Overvoltage protection

Various embodiments of the disclosure relates to overvoltage protection. A power supply interface includes a first switch that couples an input terminal to an output terminal. A voltage dividing bridge is coupled to receive a supply potential. A comparator has a first input end connected to a first node of the bridge and a second input end configured to receive a constant potential. A digital-to-analog converter generates a control voltage that is selectively coupled by a second switch to a second node of the bridge. A circuit control controls actuation of the second switch based on an operating mode and generates a digital value input to the converter based on a negotiated set point of the supply potential applied to the input terminal. 本公开的各实施例涉及过压保护。供电接口包括将输入端子耦合到输出端子的第一开关。分压电桥被耦合以接收供电电位。比较器具有连接至电桥的第一节点的第一输入端、以及被配置为接收恒定电位的第二输入端。数模转换器生成控制电压，该控制电压通过第二开关选择性地耦合到电桥的第二节点。电路控制基于操作模式控制第二开关的致动并且基于施加到输入端子的供电电位的经协商的设定点来生成输入到转换器的数字值。