Current-Limiting Circuit. A current-monitoring circuit protects a 28-Vdc power supply against an overload. The current-limiting element in this circuit consists of a pair of power metal oxide/semiconductor field-effect transistors (MOSFET's).
power supply - Current limiting using P-CH MOSFET - Electrical Engineering Stack Exchange. Current limiting using P-CH MOSFET. Ask Question. Asked 6 years, 7 months ago. Modified 6 years, 3 months ago. Viewed 8k times. 1. I am currently building variable voltage/variable current (lab) power supply out of an ATX switching power supply.
\$\begingroup\$ yup, 1 additional note: Foldback current protection is much more important for a linear supply than it is for a switching supply such as those you listed. Linear supplies increase their power dissipation as the difference between Vin and Vout increases. Because of this, when the current limit is hit and voltage begins to drop, power dissipation increases even if the current is
Often a power supply design team will browse potential thermistors from different suppliers and seek to balance thermistor inrush current characteristics against the impact on power supply efficiency. An example NTC thermistor suitable for inrush current limiting in AC-DC power supplies is the TDK B57464S109M. This thermistor has a nominal
If one has enough space, and is operating at low enough power levels, that having the supply draw the maximum current from its source transform and dissipate all the power as heat would not pose a problem, a transformer, a regulator, some caps, a handful of resistors and two LM317 regulators would suffice [without current limiting one would
The voltage and current controls on a bench power supply both function as limits, not settings. If you want to supply a specific voltage to the load, adjust the voltage control to that voltage. The power supply will deliver that voltage unless the output current goes above the setting of the current limit control, in which case it will reduce
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power supply with current limit
