Patent ID: 8164317

Claim:
A power system with temperature compensation control, for selectively supplying power from an external power source or a battery to a load, or charging the battery from the external power source, the power system comprising: a buck converter electrically connected between the external power source and the load, and a temperature compensation control circuit for adjusting an output voltage of the buck converter according to a sensed temperature; wherein the output voltage is set within a range between an upper limit and a lower limit, the output voltage being allowed to reach the upper limit when the sensed temperature is lower than a predetermined temperature, and the output voltage being higher than or equal to the lower limit but not allowed to reach the upper limit when the sensed temperature is higher than the predetermined temperature; and wherein when the sensed temperature is higher than the predetermined temperature, a maximum level of the output voltage decreases as a temperature difference between the sensed temperature and the predetermined temperature increases.