM5104 to drive an half bridge with an inductive load, whose schematic is attached.

The main problem is a strong swinging on the load voltage. I have experienced the same problem

by changing the layout of the PCB many times, by using different resistors connected to the RT pin,

and different sizes of the bootstrap capacitor. I also tried to use an external "optional" recovery

bootstrap diode, and this increases the swinging really a lot. Moreover, the swinging has a fixed

frequency of 14 MHz which I can not really explain.

Any suggestions on how to improve the circuit behaviour, as at the moment it is not useful at all ?


Thanks


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