Abstract: A multi-phase voltage regulator module system includes a VRM and a phase control circuit. The VRM is capable of outputting a load detecting voltage which is direct proportion to the load of the CPU. The phase control circuit outputs a first level phase switching signal to the VRM, and a core voltage outputted by the VRM to the CPU is changed from N phases to M phases when the load detecting voltage increases to a first voltage. The phase control circuit a second level phase switching signal to the VRM, and the core voltage outputted by the VRM to the CPU from M phases to N phases when the load detecting voltage decreases to a second voltage. The first voltage is higher than the second voltage. M is larger than N.

Abstract: The invention relates to a switching power circuit connected to a motherboard of a computer system. The switching power circuit includes a PWM circuit and a snubber circuit. The PWM circuit includes a phase terminal, and it may output an output voltage to the motherboard via the phase terminal. The snubber circuit includes a zener diode. A negative terminal of the zener diode is connected to the phase terminal, and a positive terminal is connected to the ground terminal. The level of a breakdown voltage of the zener diode is equal to the level of the output voltage in a steady state.

Abstract: A charge device includes a charge circuit and a monitoring circuit. The charge circuit includes a current limiting element, a rectifier element, and a DC voltage supply unit. The rectifier element is connected with the current limiting element in series. The DC voltage supply unit is used for providing a DC voltage to the battery to charge the battery via the current limiting element and the rectifier element connected with the current limiting element in series. The monitoring circuit includes a temperature sensing unit and a first control unit. The temperature sensing unit is used for sensing a surface temperature of the battery. The first control unit is used for controlling the DC voltage supply unit to stop charging the battery when the surface temperature is higher than a predetermined temperature.

Abstract: A multi-phase voltage regulator module system includes a VRM and a phase control circuit. The VRM is capable of outputting a load detecting voltage which is direct proportion to the load of the CPU. The phase control circuit outputs a first level phase switching signal to the VRM, and a core voltage outputted by the VRM to the CPU is changed from N phases to M phases when the load detecting voltage increases to a first voltage. The phase control circuit a second level phase switching signal to the VRM, and the core voltage outputted by the VRM to the CPU from M phases to N phases when the load detecting voltage decreases to a second voltage. The first voltage is higher than the second voltage. M is larger than N.

Abstract: The invention relates to a switching power circuit connected to a motherboard of a computer system. The switching power circuit includes a PWM circuit and a snubber circuit. The PWM circuit includes a phase terminal, and it may output an output voltage to the motherboard via the phase terminal. The snubber circuit includes a zener diode. A negative terminal of the zener diode is connected to the phase terminal, and a positive terminal is connected to the ground terminal. The level of a breakdown voltage of the zener diode is equal to the level of the output voltage in a steady state.