Most common current-limiting implementations have a voltage drop that's too high for today's systems with their low-voltage supply rails; this design with its far lower voltage

The LTC3855 is a current-mode control device with cycle-by-cycle current limiting. The sense resistor RS monitors the current. Figure 1: The switch mode power supply current sense resistor (RS). Figure 2 shows a scope image of the inductor current for two cases: in one case, with a load that the inductor current is capable of driving (red line

Depending on the type of your power supply, the effects will vary. If it is a smart power supply with CC and CV modes, the current will be limited to 1A (in CC mode) and the voltage will be reduced. In the case of a dumb power supply, either a safety mechanism will be triggered (a fuse or a breaker) or it will continue to work at a undesired state.

Most all power supplies regulate either their output voltage or output current at a constant level, depending on the load resistance relative to the power supply's output voltage and current settings. This can be summarized as follows: · If R load > (V out / I out) then power supply is in CV mode. · If R load < (V out / I out) then power
Adding a Current Limit Feature to a Buck/Boost Converter: In this project we will have a closer look at a common buck/boost converter and create a small, additional circuit that adds a current limit feature to it. With it, the buck/boost converter can be used just like a variable lab bench power supply. Le…
Here is a much better 2-transistor current limit circuit. As with all simple limiter circuits, the output voltage will decrease slightly until the current limit is reached. In this case, the output voltage will decrease from 12 V at 0 mA to approximately 11.4 V when the the output current is at the limit defined by Rsense.
Figure 3: Fuse in output of power supply Constant Current Limiting. A common method that has been implemented to limit the output current from power supplies is to monitor the output current and reduce the output voltage when the current limit is reached while maintaining the maximum output current (Figure 4). 2CzMDgo.
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    • power supply with current limit