Patent ID: 11863186
Assignee: INFINEON TECHNOLOGIES AG
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A driver circuit configured to control a power switch, the driver circuit comprising:
an input pin configured to receive pulse modulation (PM) control signals from a processor;
an output pin galvanically isolated from the input pin, wherein the driver circuit is configured to deliver PM drive signals from the output pin to the power switch to control ON/OFF switching of the power switch;
a first register configured to store counts of the PM drive signals, wherein the counts of the PM drive signals count a number of rising and/or falling edges of the PM drive signals; and
a second register configured to store counts of the PM control signals, wherein the counts of the PM control signals count a number of rising and/or falling edges of the PM control signals,
wherein PM signaling in the driver circuit is OK when there is no mismatch between the stored counts in the first register relative to the stored counts in second register, and
wherein a PM signaling problem exists in the driver circuit when there is mismatch between the stored counts in the first register relative to the stored counts in second register.