electrophysics
Member level 3
hi
please refer to the attachment for problem issue. i'm using ir2110 for fullbridge switching supply. the input of ir2110 has a reasonable deadtime (1.2usec) operated at 30KHz each. but when on testing there is no deadtime in between the mid point to ground of both transistors phase legs. on looking with scope the lower ground level mosfets of both sides have a deadtime on their gate. however on upper both mosfets this deadtime is eaten when gate voltage is reached approx equal to test voltage of 20v on falling edge. this is looking to be a bottle neck in first place. how to resolve it? why is it so.
please refer to the attachment for problem issue. i'm using ir2110 for fullbridge switching supply. the input of ir2110 has a reasonable deadtime (1.2usec) operated at 30KHz each. but when on testing there is no deadtime in between the mid point to ground of both transistors phase legs. on looking with scope the lower ground level mosfets of both sides have a deadtime on their gate. however on upper both mosfets this deadtime is eaten when gate voltage is reached approx equal to test voltage of 20v on falling edge. this is looking to be a bottle neck in first place. how to resolve it? why is it so.