Power Control Module Backup Voltage Regulation During Faults
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Solution Overview
Problem
Existing power control systems for data storage devices, such as HDDs and SSHDs, face challenges in maintaining power integrity during interruptions, particularly in ensuring that user data is protected by providing backup power to complete ongoing writes to the disk without data loss.
Innovation Solution
A power control module with control circuitry that detects power faults, isolates supply lines, provides backup voltage through a bypass circuit, and regulates it using protection circuits to maintain output voltages within specified ranges, utilizing a backup power source like a spindle motor to ensure continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a backup power source is used to provide power during interruptions, then data protection is improved, but the complexity of the power control system increases
Solution Approach 1:
A bypass circuit is introduced as an intermediary component that directly connects the backup power source to the LV port when power faults are detected. This bypass circuit simplifies the overall power control architecture by providing a direct power path during fault conditions, avoiding the need for complex control logic while ensuring data protection through continuous power supply to critical components.
2Speed
If backup voltage is provided through a bypass circuit, then power delivery speed is improved, but voltage regulation precision may deteriorate
Solution Approach 1:
The power control system is segmented into two distinct paths: a bypass circuit for rapid power delivery during fault conditions and a regulated power path for normal operation. The bypass circuit provides immediate power delivery speed improvement by directly connecting the backup source to the LV port, while the regulated path maintains voltage precision through dedicated regulation circuitry. This segmentation allows both speed and precision requirements to be met in their respective operational contexts.
3Stability of the object's composition
If the LV protection circuit regulates backup voltage, then voltage stability is improved, but the response time during power faults increases
Solution Approach 1:
The system dynamically switches between two operational modes: during normal operation, the LV protection circuit regulates voltage to maintain stability; during power faults, the bypass circuit is activated to provide immediate power delivery. This dynamic switching mechanism allows the system to optimize for voltage stability during normal conditions while minimizing response time during fault conditions, effectively resolving the contradiction between stability and response time.
Data Source
AI summary
A power control module comprising low voltage (LV) port for receiving low supply voltage via LV supply line, high voltage (HV) input port for receiving high supply voltage via HV supply line, wherein high supply voltage is higher than low supply voltage, LV output port for providing low output voltage, HV output port for providing high output voltage, LV node coupled to LV input port, HV node coupled to HV input port, bypass circuit coupled between LV and HV nodes, LV protection circuit coupled between LV node and LV output port, and control circuitry configured to detect power fault on either LV or HV supply line, isolate the LV and HV nodes from LV and HV supply lines, provide backup voltage to LV node, and cause LV protection circuit to regulate backup voltage at LV node to maintain low output voltage at LV output port to within predetermined operating range.