As shown in Figure 4, the current limiting circuit consists of a power transistor Q1 (TIP31C). The LED array A is connected to the collector of Q1. Q1 is biased using resistor R1. In the emitter ...

His fabricated simulation circuit worked perfectly. ... I think tekkieneet is suggesting to use the zener diode as a shunt regulator, with a resistor in series to limit the current through the diode.

Another circuit for hot-swap applications (Figure 2) uses a pnp transistor (Q1) and current-sense resistor (R1) to provide continuous current sensing and limiting. As power is applied, current flows ...

With a limiting resistor, the amount of current such a varying load draws will change as the effective resistance changes. But with our simple transistor circuit, 20 mA will always flow. Well ...

Series-resistor current limiting ... the motor-drive supply voltage is 5 V. Ohm’s Law is used to calculate total circuit resistance at 2.5 Ω to limit current through the winding to its 2-A ...

1. A simple, widely used current limiter consists of a current sensor (usually a low-value sense resistor), a control circuit, and a pass transistor.

MALVERN, Pa., Oct. 30, 2024 (GLOBE NEWSWIRE) -- Vishay Intertechnology, Inc. (NYSE: VSH) today introduced a new series of inrush current limiting positive temperature coefficient (PTC) thermistors ...

Foldback current limiting allows circuit elements to withstand transient currents without over-designing for maximum load conditions. Kevin A. Mussmacher, P.E. and William L. Froeb, National ...

IT is well known that changes in the d.c. characteristics of transistor amplifiers with temperature are particularly severe, and tend to limit the range over which these devices can operate. The d ...