Aslesh Kumar
- Jul 30, 2021
- 5
- Joined
- Jul 30, 2021
- Messages
- 5
Hi,
I am working on LM5109 gate driver for a buck converter operation. The gate driver circuit is providing appropriate pulses when connected on no load operation. But, the moment load is connected, high side pulse is missing, but low side is good enough. My bootstrap capacitor voltage is around 2 volts, while it should be 12 volts. My bias capacitor is also 10 times higher than bootstrap. I tried by reducing input resistance, gate driver resistance, it didn't help much. It'd be helpful if anyone can suggest the possible solution.
I am working on LM5109 gate driver for a buck converter operation. The gate driver circuit is providing appropriate pulses when connected on no load operation. But, the moment load is connected, high side pulse is missing, but low side is good enough. My bootstrap capacitor voltage is around 2 volts, while it should be 12 volts. My bias capacitor is also 10 times higher than bootstrap. I tried by reducing input resistance, gate driver resistance, it didn't help much. It'd be helpful if anyone can suggest the possible solution.