Systems and methods for adaptive input current limit control

A method, in an information handling system comprising a power system configured to provide electrical energy to information handling resources of the information handling system, the power system having a buck voltage regulator configured to receive a direct current input voltage from an alternating current adapter to generate a direct current main voltage, a battery for powering components of the information handling system, and a charger configured to charge the battery from the direct current main voltage, the method comprising:

• receiving from the buck voltage regulator an input current signal indicative of a first electrical current drawn by the buck voltage regulator from the alternating current adapter;
• performing a comparison of the input current signal to a maximum current rating of the alternating current adapter;
• and
• controlling a second electrical current drawn by the charger from the direct current main voltage based on the comparison.

An article of manufacture comprising:

• a non-transitory computer-readable medium;
• and
• computer-executable instructions carried on the computer-readable medium, the instructions executable on a processing device, the instructions, when read and executed, for causing the processing device to, in an information handling system comprising a power system configured to provide electrical energy to information handling resources of the information handling system, the power system having a buck voltage regulator configured to receive a direct current input voltage from an alternating current adapter to generate a direct current main voltage, a battery for powering components of the information handling system, and a charger configured to charge the battery from the direct current main voltage:
• receive from the buck voltage regulator an input current signal indicative of a first electrical current drawn by the buck voltage regulator from the alternating current adapter;
• perform a comparison of input current signal to a maximum current rating of the alternating current adapter;
• and
• control a second electrical current drawn by the charger from the direct current main voltage based on the comparison.