Memory Module PMIC Power Mode Switching
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Solution Overview
Problem
Existing memory module power-management systems are inefficient in optimizing power usage, particularly when dealing with varying supply voltages, leading to increased power consumption and heat loss.
Innovation Solution
A power-management integrated circuit (PMIC) with a DC-DC converter and switchable FET banks that selectively use high and low supply voltages to optimize power modes, reducing power consumption by disabling unnecessary components when lower supply voltages are available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the PMIC uses high supply voltage for power conversion, then the power conversion capability is maintained, but the power consumption increases
Solution Approach 1:
The PMIC dynamically switches between different power conversion paths based on operating conditions. When high supply voltage is available, it can selectively enable high-voltage power conversion circuits to maintain power delivery capability while keeping overall power consumption low by using efficient low-voltage paths when appropriate.
Solution Approach 2:
The system changes operational parameters by selecting different power conversion modes (high-voltage vs. low-voltage paths) based on supply voltage conditions. This allows the PMIC to optimize the balance between power conversion capability and power consumption by adjusting which conversion path is active.
2Use of energy by moving object
If the PMIC disables unnecessary components to reduce power consumption, then the power usage is optimized, but the device complexity increases
Solution Approach 1:
The power conversion system is segmented into multiple independent paths: a high-voltage power conversion path and a low-voltage power conversion path. This segmentation allows the PMIC to selectively activate only the necessary path based on supply voltage conditions, reducing power consumption while managing complexity through modular design.
Solution Approach 2:
The PMIC is designed with multi-functional power conversion capability, where a single device can operate in multiple modes (high-voltage mode and low-voltage mode) depending on supply conditions. This universality allows the system to adapt to different operating scenarios without requiring separate dedicated circuits for each mode.
3Use of energy by moving object
If the PMIC uses low supply voltage for power management, then the power consumption is reduced, but the power delivery capability is limited
Solution Approach 1:
The PMIC dynamically adapts its power delivery capability based on available supply voltage. When low supply voltage is available, it operates in low-power mode with reduced but sufficient delivery capability. When high supply voltage becomes available, it can switch to high-power mode to provide full delivery capability, making the system's power delivery dynamically matched to supply conditions.
Solution Approach 2:
The system changes its operational parameters by switching between low-voltage and high-voltage power conversion paths. This allows the PMIC to adjust power delivery capability to match supply voltage conditions, ensuring efficient operation at low voltage while maintaining the ability to provide high power delivery when needed.
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 PMIC achieves a significant reduction in power usage by efficiently switching between power modes based on available supply voltages, minimizing power loss and consumption, especially when only a high supply voltage is present.
Implementation Method 1
A power-management integrated circuit (PMIC) with a DC-DC converter
Data Source
AI summary
A power-management integrated circuit (PMIC) is installed on a memory module to optimize power use among a collection of memory devices. The PMIC includes external power-supply nodes that receive relatively high and low supply voltages. Depending on availability, the PMIC uses one or both of these supply voltages to generate a managed supply voltage for powering the memory devices. The PMIC selects between operational modes for improved efficiency in dependence upon the availability of one or both externally provided supply voltages.