Power supply for small tube amp
Posted by: Tomasz Gumny
on
I'm going to built isolated mains power supply for small tube audio amp.
Input: 230(195..265)VAC
Outputs:
1. heater: 6.3V / 2.2A
2. anode: 270V / 150mA
3. control: 12V / 0.6A
May you help me choose device and design transformer?
PI Expert doesn't support output voltages above 100V. :(
Thanks in advance.
Tom
回應
Thanks for your answer!
I would give PI Expert last chance. ;)
I've used TOP245YN and defined "anode" output as separate 3 x 90V outputs. Now I get warning:
"Drain voltage close to BVDSS at maximum OV threshold. Verify BVDSS during line surge, decrease VUVON_MAX or reduce VOR."
Suggested VOR for multi-output transformer is 135V. How can I change VUVON_MAX?
You can use PIXls software to design your power supply. I would suggest starting with a TOP256YN device. If you are going to cross regulate the HV supply, that the load variations on any output will vary the HV output significantly.
Z. Cochrane