Patent ID: 9653997
Date: 2017-05-16
CPC Classifications: H02M

Claim:
1. A method of controlling a power converter for converting a DC input voltage to a DC output voltage, wherein the power converter comprises an inductor, one or more switching elements for energizing and de-energizing the inductor, a drive circuit for controlling switching operation of the one or more switching elements in accordance with a control signal, and a feedback circuit for generating the control signal on the basis of a first feedback quantity indicative of an actual output voltage of the power converter and in accordance with one or more circuit parameters of the feedback circuit, the method comprising: detecting an open loop condition of feedback control by the feedback circuit; and modifying at least one of the circuit parameters of the feedback circuit in such a manner that a time until the feedback control returns to the closed loop condition is reduced, wherein the feedback circuit generates the control signal on the basis of the first feedback quantity and a fourth feedback quantity indicative of a sum of a fifth feedback quantity indicative of a result of a conversion of a second feedback quantity indicative of an inductor current to a voltage value and a sixth feedback quantity indicative of a voltage output by a ramp generator; and modifying the at least one of the one or more circuit parameters involves: increasing a gain factor that is applied in the conversion of the second feedback quantity to the voltage value.