Multimode USB-C Adapter Power Negotiation
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Solution Overview
Problem
Portable Information Handling Systems (IHSs) face challenges in meeting varying power demands due to limitations in existing USB-C power adapters, which restrict power transmission to less than 100 watts, failing to support high-power requirements of devices like laptops with multi-core processors and integrated displays.
Innovation Solution
A multimode AC adapter that supports both USB-PD and high-power transmissions up to 60 volts, using a high-efficiency power circuit with digital voltage dividers to convert input voltage to suitable levels for IHS operation, enabling power delivery exceeding 200 watts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If USB-C power adapters are used for portable IHSs, then the adapters can be thin and portable, but the power transmission is limited to less than 100 watts
Solution Approach 1:
The power adapter is designed to support multiple power transmission modes (USB-PD mode and high-power mode) through a single USB-C interface, enabling it to function both as a portable thin adapter and as a high-power adapter depending on the connected device's requirements. The adapter includes a USB-C connector that can negotiate and switch between different power delivery protocols.
Solution Approach 2:
The system dynamically changes power transmission parameters by switching between USB-PD protocol (limited to 100W) and a proprietary high-power protocol (capable of 60V/200W+). The adapter and device negotiate the appropriate mode based on device capability, allowing the same physical adapter to deliver different power levels without changing its physical form factor.
2Power
If high-power transmissions are implemented, then power demand of portable IHSs can be met, but heat dissipation and efficiency challenges arise
Solution Approach 1:
The patent replaces traditional analog power conversion mechanisms with digital voltage dividers and digital control systems. This substitution enables more precise control of power conversion, reducing energy losses and heat generation. The digital voltage dividers provide accurate voltage regulation without the inefficiencies of traditional analog circuitry.
Solution Approach 2:
The system implements monitoring of power demand and dynamic configuration based on actual needs. The adapter monitors the device's power requirements and adjusts the power transmission mode accordingly, switching between USB-PD and high-power modes. This feedback mechanism prevents unnecessary high-power transmission when not needed, reducing heat dissipation.
3Adaptability or versatility
If adaptive power modes are implemented, then power demand variability can be addressed, but device complexity increases
Solution Approach 1:
The adapter incorporates multiple power delivery modes (USB-PD and proprietary high-power mode) within a single device, eliminating the need for multiple separate adapters. The USB-C connector and internal circuitry are designed to automatically negotiate and switch between modes based on device capability, providing versatility without requiring user intervention or multiple components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively addresses the power demand variability of portable IHSs by providing adaptive power transmission modes, ensuring efficient operation and thin, portable adapter designs while managing heat dissipation and efficiency.
Implementation Method 1
The power circuit comprises a plurality of digital voltage dividers operable for converting the high-power transmission to the voltage used to power operations of the IHS
Data Source
AI summary
Systems and methods are provided for adaptively powering an Information Handling System (IHS) using a multimode AC adapter. Information reported by the multimode adapter is utilized to determine whether it supports USB-PD power transmissions and also supports high-power transmissions. The power demand of the IHS is monitored. When the power demand is greater than the USB-PD power levels, the multimode adapter is configured for providing a high-power transmission and a power circuit of the IHS is configured for converting the high-power transmission to a voltage used by the IHS. When the power demand is not greater than the USB-PD power levels, the multimode adapter is configured for providing a USB-PD transmission. Some embodiments may detect events associated with high power demand and may preemptively configure the power circuit of the IHS for providing high-power outputs upon detecting such events.