Single-Wire Bus Power Control for High-Current Slave Operations
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Solution Overview
Problem
Conventional single-wire interface systems face challenges in providing sufficient power to slave devices, especially during high-current operations due to insufficient voltage and increased current demand, which can lead to voltage drops and reduced operational margins.
Innovation Solution
A controller is implemented to adaptively control the power at the single-wire interface by managing the electrical behavior of the charging path, allowing current to be provided during high-current operations and reducing voltage drops through the use of field-effect transistors and capacitors, ensuring sufficient power is available for slave devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional single-wire interface systems are used, then the structure is simple, but insufficient power is provided to slave devices during high-current operations
Solution Approach 1:
The controller dynamically adjusts the charging path electrical behavior based on operation type. During high-current operations, the controller modifies the charging path to provide additional current to the slave device, transitioning from a static power delivery system to a dynamic one that adapts to power demands.
Solution Approach 2:
The controller receives and processes operation type information in advance before the high-current operation executes. This allows the controller to prepare and adjust the charging path electrical behavior proactively, ensuring sufficient power is available when needed without reacting too late.
2Reliability
If conventional single-wire interface systems are used, then the fabrication process is simple, but voltage drops occur during high-current operations
Solution Approach 1:
The controller acts as an intermediary between the power source and the slave device, managing the charging path electrical behavior to reduce voltage drops. By inserting this control layer, the system can actively compensate for voltage drops during high-current operations without fundamentally changing the single-wire interface structure.
Solution Approach 2:
The controller changes electrical parameters of the charging path based on operation type. During high-current operations, it adjusts current delivery parameters to maintain adequate voltage levels at the slave device, preventing voltage drops that would compromise operational reliability.
3Power
If additional power sources are added to single-wire interface, then sufficient power is provided, but device complexity increases
Solution Approach 1:
The controller performs multiple functions: it manages data communication, controls the charging path electrical behavior, and provides adaptive power delivery. By making the controller multi-functional, the patent avoids adding separate dedicated power management components, thus maintaining simplicity while ensuring sufficient power availability.
Solution Approach 2:
The patent combines power management functionality with the existing controller, merging what could have been separate power control circuits into the unified controller architecture. This consolidation provides the needed power management capabilities without increasing overall device complexity.
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
This adaptive power control ensures reliable operation of slave devices during high-current tasks by reducing voltage drops and maintaining a higher operating margin, eliminating the need for additional power sources and simplifying the fabrication process.
Implementation Method 1
reducing voltage drops through the use of field-effect transistors and capacitors
Implementation Method 2
reducing voltage drops through the use of field-effect transistors and capacitors
Data Source
Figure 1
Figure 2~3A
Figure 3B~4
AI summary
According to various aspects, a controller (200) may be configured to: control a transmission (204) over a single-wire interface (202) of an instruction corresponding to a high-current operation; and control (206) an electrical behavior of a charging path to provide current at the single-wire interface (202) during a time period corresponding to an execution of the instructed high-current operation.