The LM2575 Switching Voltage Regulator -

[@kensmith5694]

A few things to also mention: If you are working with an input voltage greater than about 10V, it is worth replacing the 1N5819 with an SBR diode. An SBR conducts like an Schottky but doesn't leak much. This chip can also be used to turn an unregulated positive supply into a regulated negative supply. It is useful to parallel multiple capacitors to make the large capacitor values. This makes the impedance lower. It is easy to find "dual inductors" that look a lot like a transformer but really are designed as inductors. You can use this to make low powered parasite supplies along with the main supply output. This can be useful to power a few op-amps in some 3.3V digital system

[@davidworth4692]

Best wishes for the new year. Always informative, clear and well delivered. Thank you.

[@LockdownElectronics]

Thank you Wishing you all the best for 2025!

[@Yonni6502]

This is a great part! Well done!

[@LockdownElectronics]

Thank you!

[@Yonni6502]

@@LockdownElectronics No, thank you! You're channel is really fun. I love seeing all your content. Thank you for taking the time to share your knowledge and experience with all us aspiring engineers!

[@TRONMAGNUM2099]

Excellent video. Happy New Year!

[@LockdownElectronics]

Thank you 😃 Wishing you all the best for 2025!

[@BJcanal270]

Thanks for sharing your knowledge. Happy new year.

[@LockdownElectronics]

Wishing you all the best for 2025!

[@JaenEngineering]

This is a cool little part, will definitely add some to my order padding list. Would have been interesting to see a trace of the actual pwm output as well as the filtered output.

[@davidt7317]

An interesting component and well worth a tryout. Hope you have happy New Year in 2025.

[@darz3]

Happy New Year

[@LockdownElectronics]

Wishing you all the best for 2025!

[@lezbriddon]

Beware of cheap fakes of this that don't like 40v inputs and can be just as poppy with high outputs. (Same with cheap Arduino/esp boards many are good to 12v, but it you put one in a car and the charging of the battery gets it above 14v I have seen them (1117 5v regulartor) go short and pop the lot....

[@StepDub]

How do these performer in high quality audio circuits like synthesisers? Is output noise a problem?

[@JohnAranita]

The best electronics project I made was a variable AC to DC power supply, in the 1980s.

[@kensmith5694]

I have a fairly hefty "bench supply" that I made in about that same era that I still use today. Mine has 3 isolated outputs that are basically 3 LM317 regulatiors being helped by a lot of transistors.[1] This go up to about 30V and one does about 2 to about 6V [1] The circuit for doing this involves putting a resistor in the supply line feeding the regulator and using that to bias a PNP transistor on to add some more current to the output side. I, however added a resistor in the collector connection of the PNP and then used that to bias on a parallel combination of several TIP35 transistors. This really spread the heat out and lets me get peak currents over 10A into things that draw current in pulses.

[@JohnAranita]

@@kensmith5694 I never had as much skill as you.

[@kensmith5694]

@@JohnAranita ... or is it that you don't have that skill yet? Stuff is learned in most cases

[@JohnAranita]

@@kensmith5694 Yeah, I moved beyond the hobby for many years. : - )

[@kensmith5694]

@@JohnAranita :) :) :)

[@Андрей-х1ь8ч]

каким образом LM2575 касается этого устройства?

[@wherami]

When the number is scratched off it means it was stolen off a product line and resold on their black market which is how the stuff is so cheap. Or it was malfunctioning and then stolen from discard pile to be resold.

[@kensmith5694]

It can be that or it can be that they have a policy of hiding part numbers for reasons they forgot long ago. I have seen a case where the cost of production was lowered by someone asking "why are we hiding the part numbers"

[@tookitogo]

Nah, it’s just manufacturers who want to obfuscate their circuit designs.

[@wherami]

@ no thats flat out untrue and naive

[@tookitogo]

@@wherami LOL no. You occasionally see it in high-price western products, too.

[@wherami]

@ sigh. You are very uninformed.

[@luminousfractal420]

thumbs down for the unnecessary china hate....usa patent wars..just sayin.

[@tlum4081]

China hate? Just the facts about copying others but not thee.