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I think that it is there so that a signal from the transformer can be connected to the TPS3513 to make sure that the power good signal stops as soon as possible when the mains fails, before regulated voltage starts to reduce.Power-good input. A low level indicates that power is not good, while a high (>1.2V) indicates that power is good.
I asume that you've read https://focus.ti.com/lit/ds/symlink/tps3513.pdf
That says:-
I think that it is there so that a signal from the transformer can be connected to the TPS3513 to make sure that the power good signal stops as soon as possible when the mains fails, before regulated voltage starts to reduce.
You should connect it to a potential divider that gives just over 1.2 V when the PSU is at full voltage.My project is building an atx power supply. The input of my circuit is from an external PSU, therefore i do not have a transformer.. So, can u tell me where do i connect to? Thanks
You should connect it to a potential divider that gives just over 1.2 V when the PSU is at full voltage.
If you don't want the input, wire it to 5 V.
So u mean is, if i dont want it to connect to the input or a voltage divider of >1.2V, i can just connect to 5v?