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Hi there all. I have a question about the LCC trannsformer, How do I need to calculate this, I do know how it does in LLC but did read that the LCC have a capacitor divider and the transformer is a load and not part of resonance. Can I just calculate a half bridge hard switching converter for...

Hi all I see I have post here a lot useless stuff, Oke, I am back because winter is coming. I have still not yet find out how to make the smps, I have simulate a half bridge resonant because for pre stages I need clean voltages. I have decided to use supply where the filament voltages are...

Old thread can be deleted, in the meanwhile I had find the proper solution. thanks all.

Hi there I want to build a smsp for high voltages and filament. Need 2 x 120 volts 250 mA 1 x 350 volts 100 mA 1 x 6.3 volts 5 amp and 1 x 12.6 volts 5 amp or I can make one 18 volts 10 amps and use regulators for filament ofg tubes, the 10 amp is nice for bigger tubes for experimenting. I do...

Is he here? thanks.

I see that nothing has experience with this kind of stuff?

Hi There all. I hope everyone is in good health. I have a problem I can not overcome right, the drive of a multilevel flying cap system who is for Class d testing. I did wnat that to try with Gan, so open loop can be tested. I did try in LTspice with the LMG5113 stacked on four mosfets but...

Thanks, I do also. I did use eagle, but since it is changed with that internet trouble I do not use it anymore, kicad do come close to that as learning curve. regards

Hi what pcb software do you use>? thanks

Hi all. In past I did this one who is feedbacked pre and post and does very low distortion. I have use in sim a chip who has programmable deadtimes, en I did see that the mosfet mention here is even better with it's low nC. This schematic is a three level, less stress on mosfets and give a...

Hi all First I do wish you all a happy new year. I have a question about desiging a resonant smps for audio. because it is need to have low radiation around it a resonant is best. Mine question is I need multiply voltages and do not now how to design the transformer the best way. I need...

Thanks for the note, I didm read that, the chip I have also now. Mine concern was the multiply voltages I need 300 volts output, and 2 x 120 and 1 x 15 volts 10 amps. I have some sheets to calculate also with other chips, it is the resonant frequ and such, what is the same for all. I have now...

Hi All Do somebody now how to calculate the transformer itselfs? I have done this with a excel sheet who is used for a sudden chip I not use But I think it will work also because resonance is resonance right? I have imput that in a simulator and it was quite good and close. I see the resulting...

I have for me to make it more easy but special to learn more made a schematic contains only the resonant parts, transformer and outputs. Then made a sweep, I did discover when put more outputs on the transformer the resonant frequency did not change much, really almost nothing, suprise? or...

Hi All I decided to use a open loop resonance version with lineair voltage regulators for the tube filament voltages, I have seen in simulation that such a resonant smps keep voltages quite stable even without feedback. have not done it so I have the voltages however the resonance change when...

I get error when opening the worksheet. see pic. regards

THanks res_smps, appreciate it I go try, I think it will work oke. For the other stuff I did ask about like feedback runout I have discover the reason, the resonant tank gain is the reason, needs different for type of supply who has low idle load like for amps. Dit change the ratio Lm and Lr...

Not much respons here? I have now try the LCC version of smps, these one feedback did work oke with open output or low load, but suddenly now I do sim again and did change nothing the simulation fail again, it ramps the voltage to max, and the feedback drops to 1 volt cause the frequency of...

I have change the network it is better this way because I do not need a 3th version. However, with load the feedback is oke, but with open output or 1K it does lost its track and voltage get to max. someone now why?. thanks

I need some advice about what to use, mosfets or igbt, there are enough there, to much, but find the proper output semiconductor, I think here are experienced men present who can tell me. I have doe the feedback with esim, it does work oke, esim was quite close to calculated output. regards