Why not only change the output voltage of the SMPS (that's easy) and add an external linear current limiter (also very easy, 2 pnp's transistors with heat sink, a 0R6 resistor more two other resistors). Power dissipation will be max. 15W, that's acceptable. 15W of heat extra is 15W too much.
ISSUE #186. Adding a Flexible Current Limit. by Frederik Dostal Download PDF. QUESTION: Could I easily and precisely limit a current to my load? Answer: There are current limiting ICs available. In some power management applications, precise current limiting is required.
The on-resistance of the MOSFET thereby limits the peak charging current. For example, if the on-resistance has a value of 4 ohms, the current is limited to 7.5 A (30 V /4 ohms). A gentle start for all input voltages is therefore guaranteed. If the input capacitor is fully charged the inrush current limiting circuit is bridged to avoid power
To accomplish this most all power supplies have separate voltage and current feedback control loops to limit either the output voltage or current, depending on the load. To illustrate this Figure 1 shows a circuit diagram of a basic 5 volt, 1 amp output series regulated power supply operating in CV mode.
Details. This is a simple power supply that can deliver 600ma of current from 1.5 volts to about 20 volts.
Power supply class is extensible, and allows to define drivers own attributes. The core attribute set is subject to the standard Linux evolution (i.e. if it will be found that some attribute is applicable to many power supply types or their drivers, it can be added to the core set). It also integrates with LED framework, for the purpose of By limiting the current to a set level may DUTs are adequately protect from too much current and potential damage. When in current limit, if the overload goes away the power supply automatically goes back to constant voltage (CV) operation. However, current limit may not be quite enough for some DUTs that are very sensitive to overloads. 9. I'm trying to limit a current of a 5V power supply to 100uA. I first thought of putting in a 50k resistor. That will never allow above the threshold. Unfortunately, the load requires at least 4.5V and varies in the amount of current in needs. So this is obviously a too simple approach for the problem. My understanding is that the PSU should only supply voltage (i.e. energy to the electrons in the circuit wires) and the supplied current should only depend on the resistance of the wire or the internal resistance of supply or component attached, i.e. a resistor or LED? .
  • 7s3uhk47r8.pages.dev/307
  • 7s3uhk47r8.pages.dev/96
  • 7s3uhk47r8.pages.dev/188
  • 7s3uhk47r8.pages.dev/254
  • 7s3uhk47r8.pages.dev/303
  • 7s3uhk47r8.pages.dev/431
  • 7s3uhk47r8.pages.dev/298
  • 7s3uhk47r8.pages.dev/38

    • power supply with current limit