What is switch current limit?
The adjustable current limit can be used to clamp overload current, deliver constant current, control inrush current and reduce the amount of current flow during short to ground events. This can result in lower system costs by reducing the size of passive components, cables, connectors and PCB traces.
What is current limit threshold?
Current limit threshold is programmed by connecting a resistor from the SETI pin to GND. When the device current reaches the programmed threshold, the controller inside the device prevents further increase in current by modulating the internal NFET resistance.
What is a Class 2 or LPS power supply?
Class distinction Limited Power Source (LPS) power supply which relates to the VA rating of the output being limited. A class 2 power supply has a maximum output VA rating of 100VA if the power factor is less than 0.9 or 100W if the power factor is above 0.9.
How is current limiting used in power supply ICs?
As the feature is normally incorporated into regulated power supply integrated circuits, the additional cost of using foldback limiting against constant current limiting is not noticeable. Accordingly foldback current limiting is virtually always used in these ICs.
Why is current limiting important in linear power supplies?
Current limiting is a key feature of all power supplies. With electronic devices being left powered up almost permanently and often left unattended, safety features like current limiting are essential in linear power supplies as well as switch mode power supplies.
How does current limiter circuit reduce power overload?
In this way, the current is reduced the greater the overload, and thereby the risk of damage is reduced.
What are the different types of power supply circuit?
Power Supply Current Limiter Circuits 1 Types of current limiting. As with any technology and type of electronic circuit, there are a few options from which to choose. 2 Basic constant current limiting circuit. 3 Two transistor linear power supply regulator with current limiting. 4 Transistor foldback current limited circuit.