Hi guys!
I have an icepower 1000asp amplifier module. The amplifier module powered by a full bridge push pull converter. The two high side mosfets in the H bridge is much warmer than the low side mosfets even without load.
Does anyone else have this phenomenon? Or is there a problem with my module?
The high side mosfet gates are controlled via a gate drive transformer (I attached the drawing)
The attached oscillogram shows the drain-source voltage of the lower mosfet, which can be used to infer the switching state of the upper mosfet.
It can be seen that without load, the duty cycle of the upper mosfets is roughly 8.8%. The fall time seems a bit long, about 830ns. Is that okay? I think that the problem is caused by switching losses.
I checked the two diodes and the PNP transitor wich charges and discharges the gates and and seems good.
Has anyone else experienced this warming phenomenon?
I have an icepower 1000asp amplifier module. The amplifier module powered by a full bridge push pull converter. The two high side mosfets in the H bridge is much warmer than the low side mosfets even without load.
Does anyone else have this phenomenon? Or is there a problem with my module?
The high side mosfet gates are controlled via a gate drive transformer (I attached the drawing)
The attached oscillogram shows the drain-source voltage of the lower mosfet, which can be used to infer the switching state of the upper mosfet.
It can be seen that without load, the duty cycle of the upper mosfets is roughly 8.8%. The fall time seems a bit long, about 830ns. Is that okay? I think that the problem is caused by switching losses.
I checked the two diodes and the PNP transitor wich charges and discharges the gates and and seems good.
Has anyone else experienced this warming phenomenon?
