TAJD336M016RNJ_TAJD336M016RNJ Introduction

In electronic circuits, MOS tubes and IGBT tubes will often appear, and they can be used as switching elements. MOS tubes and IGBT tubes are also similar in appearance and characteristic parameters, so why do some circuits use MOS tubes? And some circuits use IGBT tubes? . The difference between MOS tube and IGBT tube.

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But there are parasitic diodes between the D pole and the substrate. If it is a single transistor, the substrate is of course connected to the S pole, so there is naturally a diode between the DS. So what does the parasitic diode do? When a large instantaneous reverse current is generated in the circuit, it can be derived through this diode, so as not to break down the MOS tube. (plays the role of protecting the MOS tube). The analog circuit book talks about the structure of low-power MOS tubes, so there is no such diode. If in the IC, the N-MOS substrate is connected to the lowest voltage, and the P-MOS substrate is connected to the highest voltage, which is not necessarily connected to the S pole, so there is not necessarily a parasitic diode between DS.

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The circuit that makes the transistor work only in the 1 and 3 states is called a switching circuit. Generally, the transistor is turned off, and the collector does not absorb current to indicate the off; when the transistor is saturated, the voltage difference between the emitter and the collector is close to 0V. .

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