Timeline for DC Supply Load Dummy based on NPNs
Current License: CC BY-SA 3.0
5 events
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| Aug 24, 2015 at 22:53 | comment | added | Houston Fortney | Also, you should increase R4 such that with the knob all the way up it doesn't break the output stages. | |
| Aug 24, 2015 at 22:13 | comment | added | Houston Fortney | For the long answer see this. The really short version: Feedback circuits sometimes oscillate and these oscillations can be fixed with a capacitor from the op amp's output to the op amp's inverting input and a resistor in the feedback. You may not have a stability issue but I always put pads for compensators on my boards just in case. | |
| Aug 24, 2015 at 22:01 | comment | added | przeski | Thank you for answer. I am aware of the power dissipation, and my heatsinks are quite big. It already worked with 15A current. I probably won't need bigger. 24A is just teoretical. :) Can you tell me more about this compensation network? Why it is in your opinion desirable in this design? | |
| Aug 24, 2015 at 21:44 | comment | added | Houston Fortney | @WhatRoughBeast I started typing before I saw your post. Sorry for any redundancies. | |
| Aug 24, 2015 at 21:43 | history | answered | Houston Fortney | CC BY-SA 3.0 |