Integrated circuit comprising voltage modulation circuitry and method threfor

摘要

An integrated circuit comprising voltage modulation circuitry arranged to convert an input voltage level at an input node to an output voltage level at an output node. The voltage modulation circuitry comprises a switching element arranged to connect the input node to the output node when in an ON condition, and switching control module operably coupled to the switching element and arranged to control the connection of the input node to the output node by the switching element in accordance with a switching frequency. The voltage modulation circuitry further comprises frequency control module operably coupled to the switching control module and arranged to receive an indication of the input voltage level at the input node, and to configure the switching frequency based at least partly on the input voltage level indication.

主权项

1. An integrated circuit comprising:
a voltage modulation circuitry arranged to convert an input voltage level at an input node to an output voltage level at an output node, the voltage modulation circuitry comprising
a switching element arranged to connect the input node to the output node when the switching element is in an ‘ON’ condition,a switching control module operably coupled to the switching element and arranged to control a connection of the input node to the output node by the switching element in accordance with a switching frequency, anda frequency control module operably coupled to the switching control module and arranged to
receive a load current indication,receive an input voltage level indication of the input voltage level at the input node,combine the load current indication and the input voltage level indication to generate an input power reference value,determine a first switching frequency value by comparing the input power reference value to a first threshold value,configure a first switching frequency for the switching element based on the first switching frequency value,determine a second switching frequency value by comparing the input power reference value to a second threshold value,configure a second switching frequency for the switching element based on the second switching frequency value, andchange the switching frequency from the first switching frequency to the second switching frequency based on the input power reference value.