Hi,
I was looking for the schematic of an Antec Phantom 500watt or a comparable scheme
The PSU was builded around a L4981AD as a PCF
On the bulk cap must i found a voltage of 400V
The voltage is now 318V (thus no powerfactor)
Ac input is here local 230VAC
Vcc became from a transistor and voltageregulator 7812 voltage is 11.8V
Vcc measure is 10.3V
Vcc input current was about 8mA
The transistor base cames from a optocoupler
On the primairy side the voltage is -7.2V
Secondary side about 11.5V
I have replaced all the bad caps and replaced by low esr parts
Further has it a UCC28950 and a IC witch is difficould readable with the letters
J6619 Control 001
This is a Phase-Shifted, Full-Bridge Controller With Synchronous Rectification.
Placed on a separate PCB
From this board the optocoupler is driven
Can anyone help me
Regards
Harrie
I was looking for the schematic of an Antec Phantom 500watt or a comparable scheme
The PSU was builded around a L4981AD as a PCF
On the bulk cap must i found a voltage of 400V
The voltage is now 318V (thus no powerfactor)
Ac input is here local 230VAC
Vcc became from a transistor and voltageregulator 7812 voltage is 11.8V
Vcc measure is 10.3V
Vcc input current was about 8mA
The transistor base cames from a optocoupler
On the primairy side the voltage is -7.2V
Secondary side about 11.5V
I have replaced all the bad caps and replaced by low esr parts
Further has it a UCC28950 and a IC witch is difficould readable with the letters
J6619 Control 001
This is a Phase-Shifted, Full-Bridge Controller With Synchronous Rectification.
Placed on a separate PCB
From this board the optocoupler is driven
Can anyone help me
Regards
Harrie
