Fyre Storm, Inc.

David F Fraser

Kent Kernahan

Jack Roan

The output voltage of a power converter is controlled by comparing the output voltage to a target output voltage during a first time interval and calculating an inductor current required in a second time interval immediately following the first time interval to increase the output voltage to the target output voltage. A duty cycle of a switch is varied to modify the current in the inductor during the second time interval according to the calculated inductor current. In one embodiment a fixed duty cycle response is provided if the output voltage is less than a predefined maximum and greater than a predefined minimum. In another embodiment the duty cycle of the switch is bounded by a predetermined maximum and minimum value.

METHOD OF REGULATING AN OUTPUT VOLTAGE OF A POWER CONVERTER BY SENSING THE OUTPUT VOLTAGE DURING A FIRST TIME INTERVAL AND CALCULATING A NEXT CURRENT VALUE IN AN INDUCTOR SUFFICIENT TO BRING THE OUTPUT VOLTAGE TO A TARGET VOLTAGE WITHIN A SECOND TIME INTERVAL IMMEDIATELY FOLLOWING THE FIRST TIME INTERVAL AND VARYING A DUTY CYCLE OF A SWITCH DURING THE SECOND TIME INTERVAL

The output voltage of a power converter is regulated by comparing the output voltage to a target output voltage during a first time interval and calculating an inductor current required in a second time interval immediately following the first time interval to increase the output voltage to the target output voltage in the second time interval. The duty cycle of a switch in the power converter is varied to modify the current in the inductor during the second time interval according to the calculated next current and a saturation current of the inductor. In one embodiment the power converter includes a reference resistor. By measuring the voltage across the reference resistor at certain times various parameters, including coil inductance and capacitor capacitance, are calculated. In some embodiments a linear model of the power converter is used.

METHOD OF REGULATING AN OUTPUT VOLTAGE OF A POWER CONVERTER BY CALCULATING A CURRENT VALUE TO BE APPLIED TO AN INDUCTOR DURING A TIME INTERVAL IMMEDIATELY FOLLOWING A VOLTAGE SENSING TIME INTERVAL AND VARYING A DUTY CYCLE OF A SWITCH DURING THE TIME INTERVAL FOLLOWING THE VOLTAGE SENSING TIME INTERVAL

A power converter output voltage regulation method in which sensed output voltages and sensed currents are stored in a memory during a plurality of time intervals. In each time interval the sensed output voltage and the sensed current is compared with the sensed output voltage and sensed currents in time intervals previously stored in the memory. If preceding data are found to match the most recent data, an open loop response is applied. If the most recent data and stored previous data do not match, a closed loop response is applied.

Growing community of inventors

Los Altos, CA, United States of America

David F Fraser