Power Management Circuit for Verified Module Power Cutoff
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Solution Overview
Problem
The increasing complexity of power supply management in advanced electronic devices, such as computers and smartphones, necessitates improved methods for efficiently managing power supply to various modules and circuits, particularly in enabling and disabling functionalities to conserve energy.
Innovation Solution
A power management circuit comprising a first state machine to verify the duration of a disable command and a second state machine to cut off power to specific module portions, ensuring reliable power supply voltage from a battery while allowing auxiliary functionalities to remain operational during disabled modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If power supply is cut off to a module when disabling, then energy consumption is reduced, but accidental or brief disable commands may cause unintended power loss
Solution Approach 1:
The first state machine verifies that the disable command remains stable for a predetermined time period before the second state machine cuts off power. This preliminary verification action prevents accidental or brief disable commands from causing unintended power loss, while still enabling energy savings when legitimate disable commands are issued.
2Reliability
If power supply management includes multiple state machines and verification steps, then reliability of power control is improved, but device complexity increases
Solution Approach 1:
The power management circuit is divided into two distinct state machines: a first state machine that verifies command stability and a second state machine that executes power cutoff. This segmentation allows each component to have a specific, simplified function, improving reliability through separation of concerns while keeping individual components manageable in complexity.
Data Source
AI summary
In accordance with an embodiment, a circuit for managing a power supply of an electronic module includes: a first state machine configured to receive a first command for disabling the module, and to verify that the first command remains the same for a first minimum time period; and a second state machine configured to cut off a power supply of a first portion of the module when the second state machine receives a second command from the first state machine indicating that the first command has remained the same for the first minimum time period. The first portion of the module is configured to is configured to be powered from a battery via a first power supply voltage.