Other Parts Discussed in Thread: DRV10983, TIDA-00652
Hello
I have built Reference Buck converter from TIDA-00652, On stand by , when DRV10983 is in standby mode( minimum load to No load ) C1 (4.7uF/450v) and U4 (STQ1NK60ZR-AP) heat up in around 60 sec to 85deg C in open air bench test. As soon as the DRV10983 turn on. both components cool down. Is this temperature increase in low load condition as per design or is something wrong with my board.I have all the components as per the BOM for the design.Shouldn't BiasHV line be used only to start the power supply and power the UCC28180D only on startup and later MAG ( aux winding) should power the I.C.?
I have confirmed all the voltages at VCC, Vsense, and gate of U4 , all are in specification. even Output voltage is 23.95V, so the I.C does turn on and generate gate DRV frequency.
Thanks and Regards
Dinar