Active Clamp Forward Intro - JAT Collaboration Audio Amp Power Supply Design

[@markturner7229]

Thank you for taking the time to teach us

[@KissAnalog]

You bet! Thanks Mark!

[@paulcottingham241]

Straight forward forward converter😁 Looking forward to the next installment!

[@KissAnalog]

Thanks so much Paul! I'll get back on this and finish it up so that it doesn't drag on;)

[@northox]

Very informative. I appreciate when you can share your experience behind each design decisions, e.g. Why/when something is good or not.

[@KissAnalog]

Thanks Danny! I appreciate you!

[@MrBroseph19]

Hey Eddie, thanks for the series. Really enjoying it. One comment on a useful application of the 2 switch forward - it is more ideal for space applications. Heavy ions cause single event effects that can destroy the FETs. Reducing the voltage stress on the FETs makes the design more robust against these particles. Thanks for the videos, keep them coming!

[@KissAnalog]

Thanks Nathan! Designs I did for SPACE applications were single FET Forward converters (with the reset winding). The single event typically happens shorter than a single cycle of the switching converter, so if it causes the FET to turn on (or fail) it recovers before a cycle is complete. It is more the long term beating that is the problem. I know it makes a difference whether the application is low orbit or deep space. Do I have this wrong?

[@ivanr5315]

Excellent and very interesting, thanks

[@hermannschmidt9788]

Very educational! I've always wondered what all this extra circuitry in SMPS does.

[@versace885]

Hi Eddie. top-notch tutoring, excellent video. Thank you so much.😀👍

[@KissAnalog]

Thanks so much!

[@electronicengineer]

Excellent switch mode power supply design considerations Eddie. I find it refreshing that you share your hard-won information freely like you do. I am particularly interested in your upcoming methodologies/wisdom in dealing with secondary side feedback noncompliance/runaway issues. This really is good stuff. I have long been an advocate of sinusoidal wave (versus the harmonics-laden square wave/hard switching) primary side switching, that so many consumer-grade products implement, as it yields a much quieter switch mode power supply all around from mains power input to secondary (load) output. It would be great to hear your experiences regarding actual wave shaping of the primary side, input wave, of the power supply design. Greatly reduced ringing, minimized first, third, fifth order harmonics, intermodulation distortion, etc. do not have to be cleaned up/dealt with when they are not generated from an unrefined, initial design in the first place. BTW, I really like the way you present these topics in a way that any student of electricity can understand. I think that you would make a great teacher, to be honest with you. Thanks Eddie! Fred Edited - Typographical error.

[@alexandrkuzovlev821]

Cool video! Best regards from Russia! Be healthy!

[@KissAnalog]

Thank you! Great to hear from our friends in Russia!

[@ulwur]

Great content Eddie! It's much more interesting to learn from your Lifetime of experience than those comparisons of low cost multimeters...

[@sparkyskinner4729]

Just getting my head around the duty cycle issue of the main transformer. I will have to watch this one a few times Eddie to fully understand what you have spent a life-time comprehending. Fantastic Video Eddie. Much still to learn off of this one. Maybe we can kill those nasty spikes of the switching crap !! Keep teaching me Eddie. Well done Vid. Still holding back though, just to be honest. Why deal with thousands of switch spikes per second when I really only need to deal with 60 or 120 depending on how I have configured my switcher. You have my interest. Can`t wait to see this to the end !!! Thanks Eddie.

[@billfischer7085]

You are a great teacher, I love this stuff. I am a low voltage hobby guy. Have you ever worked with a pinball flipper coil? It has 2 coils on the same bobbin. 1st pin live 50volts to 4 ohm main coil and also 164 ohm hold coil. The 2nd pin is gnd for main coil with diode to pin1, 3rd pin is gnd for hold coil with diode to pin 2. When powered, the 1/2" plunger pulls in. At the "end of stroke", main coil (pin2) is disconnected from gnd, (sparks and smell), I worry about energy, if any, going back into SMPS and fire, injury ETC. Can a supply handle this, or is a system used to protect it? A diode 1N4004, 1960's tech or good enough?

[@stevebailey1682]

Hey Eddie...man, this is good stuff. When you are done with this design, do you plan to release the full schematic? Thanks, Steve

[@KissAnalog]

Thanks Steve! I sure will - and I'll show me building it in videos;)

[@johnsonlam]

Require some basic knowledge to understand, but Eddie is good at explain why the design is good.

[@KissAnalog]

Thanks so much!

[@naeemhaq3504]

good

[@KissAnalog]

Thank you!

[@hoobsgroove]

is there any benefit if you have the capacity after the transformer on the primary to ground before the MOSFET? what would that do? what about having a floating ground on the secondary with a small resistor or capacitor any benefits?

[@KissAnalog]

Thanks for the questions. I'm not sure where you mean to place the capacitor. I'll talk about this design again and try to explain each part. Placing the capacitor between the MOSFET and transformer (if this is what you mean) would cause big problems with the MOSFET as it turns on - it would have to drain the caps which would probably kill the MOSFET. I'm not sure about your question on the floating secondary ground. If you are asking about placing a resistor from the floating ground to chassis/earth-ground, that can be done which is actually a fairly common practice so that the ground is not totally floating. But this is done in just one spot, just to ground it - but not to allow current to flow in the chassis. Using a capacitor to do this is also fairly common and it AC couples the secondary ground. I'll try to talk about this too and explain how to do it.

[@hoobsgroove]

@@KissAnalog I can't remember myself now..! it's been a long time a month 😂 thanks for the reply it's the thought that counts 😂😂

[@pristineaudio5642]

First comment

[@KissAnalog]

Awesome!