Patent ID: 9641070
Date: 2017-05-02
CPC Classifications: G01R,H02M

Claim:
1. An integrated circuit, comprising: a current source coupled to a pin of the integrated circuit; a comparator having a first input coupled to the pin, a second input selectively coupled to a first threshold voltage or to a second threshold voltage, and an output at which a comparator output signal is provided; and a controller responsive to the comparator output signal, the controller having an output coupled to the current source to provide an enable signal to the current source and the controller configured to provide an open pin signal indicative of an open condition at the pin, wherein when the enable signal is at a first level, the first threshold voltage is coupled to the first comparator input and the current source is enabled, and when the enable signal is at a second level, the second threshold voltage is coupled to the first comparator input and the current source is disabled.