Patent ID: 9356517
Filing Date: 2016-05-31
CPC Classification: G05F,H02M

Claim Text:
1. A method of determining output inductor current for a DC-DC switching regulator including a bypass switch coupling ends of the output inductor and an output capacitor, comprising: determining a first change in capacitor voltage of the output capacitor over a first time period during which the bypass switch is open; determining a first capacitor current value based on the first change in capacitor voltage, the first time period, and a capacitance of the output capacitor; determining a second change in capacitor voltage of the output capacitor over a second time period during which the bypass switch is closed; determining a second capacitor current value based on the second change in capacitor voltage, the second time period, and the capacitance of the output capacitor; and summing the first capacitor current value and the second capacitor current value to obtain an indication of output inductor current.