Asustek Computer Inc.

Sheng-Chieh Su

Jung-Tai Chen

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.

Multi-phase voltage regulator module system

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.

Growing community of inventors

Taipei, Taiwan

Sheng-Chieh Su