fifahaywire
New Member
Hi, i'm new here and currently carrying on a project on buck converter. and i'm having trouble. i use IGBT ( https://www.alliedelec.com/search/productdetail.aspx?SKU=70017065 ) as the switch but there seems to be a problem with the signal. my driving circuit is as attached below. i'm using TL494 and HCPL 3140. i got the output from the PWM controller as i want it to be but when i connect it to the optocoupler, i got a straight DC. what am i doing wrong? please help.
Thanks
Thanks