A current limiting circuit aids in power supplies by ensuring overall protection where there may be an overload or short circuits. Generally, you will find current limiters fitted in electronic components to prevent future damages during power supply. They are among the standard features needed in regulating power supplies Integrated Circuits
Because of the power dissipation capability of 2N3055 transistor, at the worst case that the load is shorted to ground (zero resistance), if you limit the current to 8.4 A then the circuit can handle maximum source voltage of 14V, while limiting the current at 4.2A can handle up to 27V source voltage.
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. In comparison a constant voltage/current limiting (CV/CL) power supplies are intended to be used only as a voltage source while providing over-current protection for the DUT, as well as protection for the power supply itself. Figure 2 depicts typical output characteristics of a CV/CL power supply. Figure 2: Operating locus of a CV/CL power supply.
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
To summarize the situation, the switching power supply designer is faced with a dilemma. He can design the current limit circuitry for high gain to obtain a sharp limiting knee, and large bandwidth One method frequently used to stabilize the supply is to narrowband the current limit amplifier. For the case where s d = (Eq. 3) 2 s a + s c Draw a schematic of your circuit. I suspect what's killing you is the power-on surges. Try placing a 10 10 Ω resistor between the output of your 4-diode bridge's positive terminal and C1 C 1. For starters, anyway. R2 R 2 200 mA 2V 2 V with the addition, at C1 C 1. But I'm mostly curious if this helps you.
Because I wanted to limit current travelling through a12v circuit and while searching for something to do it on a component site, a rectifier was suggested. The load resistance is variable (two electrodes in distilled water) and in the process of applying power, the resistance decreases. Controlling the current between 200mA and 400mA will
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    • power supply with current limit