Hello guys
I have a 1600w netpower power supply which I'm trying to fix it.
The power supply has pfc part ,bridge converter and a 6 watt cooling fan which is placed and supplied from 12v out put voltage.
When the power is turned on without any output load ,even it's cooling fan all things are OK, including pfc and output voltage.
But turning the power with its low power output fan shows a strange thing.
The power supply starts to sink high rate of energy from the network without delivering it to the bridge.
The pfc voltage drop to 375v and the pfc mosfet gate signals become so wide contrary of the very narrow gate pulses of both sides of bridge.
So I included that the energy is sent back to the network through the pfc mosfet.
Anyone could explain me what fault is there?
I have a 1600w netpower power supply which I'm trying to fix it.
The power supply has pfc part ,bridge converter and a 6 watt cooling fan which is placed and supplied from 12v out put voltage.
When the power is turned on without any output load ,even it's cooling fan all things are OK, including pfc and output voltage.
But turning the power with its low power output fan shows a strange thing.
The power supply starts to sink high rate of energy from the network without delivering it to the bridge.
The pfc voltage drop to 375v and the pfc mosfet gate signals become so wide contrary of the very narrow gate pulses of both sides of bridge.
So I included that the energy is sent back to the network through the pfc mosfet.
Anyone could explain me what fault is there?
