Selective Charger Control for Portable Systems
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Solution Overview
Problem
Conventional information handling systems experience power inefficiencies due to internal charger operations, leading to thermal stress and limited power transfer rates, as they convert AC power to DC and manage voltage levels within the device.
Innovation Solution
A system that selectively manages charger control, allowing power to bypass the internal charger if an external power source supports remote charger management, thereby eliminating internal boost and buck operations and directing power transfer directly to the system bus for faster charging and reduced thermal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If internal charger operations are used to convert AC power to DC and manage voltage levels, then power can be transferred to the system, but power inefficiencies and thermal stress occur
Solution Approach 1:
The patent extracts the charger control functionality from the information handling system and relocates it to an external power source. This allows the internal charger to be bypassed during power transfer, eliminating the AC-to-DC conversion and voltage level management steps within the system that cause power inefficiency and thermal stress, while still enabling power transfer from external sources
2Adaptability or versatility
If internal charger operations are used to manage voltage levels, then power can be adapted for internal use, but thermal stress increases within the system
Solution Approach 1:
The charger control logic is extracted from the information handling system and placed in the external power source. This relocation allows voltage adaptation to occur externally before power transfer, eliminating the thermal-generating buck and boost operations from the internal system while preserving the necessary voltage adaptation capability through external control
3Productivity
If external power source supports remote charger management, then power can bypass internal charger for faster charging, but internal charging capabilities are reduced
Solution Approach 1:
The system dynamically switches between two charging modes based on external power source capabilities: when an external source with remote charger management is detected, the system enters bypass mode for high-speed charging; when no such source is available, it automatically switches to internal charger mode for standard charging. This dynamic adaptation maintains charging flexibility while enabling faster charging when conditions permit
Solution Approach 2:
The information handling system autonomously detects the capabilities of connected power sources and automatically configures the appropriate charging path without user intervention. The system self-determines whether to bypass the internal charger or use it based on external source capabilities, maintaining operational versatility while optimizing charging speed
Data Source
AI summary
A portable information handling system selectively accepts power transferred from an external device through a port, such as USB Type C port, with one of a first or second power configuration. The first power configuration accepts power regulated by a charger of an external device and routed directly to a system bus and battery of the portable information handling system. The second power configuration accepts power regulated by an internal charger of the portable information handling system, such as a narrow voltage direct current charger.