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Download 6114.Output pulses after applying power through FETs
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Here is the schematic of my circuit. With your suggestion, I tested to see if the LM5113 is burned. The figure below showed the waveforms at the output of the gate drive This was measured at the HO and LO pin of the gate drive. As you can see the outputs were good. At this point, I have yet to supply 24V to the FETs Seeing as the pulses were good, I applied 24V to the FETs to see if I get around 15V DC output at the load resistor. The circuit was working for a little bit then the DC output signal was lost. I then disconnected the 24V from the FETs and went back to check the circuit to see what went wrong. I realized that the output pulses of the gate drive changed. The figure below showed the new output pulses when HS was connected to ground This figure showed the output pulses when HS was connected to the FETs Please note that I measured these waveforms without supplying 24V to the FETs. In other word, the drain of Q1 was left open.