Patent ID: 9728359
Date: 2017-08-08
CPC Classifications: G01R,G05F,H01H

Claim:
1. A diagnostic system for a voltage regulator, comprising: a microcontroller having first and second analog-to-digital converters and first and second output ports; a first analog multiplexer having an input port and an output port, the output port of the first analog multiplexer being electrically coupled to the first analog-to-digital converter; the input port of the first analog multiplexer being electrically coupled to the voltage regulator; a second analog multiplexer having an input port and an output port, the output port of the second analog multiplexer being electrically coupled to the second analog-to-digital converter; a voltage step-down circuit having an input node and an output node, the input node of the voltage step-down circuit being electrically coupled to the voltage regulator, the output node of the voltage step-down circuit being electrically coupled to the input port of the second analog multiplexer; the first analog multiplexer receiving a first voltage from the voltage regulator and outputting the first voltage to the first analog-to-digital converter; the first analog-to-digital converter outputting a first voltage value corresponding to the first voltage from the voltage regulator; and the microcontroller being programmed to execute a first diagnostic function to set a first voltage regulator diagnostic flag equal to a fault value indicating a voltage out of range condition, if the first voltage value is greater than a first threshold voltage value or the first voltage value is less than a second threshold voltage value.