.. 4. Q 2 pulse area servoed to voltage reference. Figure 4 relies on the ability of adjustable voltage references like the TL431 to act as analog comparators/integrators with accurate built-in thresholds, as shown in Figure 5. Figure 5. ...
.. circuit in Figure 1 is a high-power analog of the popular TL431 programmable shunt regulator. This two-terminal circuit is convenient when the drain of the P-channel FET is ...
.. short-circuit-protection circuitry. In this application, the regulation takes place on the secondary side by means of the TL431 , but the primary level assumes importance in short-circuit conditions. Each time the NCP1200’s V CC ...
.. in this design is for lower attenuation in the thermal feedback, hence a more precise compensation can be achieved. TL431 is preferable to an ordinary Zener diode since the TL431 has far lower dynamic resistance and allows for a ...
.. only minimizes turn-on losses, but also reduces electrical noise. Voltage regulation uses traditional techniques, using a TL431 . The optocoupler current adds to the shunt current. Because the MOSFET turns on when current is zero, the gate ...
.. example. IC 3 , R 1 , R 2 , and V 1 form the feedback circuit to set the output voltage. The output-voltage equation is The TL431 is a popular part for setting a voltage reference and can easily create the 1.25 V shown for V 1 . You can ...
.. circuit is 1.25 V. The operation of the circuit revolves around the TLV431 shunt regulator. This IC is based on the popular TL431 shunt regulator. The difference is that the TLV431's internal reference is 1.25 V, as opposed to 2.5 V for ...
.. charged to a particular potential. I was convinced that there must be a way that a programmable zener diode, such as the TL431 , could be used but I found no simple circuits. My first thought was just to connect a series current limiting ...
.. pressed, the whole circuit is in sleep mode, drawing zero current. Closing SW1 allows Q2 to conduct with the aid of IC1, a TL431 programmable zener, which in turn powers IC2 and MOSFET Q3. Figure 2. Controllable LED boost converter. At this ...