PSU Current Share Bus Scaling for Total Load Current Sensing
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Solution Overview
Problem
Existing power management systems struggle with efficiently determining and managing the total load current provided by multiple redundant power supply units, leading to inefficiencies and increased costs due to the reliance on resistor-based measurements and complex hardware configurations.
Innovation Solution
A system and method for generating power delivery information using a current share bus to determine the total load current by amplifying signals from multiple power supply units, utilizing scaler and transconductance amplifier circuits to efficiently manage power distribution among compliant units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If resistor-based measurements are used to determine total load current from multiple PSUs, then measurement can be achieved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple PSU current signals into a single total load current signal by summing the individual current contributions from each PSU. This merging approach eliminates the need for separate resistor-based measurement circuits for each PSU, reducing hardware complexity while maintaining measurement accuracy.
Solution Approach 2:
The current share bus serves multiple functions: it distributes target current information from the primary PSU to secondary PSUs, collects compliance status information, and simultaneously provides the basis for determining total load current. This multi-functionality eliminates the need for dedicated measurement hardware.
2Reliability
If redundant power supply units are provided to ensure uninterrupted power supply, then reliability improves, but device complexity and cost increase
Solution Approach 1:
The redundant PSU system automatically manages itself through the current share bus, where the primary PSU automatically communicates target current levels and compliance status to secondary PSUs. The system self-regulates current distribution and failover without external control, reducing management complexity while maintaining reliability.
Solution Approach 2:
The system implements feedback through compliance status signals sent from each PSU to the current share bus. This feedback mechanism allows automatic detection of PSU failures and triggers appropriate current redistribution, ensuring uninterrupted power supply while simplifying fault management.
3Measurement precision
If scaler and transconductance amplifier circuits are used to amplify current signals, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The patent replaces direct physical current measurement with electrical signal processing. Instead of using physical resistors to convert current to voltage for measurement, the system uses scaler and transconductance amplifier circuits to process current signals electrically, achieving accurate measurement while reducing the need for precision passive components.
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 approach allows for more efficient power management by accurately determining the total load current, reducing space and cost requirements while improving the reliability and efficiency of power delivery in systems with multiple power supply units.
Implementation Method 1
first circuitry to perform an amplification based on the scale factor
Data Source
AI summary
Techniques and mechanisms for providing power telemetry information which indicates a total load current from one or more power supply units (PSUs). In an embodiment, a device is coupled to receive a first signal from the current share bus which is coupled to each of multiple PSUs. A voltage level of the first signal represents a target amount of current to be output by each of the one or more PSUs. A second signal is generated based on both the first signal, and on an indication of a scale according to which a primary PSU of the one or more PSUs represents a target amount of current. In another embodiment, an amplification is performed, based on the second signal and on a total number of the one or more PSUs, to generate an Isys signal which indicates a total load current output by the one or more PSUs.