Variable Output Power Delivery Device with AC Coupled Feedback Control
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Solution Overview
Problem
Existing Power Delivery (PD) devices and AC adapters lack the ability to control variable output voltage values and available output current capacities effectively, and they do not have adequate protection functions to adapt to different target equipment requirements.
Innovation Solution
A PD device with a DC/DC converter and primary/secondary-side controllers that use AC coupling and insulation circuits to feedback electric power information, allowing the primary-side controller to adjust the output voltage and current based on target equipment needs, thereby implementing power changes and protection functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed output voltage and current capacity are used in the PD device, then the device structure is simple, but the device cannot adapt to different target equipment requirements
Solution Approach 1:
The patent implements dynamic control of output voltage and current capacity by using primary-side and secondary-side controllers that can adjust power delivery parameters based on feedback from connected equipment. The system transitions from fixed to variable output characteristics, enabling adaptation to different device requirements while maintaining a relatively simple overall structure through controlled adjustability.
Solution Approach 2:
The patent employs feedback mechanisms where the secondary-side controller detects equipment requirements and communicates them to the primary-side controller, which then adjusts the output voltage and current capacity accordingly. This feedback loop enables the system to adapt to different target equipment without requiring complex manual configuration or multiple fixed-output devices.
2Reliability
If overcurrent protection is implemented with a fixed threshold, then the protection function is simple, but it cannot protect different types of equipment with different current requirements
Solution Approach 1:
The patent implements dynamic overcurrent protection by setting the protection threshold based on the actual equipment requirements detected through the feedback mechanism. Instead of using a fixed protection threshold, the system adjusts the current limit dynamically to match the connected equipment's specifications, providing effective protection while avoiding unnecessary restrictions on power delivery.
Solution Approach 2:
The patent changes the protection threshold parameter from a fixed value to a variable value that depends on the connected equipment characteristics. The primary-side controller modifies the protection threshold parameter based on information received from the secondary-side controller, enabling the protection function to adapt to different equipment types without increasing overall system complexity.
3Adaptability or versatility
If variable output voltage and current capacity are implemented, then the device can adapt to different equipment, but the control system becomes more complex
Solution Approach 1:
The patent divides the control system into two separate controllers: a primary-side controller and a secondary-side controller. This segmentation allows each controller to have specialized functions - the secondary-side controller handles equipment detection and communication, while the primary-side controller handles power delivery adjustment. This division reduces the complexity burden on any single controller while enabling comprehensive variable power delivery capability.
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
Enables the PD device, AC adapter, and electronic apparatus to control variable output voltage and current capacities, ensuring safe and efficient power delivery while protecting against overcurrent and overvoltage conditions.
Implementation Method 1
a secondary-side controller connected with AC coupling to the output, the secondary-side controller configured to feed back electric power information of the output to the primary-side controller
Data Source
AI summary
The PD device comprises a primary-side controller configured to control an input current of a DC/DC converter disposed between an input and an output, and a secondary-side controller connected with AC coupling to the output, and configured to feed back electric power information of the output to the primary-side controller. The primary-side controller varies an output voltage value and an available output current capacity of the DC/DC converter by controlling the input current on the basis of the electric power information fed back from the secondary-side controller. The primary-side controller can change an overpower detecting set value in accordance with the target equipments connected to the output, thereby executing the power change of the DC/DC converter.