Patent ID: 6700339
Filing Date: 2004-03-02
Classification: G06F,H02P,H05K

Abstract:
An information handling system, comprising:a microprocessor for executing instructions stored in a memory coupled thereto; a fan for cooling said microprocessor during operation thereof, said fan comprising a fan motor and a fan blade coupled to a shaft of said fan motor, wherein the shaft rotation speed is proportionate to a variable direct current (DC) voltage level applied to said fan motor; a voltage regulator coupled between said fan motor and a first DC power source, said voltage regulator controlling the variable DC voltage level applied to said fan motor, wherein the DC voltage level applied to said fan motor can be any voltage from about ground to about the first DC power source voltage; a power management controller having a speed control pulse output; and a pulse-to-DC voltage converter, said pulse-to-DC voltage converter coupled between the speed control pulse output of said power management controller and a control input of said voltage regulator, whereby said power management controller controls said fan motor shaft speed.