Patent ID: 8643351
Filing Date: 2014-02-04
Classification: H02M

Abstract:
1. A switching mode power supply, comprising: an input port configured to receive an input signal; a storage port configured to provide a storage voltage; an inductor having a first terminal and a second terminal, wherein the first terminal is coupled to the input port to receive the input signal; a power stage coupled between the second terminal of the inductor and the storage port; a storage capacitor coupled between the storage port and ground to store energy; a boost controller configured to receive a feed forward signal indicative of the input signal, and to generate a boost control signal to control the power stage to operate in boost mode when the input signal is higher than a boost threshold; and a buck controller configured to receive the feed forward signal indicative of the input signal, and to generate a buck control signal to control the power stage to operate in buck mode, when the input signal is lower than a buck threshold and when the storage voltage is higher than the input signal; wherein the buck threshold is lower than the boost threshold.