Dell Products Inc.

Daniel B Little

Keith James Kasprzak

A method is provided for providing indirect voltage detection in a power supply of an IHS. The method may include providing output current and voltage to an IHS via a power cable and monitoring the output current within the power supply. Furthermore, the method may include adjusting the output voltage if the output current reaches a threshold value.

Methods and systems for providing indirect voltage detection in a power supply

An AC-to-DC adapter provides power to information handling systems at different power levels based on the power rating of the information handling system. An adapter manager sets a first lower level at an over current protection circuit unless the information handling system sends identification information that indicates the information handling system is rated to accept a second higher power level, such as by sending a low signal pulse through a serial communication line. While the identification information is present and external power is applied to the adapter, the adapter manager sets a second higher level at an over current protection circuit to allow output of a second higher power level.

System and method for adjusting information handling system over current protection with a common power cable

An AC-DC adapter is provided with an auto-sensing capability to sense when no DC load is present at the output (secondary side) of the adapter by monitoring for absence of load-indicative signals, such as power supply identifier (PSID) signals communicated to the adapter from a coupled DC-powered device. Upon detection of a no load condition, the adapter enters a no load mode during which the adapter output is turned off in order to reduce energy consumption by the adapter, and only produces short recurring voltage pulses (hiccups) at the adapter output. Upon detection of load-indicative signals communicated to the adapter from a coupled DC-powered device, the adapter output enters normal mode and provides its normal regulated power value to the adapter output for powering the coupled DC-powered device.

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Pflugerville, TX, United States of America

Daniel B Little