Patent ID: 11886264
Assignee: CYPRESS SEMICONDUCTOR CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 15:
16. A method of operating a Universal Serial Bus (USB)-Power Delivery (PD) integrated circuit (IC) controller, the method comprising:
controlling, via a driver circuit of the USB-PD IC controller, operation of a buck-boost converter electrically coupled to a USB voltage bus power line;
controlling the driver circuit in a first mode, wherein changes in duty cycle are limited to a predetermined number of cycles in the first mode;
generating a sense signal proportional to current flowing in the USB voltage bus power line;
detecting, via an analog detection circuit, whether a slew rate of the sense signal exceeds a reference slew rate; and
overriding the limit placed on the changes in duty cycle in the first mode responsive to the analog detection circuit indicating that the slew rate of the sense signal exceeds the reference slew rate.