Hi,
I'm having a problem with an isolated half bridge driver circuit where the gate driver keeps failing.
I'm trying to use two "Si8261BBC-C-IP" isolated gate driver ICs to isolate the MCU from the MOSFETs, but the driver keeps failing after less than 1 minute. As soon as I replace the component with a "FOD3180TV", the circuit works for more than one hour. The MOSFETs however are fine as well as the MCU. It's just the gate drivers that keeps on failing, especially the low side driver.
At this stage I'm only building a test circuit which is running at about 50-kHz and a 40 % duty cycle and a resistor as a "load".
I would really like to have someone just look at my circuit diagram and make a suggestion as to what might be wrong or what I might improve on. The problem is that the gate driver keeps failing and I just simply cannot understand why and what is wrong. The output of the circuit (as measured on an oscilloscope) seems to be a perfect square wave.
Any advice would be greatly appreciated.
Kind Regards
I'm having a problem with an isolated half bridge driver circuit where the gate driver keeps failing.
I'm trying to use two "Si8261BBC-C-IP" isolated gate driver ICs to isolate the MCU from the MOSFETs, but the driver keeps failing after less than 1 minute. As soon as I replace the component with a "FOD3180TV", the circuit works for more than one hour. The MOSFETs however are fine as well as the MCU. It's just the gate drivers that keeps on failing, especially the low side driver.
At this stage I'm only building a test circuit which is running at about 50-kHz and a 40 % duty cycle and a resistor as a "load".
I would really like to have someone just look at my circuit diagram and make a suggestion as to what might be wrong or what I might improve on. The problem is that the gate driver keeps failing and I just simply cannot understand why and what is wrong. The output of the circuit (as measured on an oscilloscope) seems to be a perfect square wave.
Any advice would be greatly appreciated.
Kind Regards