Due to the use of the driver chip, its output impedance is low, directly driving the power tube will cause the driven power tube to be turned on and off quickly, which may cause voltage oscillation between the drain and source of the power tube,or it may cause the power tube to suffer from excessive di/dt and cause false conduction.In order to avoid the occurrence of the above phenomenon, a resistor is usually connected in series between the output of the MOS driver MOS晶体管的栅极和电阻器的大小通常被选为数十欧姆。