Dear All About Circuit Users,
First of all hello. I hope you're doing well.
I wanted to resort you about a problem that I faced during calculating and testing an inverter circuit that I had created. My problem is about bootstrap network. At start up, when the bootstrap capacitor is filled up, the inrush current exceeds 40A. I chose LM7812 to supply the Vcc pin of the IR2110 driver and this pulsed current rating is quite high despite it happens in a very short time interval. And I'm getting not just only this spike, but also another high current spikes comes shortly after it is observed. I tried to put a series resistor in front of the capacitor but I didn't sort it out since my circuit's timing requirements didn't meet it.
If you wouldn't mind, I would like to hear your opinions and suggestions about possible solutions and suggestions. I also added photo of the circuit that I drew, sketch of it on Multisim and 12V voltage regulator's output current graph.
I'm looking forward to get feedback from you.
Thank you,
Hamdi Levent BOZOĞLU
Mod: Created your own thread.
First of all hello. I hope you're doing well.
I wanted to resort you about a problem that I faced during calculating and testing an inverter circuit that I had created. My problem is about bootstrap network. At start up, when the bootstrap capacitor is filled up, the inrush current exceeds 40A. I chose LM7812 to supply the Vcc pin of the IR2110 driver and this pulsed current rating is quite high despite it happens in a very short time interval. And I'm getting not just only this spike, but also another high current spikes comes shortly after it is observed. I tried to put a series resistor in front of the capacitor but I didn't sort it out since my circuit's timing requirements didn't meet it.
If you wouldn't mind, I would like to hear your opinions and suggestions about possible solutions and suggestions. I also added photo of the circuit that I drew, sketch of it on Multisim and 12V voltage regulator's output current graph.
I'm looking forward to get feedback from you.
Thank you,
Hamdi Levent BOZOĞLU
Mod: Created your own thread.
Attachments
Last edited by a moderator:
