Timeline for Switch-mode power supply output voltage manipulation via feedback node
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 13, 2018 at 11:44 | comment | added | bobflux | @OlinLathrop well, the FB voltage is the constant ref voltage plus the error voltage... so using a variable resistor will change feedback factor, transient response, noise, maybe require compensation, etc. | |
| Apr 13, 2018 at 11:42 | history | edited | bobflux | CC BY-SA 3.0 |
added 114 characters in body
|
| Apr 13, 2018 at 10:48 | comment | added | Olin Lathrop | Note that a variable resistor from the feedback pin to ground is a current sink because the feedback voltage is constant in closed loop operation. | |
| Apr 12, 2018 at 17:06 | comment | added | Barleyman | Sinking current from the FB node works just as well, e.g. LED drivers use that method to adjust SMPS voltage to match actual LED voltages. | |
| Apr 12, 2018 at 16:43 | history | answered | bobflux | CC BY-SA 3.0 |