audio2design
Major Contributor
- Joined
- Nov 29, 2020
- Messages
- 1,769
- Likes
- 1,832
I don't have any plot yet, to be honest, but it is low to the level it's not disturbing any sensitive device around it.
- no offence but that is completely meaningless. I have had things on the bench 30db above Class A that did not disturb devices nearby ... But that is only because I didn't have the right devices nearby.
I don't have any measures for THD yet, Power factor is 98% @ 110VAC & 99% at 240VAC.
What power level related to full power are these measurements at? These results are unlikely properly measured. PF is rarely better at high voltage.
- most SMPS are not selectable these days but simply work over a wide input voltage range. What range do yours work over?
ZCS
- ZCS is not an architecture. It is a technique within an architecture. What is the power supply topology?
65KHZ & maximum 71KHZ, FYI no synchronous rectifier
- this seems very low frequency. Perhaps for the first stage but for the secondary very low given the power and transformer size.
don't worry too much about creepage distances because I take care of them really well with an additional 3mm airgap between primary and secondary, also were needed at some specific locations at the primary side.
I do worry as shocking customers is bad for business.. You use the same metal heatsink for input and output semiconductors and the pins are very close to the heatsink. That may result in a spacing violation. That makes me worry about other creepage and clearance differences.
- no offence but that is completely meaningless. I have had things on the bench 30db above Class A that did not disturb devices nearby ... But that is only because I didn't have the right devices nearby.
I don't have any measures for THD yet, Power factor is 98% @ 110VAC & 99% at 240VAC.
What power level related to full power are these measurements at? These results are unlikely properly measured. PF is rarely better at high voltage.
- most SMPS are not selectable these days but simply work over a wide input voltage range. What range do yours work over?
ZCS
- ZCS is not an architecture. It is a technique within an architecture. What is the power supply topology?
65KHZ & maximum 71KHZ, FYI no synchronous rectifier
- this seems very low frequency. Perhaps for the first stage but for the secondary very low given the power and transformer size.
don't worry too much about creepage distances because I take care of them really well with an additional 3mm airgap between primary and secondary, also were needed at some specific locations at the primary side.
I do worry as shocking customers is bad for business.. You use the same metal heatsink for input and output semiconductors and the pins are very close to the heatsink. That may result in a spacing violation. That makes me worry about other creepage and clearance differences.