Timeline for High current "booster" circuit with 2 outputs?
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 29, 2021 at 19:14 | vote | accept | Yordan Yanakiev | ||
| Jun 27, 2021 at 17:22 | comment | added | Yordan Yanakiev | To be honest I was looking for a cheap way to have both voltages, Mouser things is quite expensive in here. To fit all requirements this doesnt-look-expensive circuit done with buck converters will go about 30 euro on me. Well it's not much , but since i wish to use it as a cheap way for my other projects - I just don't wanna spend it that way. That's all :| | |
| Jun 27, 2021 at 17:16 | vote | accept | Yordan Yanakiev | ||
| Jun 27, 2021 at 17:16 | |||||
| Jun 27, 2021 at 5:14 | comment | added | user66377 | electronics.stackexchange.com/questions/165612/… | |
| Jun 27, 2021 at 4:30 | comment | added | Hearth | Your circuit also doesn't seem to have any reason to have R25 or R26 there, so those are just wasting a bit of power, but not anything significant. | |
| Jun 27, 2021 at 4:29 | comment | added | Hearth | Right, because you don't want to regulate the base voltage, you want to regulate the output, which is the collector. The voltage regulator acts to hold the collector at 24 volts, and the resistor between the base and emitter means that as more current gets drawn through the regulator, more current bypasses the regulator through the transistor. I don't doubt that your circuit works, it's just going to output less than 24 volts, and it will be less well regulated because you're not sensing the actual output voltage. | |
| Jun 27, 2021 at 4:18 | comment | added | user66377 | Why are you arguing about something I know works. and Then explain why the other circuit is better when it is taking its input from the unregulated side of the circuit. The base of the PNP transistor goes to the 27 volt source instead of the regulate output. | |
| Jun 27, 2021 at 4:12 | comment | added | user66377 | Why are you arguing about something I know works. Then explain why the other circuit is better when it is taking its input from the unregulated side of the circuit. | |
| Jun 27, 2021 at 4:07 | comment | added | Hearth | I'd like to see their explanation of the merits of this circuit over the PNP variant that actually has the output as part of the control loop. | |
| Jun 27, 2021 at 4:01 | comment | added | user66377 | If you want to talk to the original engineer of this circuit they would not like your response since it was used for over 20 years in their design. | |
| Jun 27, 2021 at 3:58 | comment | added | Hearth | I'm pretty sure this is a worse design than the original... Why would you use an emitter follower here and have the output be outside the control loop? The design in the original question will work better than this one. | |
| Jun 27, 2021 at 3:53 | history | answered | user66377 | CC BY-SA 4.0 |