P Padox New Member Sep 14, 2022 #1 Is it normal for a uc3843 ic in smps circuit to heat up gradually while in operation?
ronsimpson Well-Known Member Most Helpful Member Sep 15, 2022 #2 No. Is the supply working? No but there are many hot parts nearby. Upvote 0 Downvote
Tony Stewart Well-Known Member Most Helpful Member Sep 16, 2022 #3 That depends on % losses, PCB heatsink and free air flow. Otherwise Upvote 0 Downvote
ronsimpson Well-Known Member Most Helpful Member Sep 16, 2022 #4 If the MOSFET had a Gate to Source short the UC3843 will run hot. Under normal conditions it will not generate much heat. Upvote 0 Downvote
If the MOSFET had a Gate to Source short the UC3843 will run hot. Under normal conditions it will not generate much heat.