Abstract: A switch module with an automatic switching function and a method for automatically switching the switch module according to the load, wherein a first comparator and a second comparator are configured to automatically determine whether the load is light or heavy according to the voltage divided by a first resistor and a second resistor and the voltage of a source resistor, thereby generating a voltage control signal. A plurality of transistors are configured to receive a gate input signal according to the voltage control signal, thereby selectively bringing a GaN transistor or a MOSFET transistor in a conducting state. In this way, the output quality and efficiency of the power supply at light and heavy loads can be improved according to the characteristics of different transistors.

Abstract: An electromagnetic interference regulator by use of capacitive parameters of the field-effect transistor for detecting the induced voltage and the induced current of the field-effect transistor to determine whether the operating frequency of the field-effect transistor is within the preset special management frequency of electromagnetic interference. When the basic frequency and the multiplied frequency exceed the limit, the content of the external capacitor unit can be adjusted to assist the products using field-effect transistors to maintain excellent electromagnetic interference adjustment capabilities under various loads, thereby optimizing the characteristics of electromagnetic interference.

Abstract: A circuit with a metal-oxide semiconductor field-effect transistor and a diode module is applied to a power factor correction circuit, which can effectively reduce the heat generated by the whole system under heavy load. The circuit includes a metal-oxide semiconductor field-effect transistor and a diode module and a load determination unit. The diode module includes a plurality of diodes with a switch. The load determination unit can control the connection/disconnection of each diode in the diode module based on the magnitude of the load current. It can effectively reduce the current generated by each diode due to the load, thereby reducing the heat generation of the overall system. Moreover, due to the contact capacitance effect after the diodes are connected in parallel, the electromagnetic interference (EMI) characteristics of the power factor correction circuit of the system can be further optimized.

Abstract: A metal-oxide semiconductor field-effect transistor with asymmetric parallel die and an implementation method thereof, comprising an inductor, a load recognition control unit and a metal-oxide semiconductor field-effect transistor having a first die, a second die, and a switch. The first die is larger in size than the second die. The inductor can produce a voltage signal when the load changes. The switch is controlled by the load recognition control unit such that different dies are switched on under different load conditions, thereby improving efficiency under light load condition in addition to reducing volume and cost.

Abstract: An electromagnetic interference regulator by use of capacitive parameters of the field-effect transistor for detecting the induced voltage and the induced current of the field-effect transistor to determine whether the operating frequency of the field-effect transistor is within the preset special management frequency of electromagnetic interference. When the basic frequency and the multiplied frequency exceed the limit, the content of the external capacitor unit can be adjusted to assist the products using field-effect transistors to maintain excellent electromagnetic interference adjustment capabilities under various loads, thereby optimizing the characteristics of electromagnetic interference.