![]() After all, we don’t pepper the MOSFET symbol with any of the three primary parasitic capacitances though they, too, affect the switch’s dynamic performance and, under suitable circuit conditions, lead to switching faults. The presence of the body diode as an explicit element of the schematic symbol is an oddity. MOSFET schematics, complete with body diodes. It remains despite a number of fundamental changes in power MOSFET structure and device designs including the two most common types today - planar and trench devices. ![]() The body diode is intrinsic to the device’s structure. ![]() Unlike virtually every other active device, the power MOSFET is unusual in that its schematic symbol includes a parasitic device – the body diode. ![]()
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