Hot Plug Control Latch for Main Board Fault Power Isolation
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Solution Overview
Problem
Conventional computer systems do not adequately prevent further damage to a main board after an abnormal phenomenon occurs, as the power is re-supplied before thorough analysis and troubleshooting can be completed, potentially causing more harm.
Innovation Solution
A hot plug control signal generator with a controller and latch that sets and latches a hot plug control signal to a disabled state when an abnormal phenomenon is detected, ensuring the power switch remains disconnected until the fault is resolved, using an independent operation power to maintain the latch state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hot swap controller disconnects the power switch to prevent power from entering the main board when an abnormal phenomenon occurs, then the safety of the main board is improved, but the power supply is interrupted and cannot be automatically restored
Solution Approach 1:
The latch circuit is pre-configured to maintain the disconnected state of the power switch after an abnormal phenomenon occurs. When the hot swap controller detects an anomaly, it triggers the latch circuit to set the hot plug control signal to a disabled state, which then latches this state automatically. This preliminary action ensures that before engineers complete effective analysis and troubleshooting, the main board cannot be accidentally powered on again, preventing further damage.
Solution Approach 2:
The latch circuit acts as an intermediary between the hot swap controller and the power supply system. It receives the control signal from the hot swap controller and translates it into a latched state that maintains the power disconnect condition. The latch circuit includes a set input端 that receives the control signal and an output端 that generates the latched hot plug control signal, serving as a buffer that prevents direct re-powering until the fault is resolved.
2Ease of operation
If the server supplies power to the main board again after a tray is re-plugged, then the ease of operation is improved, but the risk of causing more serious damage to the main board increases
Solution Approach 1:
The latch circuit implements preliminary anti-action by pre-preventing the power supply from being restored to the main board after an abnormal phenomenon. Even though the tray can be physically re-plugged and the server attempts to supply power, the latched hot plug control signal maintains the power switch in a disconnected state. This preliminary protective action counteracts the potential harmful effect of accidental re-powering before the fault is properly diagnosed and resolved.
Data Source
AI summary
A main board, a hot plug control signal generator, and a control signal generating method thereof are provided. The hot plug control signal generator includes a controller and a latch. The controller provides a control signal. The latch is operated based on an operation power to generate a hot plug control signal. The latch sets the hot plug control signal to a disabled first logic value, and latches the hot plug control signal at the first logic value.