We have a good and low weight arc welder made by using uc3846 ic. its not working when ac mains voltage goes down to 220vac. when mains voltage goes 215vac its not starting.
i have replaced the ic but its still same choosing over 220vac voltage. how can we replace this part with new one or how can we disable uvlo inside chip. is there a replacement improved pin compatible part for uc3846
