Abstract: A power supply device for a server device includes a power supply circuit, a control microchip, and a compensation element. The compensation element is a resistor having a negative temperature coefficient. The control microchip controls the power supply circuit to generate an output voltage to power the server device in response to receiving a voltage of an external power supply. When the power supply device generates excessive heat in use, a resistance of the compensation element decreases to maintain a total resistance of the power supply device at substantially an original value.

Abstract: A power supply circuit is configured for supplying power to a central processing unit (CPU). The power supply circuit includes a pulse-width modulation (PWM) controller, a driving integrated circuit (IC), a first transistor, a second transistor, and a voltage regulator. The PWM controller is capable of outputting a PWM signal to regulate a voltage supplied to the CPU. The driving IC is connected to the PWM controller and capable of outputting a first driving signal and a second driving signal according to the PWM signal. The first transistor is connected to the driving IC and controlled by the first driving signal. The second transistor is connected to the driving IC and controlled by the second driving signal. The voltage regulator is capable of regulating a voltage of a power source to an optimized voltage and supplies the driving IC with the optimized voltage.

Abstract: A field-effect transistor (FET) includes a body, a gate, a source, a drain, a capacitor, and a resistor. The gate, the source, and the drain are connected to the body. A first terminal of the capacitor is connected to the gate. A second terminal of the capacitor is connected to the source through the resistor. The body with the gate, the source, the drain, the capacitor, and the resistor are packaged together as a whole.

Abstract: A power supply circuit is configured for supplying power to a central processing unit (CPU). The power supply circuit includes a pulse-width modulation (PWM) controller, a driving integrated circuit (IC), a first transistor, a second transistor, and a voltage regulator. The PWM controller is capable of outputting a PWM signal to regulate a voltage supplied to the CPU. The driving IC is connected to the PWM controller and capable of outputting a first driving signal and a second driving signal according to the PWM signal. The first transistor is connected to the driving IC and controlled by the first driving signal. The second transistor is connected to the driving IC and controlled by the second driving signal. The voltage regulator is capable of regulating a voltage of a power source to an optimized voltage and supplies the driving IC with the optimized voltage.