Patent ID: 8867947
Filing Date: 2014-10-21
Classification: G03G,G05F,H02M

Abstract:
1. A power supply control device comprising: a switching regulator; a linear regulator; a switching unit configured to switch between the switching regulator and the linear regulator so that either the switching regulator or the linear regulator serves as a power supply to a load; a consumed current detection unit configured to detect a consumed current based at least on either the switching regulator or the linear regulator serving as the power supply to the load; a current determination unit configured to determine whether or not the consumed current detected by the consumed current detection unit is greater than or equal to a predetermined current; and a power determination unit configured to detect a consumed power of either the switching regulator or the linear regulator serving as the power supply to the load and determine whether or not the consumed power is greater than or equal to a predetermined power, wherein the predetermined power is lower than a power at which the linear regulator is expected to perform thermal protection, and wherein the switching unit makes the linear regulator serve as the power supply to the load only when a first determination result shows that the consumed current is lower than the predetermined current and a second determination result shows that the consumed power is lower than the predetermined power.