Hi,
I've been all over the internet and cannot find an answer to my question. In my design I have 5 transformers, each convert U.S. wall power (120 Vrms) to 12.6 Vrms. I want to connect the wall power (120 Vrms) to the transformers through PCB traces. I will be using a 4 layer board made from FR4. I know FR4 (in general) has a breakdown voltage of 750 V/mil. I was thinking of running the the two AC power lines on layers 2 and 3 and putting a copper pour on layers 1 and 4 which will connect to Earth ground.
What I know: 115 Vrms = 340 Vpp = 170 Vmax. Since the breakdown is 750 V/mil I should be OK in placing these on layers 2 and 3 with Earth on layers 1 and 4. I've made the PCB traces wide enough to handle 10x the total current that will be used.
Please let me know if there is anything I am missing or got wrong. I don't want my board to blow up. Prefer people with experience with this problem or design.
Thank you.
I've been all over the internet and cannot find an answer to my question. In my design I have 5 transformers, each convert U.S. wall power (120 Vrms) to 12.6 Vrms. I want to connect the wall power (120 Vrms) to the transformers through PCB traces. I will be using a 4 layer board made from FR4. I know FR4 (in general) has a breakdown voltage of 750 V/mil. I was thinking of running the the two AC power lines on layers 2 and 3 and putting a copper pour on layers 1 and 4 which will connect to Earth ground.
What I know: 115 Vrms = 340 Vpp = 170 Vmax. Since the breakdown is 750 V/mil I should be OK in placing these on layers 2 and 3 with Earth on layers 1 and 4. I've made the PCB traces wide enough to handle 10x the total current that will be used.
Please let me know if there is anything I am missing or got wrong. I don't want my board to blow up. Prefer people with experience with this problem or design.
Thank you.