zereshki
Member level 1
hello.
I make a variable switching power supply by half bridge circuit.switches are power bjt 13007.
there is some bump between turning on of switches that occurs while changing duty cycle for voltage change.in some range of duty cycles this bump variate continuously change and cause make "zzzz" sound in trans and make switches warm.there is short term about it in "switching power supply-pressman" book (below picture), but not saied how to solve it.photo shows common cathode voltage of schottky rectifier of output stage.
please help if any body knows about how to solve it.
regards
I make a variable switching power supply by half bridge circuit.switches are power bjt 13007.
there is some bump between turning on of switches that occurs while changing duty cycle for voltage change.in some range of duty cycles this bump variate continuously change and cause make "zzzz" sound in trans and make switches warm.there is short term about it in "switching power supply-pressman" book (below picture), but not saied how to solve it.photo shows common cathode voltage of schottky rectifier of output stage.
please help if any body knows about how to solve it.
regards