Driver Requirement for Power MOSFET: A Practical Observation

Power MOSFET is a voltage-controlled device generally used for switching purpose. To get the MOSFET in operation, appropriate voltage should be applied to the gate- source terminal. The ON and OFF operation of MOSFET depends upon the charging and discharging behaviour of the parasitic capacitances. For low frequency, a normal pulse generating circuit without a driver is suitable but the switching losses can be an issue of concern. A suitable driver circuit is required for the proper switching at high frequency. This paper describes the practical observation for a switching circuit containing RL load and Power MOSFET in two different cases- with driver circuit and without driver circuit at two different switching frequencies (Low-50Hz and High- 50kHz).