Overcurrent Protection Circuit for Hot-Plugging Servers
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Solution Overview
Problem
Frequent hot plugging operations in computer systems can cause large input currents, leading to malfunction or permanent damage of system components, resulting in decreased performance and potential data loss.
Innovation Solution
An overcurrent protection circuit is implemented between the power supply module and the system load on a mainboard, featuring a detecting component, detection unit, comparing unit, and power switch to actively detect excessive currents and disconnect power supply when necessary, preventing damage from overcurrent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hot plugging operations are supported to satisfy maintenance and upgrade requirements, then system adaptability is improved, but input current increases causing component damage and system reliability deteriorates
Solution Approach 1:
The overcurrent protection circuit performs preliminary detection of input current before the current can damage system components. The detecting component continuously monitors the input current, and when excessive current is detected during hot plugging operations, the power switch is proactively disconnected to prevent component damage, thus maintaining system reliability while supporting hot plugging capability
Solution Approach 2:
The overcurrent protection circuit acts as an intermediary component between the power supply module and the system load. It includes a detecting component that monitors input current, a comparing unit that compares detected voltage with reference voltage, and a power switch that controls power delivery. This intermediary structure enables hot plugging operations while protecting against excessive current that would otherwise damage components
2Reliability
If overcurrent protection circuit is added to detect and disconnect excessive current, then system reliability is improved, but device complexity increases
Solution Approach 1:
The overcurrent protection circuit integrates multiple functions into a single compact module: the detecting component monitors input current, the detection unit converts current to detectable voltage, the comparing unit compares with reference voltage, and the power switch executes protection. This multi-functional integration achieves reliable overcurrent protection while minimizing the increase in 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
The overcurrent protection circuit effectively prevents system load damage by disconnecting power during excessive current conditions, ensuring system reliability and maintaining performance by preventing overcurrent issues.
Implementation Method 1
a detecting component... for detecting a detecting voltage generated by the detecting component responsive to a supplying current outputted from the power supply module
Implementation Method 2
The comparing unit is coupled to the detection unit and is configured to compare the detecting voltage with a reference voltage to generate a control voltage
Data Source
AI summary
An overcurrent protection circuit and a server using the same are provided. The overcurrent protection circuit coupled between a power supply module and a load on a mainboard including a detecting component, a detection unit, a comparing unit, and a power switch. The detecting component is coupled between the power supply module and the detection unit. The detection unit detects a detecting voltage generated by the detecting component responsive to a supplying current. The comparing unit generates a control voltage according to the detecting voltage and a reference voltage. The power switch is coupled between the detecting component and the load and is controlled by the control voltage. When the comparing unit determines that the detecting voltage is greater than the reference voltage, the comparing unit cuts off the power switch to disconnect a power supply path between the power supply module and the load.