Patent ID: 9041372
Filing Date: 2015-05-26
Classification: H02M

Abstract:
1. A switching power converter, comprising: an unregulated DC/DC converter stage which receives an input voltage Vin and produces an output bus voltage; at least one configurable buck-boost converter stage which receives the DC/DC converter output bus voltage and produces an output voltage Vout; and at least one mode selection module arranged to configure said buck-boost converter stage to operate in a buck, boost or buck-boost mode, wherein said configurable buck-boost converter stage comprises: an inductor; a capacitor; a first switch connected between an input to said buck-boost converter and the first end of said inductor; a second switch connected between a first end of said inductor and a circuit common point; a third switch connected between the second end of said inductor and said circuit common point; and a fourth switch connected between the second end of said inductor and said capacitor; said switching power converter arranged to operate said switches in any of a buck converter mode, a boost converter mode, and a buck-boost converter mode to produce a desired output voltage Vout across said capacitor, wherein said mode selection module comprises: