Large Package MOSFET Design Knowledge

When designing a switching power supply or motor drive circuit using a large package MOSFET, most people consider the on-resistance of the MOSFET, the maximum voltage, etc., the maximum current, etc., and there are many who consider only these factors. Such circuits may work, but they are not excellent and are not allowed as formal product designs.

The following is a little summary of the basics of MOSFETs and MOSFET driver circuits, which references some information, not all original. Including the introduction of MOSFET, characteristics, drive and application circuits.

1, MOSFET type and structure: MOSFET is a FET (another JFET), can be manufactured into enhanced or depletion type, P-channel or N-channel a total of four types, but the actual application of only enhanced N-channel MOSFETs and enhanced P-channel MOSFETs, so usually referred to as NMOSFETs, PMOSFETs refers to these two.