Soft-Start Switch Circuits for Synchronized Power Delivery
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Solution Overview
Problem
Current computer power delivery systems face challenges in synchronized turn-on and turn-off, meeting rise-time and rise-order requirements, monitoring power quality, and providing emergency shutdown, especially for high-power applications like gaming PCs and file servers, where the graphics adapter and hard drives require significant 12 V power, and existing solutions are not scalable or efficient.
Innovation Solution
A soft-start switch circuit integrated with a modular power delivery system that includes separated power supply paths, allowing for voltage ramping, power monitoring, and emergency shutdown, with the ability to upgrade power handling by adding soft-start switches and DC/DC converters, and the option to use a common power bank or battery power source for multiple systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional power delivery system is used, then the system structure is simple, but it cannot provide synchronized turn-on and turn-off, cannot meet rise-time requirements, and cannot monitor power quality
Solution Approach 1:
The power delivery system is divided into multiple independent power supply paths, each with its own soft-start switch circuit. This segmentation allows each path to be controlled independently for synchronized turn-on and turn-off, while maintaining overall system manageability through modular architecture.
Solution Approach 2:
A controller acts as an intermediary between the power supply paths and the load, coordinating the turn-on and turn-off sequences. The controller receives activation commands and distributes them to individual soft-start switch circuits, ensuring synchronized operation without requiring complex direct interconnections between all power paths.
2Power
If power is delivered to high-power components like graphics adapters and hard drives, then the power handling capability is sufficient, but load starvation occurs and system stability deteriorates
Solution Approach 1:
The soft-start switch circuits gradually ramp up voltage and current before full power delivery to high-power components. This preliminary action prevents sudden power surges that could cause load starvation in other parts of the system, ensuring stable operation during power-up and power-down transitions.
Solution Approach 2:
Power monitoring circuits continuously monitor voltage and current levels on each power supply path and provide feedback to the controller. This feedback mechanism allows the system to detect and respond to load conditions, preventing starvation by adjusting power distribution dynamically while maintaining overall system stability.
3Ease of operation
If separate power supply paths are implemented, then power delivery control is improved, but the device complexity and cost increase
Solution Approach 1:
The soft-start switch circuit is designed as a universal modular unit that can be replicated across multiple power supply paths. Each module performs the same functions (voltage ramping, power monitoring, controlled switching), simplifying design and reducing per-path complexity through standardization, while still providing enhanced power delivery control.
Solution Approach 2:
The system controls power delivery by changing parameters (voltage ramp rate, current limit, timing) rather than fundamentally altering the circuit topology. This allows flexible power delivery control across multiple paths while maintaining consistent, manageable circuit structures that can be easily replicated and configured.
Data Source
AI summary
There is provided a soft-start switch circuit working in conjunction with a pre-existing computer power delivery system or being an integral part of such a system, for power delivery to at least one component of a computer, comprising at least one separated power supply path. The soft-start switch circuit is configured to receive command/s to activate or deactivate power delivery to the at least one computer component, output a voltage ramped up to a fixed level to the at least one computer component on the at least one separated power supply path when the activation command is received, discontinue power delivery when the deactivation command is received, and receive and transmit a signal stating whether an adequate voltage and current level is received by the at least one computer component. A corresponding method is also provided.