Memory Die Peak Power Coordination Under Current Budget Limits
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Solution Overview
Problem
Existing NAND storage systems face limitations in performing multiple peak power operations simultaneously due to power constraints, leading to inefficient power management and increased system loading.
Innovation Solution
A peak power management (PPM) system with PPM circuits on each memory die, including pull-up and pull-down drivers, PPM contact pads, and a comparator, which coordinates power operations across multiple memory dies through die-to-die connections, using a PPM enablement signal to manage power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If peak power operations are staggered between multiple memory dies, then power consumption is controlled within the current budget, but the number of simultaneous operations is limited and system loading increases
Solution Approach 1:
The patent implements dynamic peak power management by allowing the number of simultaneous peak power operations to vary based on real-time power availability. The system dynamically adjusts operation concurrency by monitoring power consumption and enabling multiple operations when power headroom exists, rather than enforcing a fixed limit. This resolves the contradiction by making the system adaptive - controlling power when needed while maximizing throughput when power is available.
Solution Approach 2:
The system changes the operational parameters of memory dies based on power conditions. When power consumption is below the current budget, the system allows more dies to perform peak power operations simultaneously. When the budget is approached, it dynamically reduces the number of concurrent operations. This parameter-based control enables the system to optimize both power usage and productivity based on real-time conditions.
2Use of energy by stationary object
If coordination between memory dies is implemented to manage peak power operations, then power consumption is optimized, but communication overhead and system complexity increase
Solution Approach 1:
The patent merges the peak power management functions of multiple memory dies into a coordinated system. Instead of each die operating independently or requiring extensive point-to-point communication, the system combines their operations under a unified power management framework. The memory controller aggregates power consumption information from multiple dies and makes centralized coordination decisions, reducing overall communication overhead while achieving power optimization.
Solution Approach 2:
The peak power management mechanism is designed as a universal solution that can coordinate operations across any number of memory dies with different power characteristics. The same coordination protocol and power management logic apply regardless of the number or type of dies involved, making the system scalable and reducing the need for die-specific communication channels or specialized handling.
3Use of energy by stationary object
If only one peak power operation is performed at a time, then power consumption is controlled, but system throughput and productivity are reduced
Solution Approach 1:
The system transitions from static single-operation sequencing to dynamic multi-operation parallelism. The number of simultaneous peak power operations is no longer fixed at one but dynamically adjusted based on real-time power availability, die readiness, and operation priorities. This enables the system to perform multiple operations in parallel when power budget allows, significantly improving throughput while maintaining power control.
Solution Approach 2:
The patent ensures continuous productive operation by keeping multiple memory dies ready to perform peak power operations simultaneously. Instead of sequential execution where dies wait their turn, the system maintains multiple active operation streams that can proceed in parallel when power is available, eliminating idle time and maximizing the continuity of useful work across the memory subsystem.
Data Source
AI summary
A system includes multiple memory dies. Each of the memory dies includes a peak power management (PPM) circuit including a first pull driver, a second pull driver, and a PPM contact node connected between the first pull driver and the second pull driver. PPM contact nodes of the multiple memory dies are connected with each other. A number of peak power operations performed by the multiple memory dies is related to a first pull current flowing through a certain first pull driver of a certain PPM circuit. The first pull current is a sum of second pull currents flowing through second pull drivers of the PPM circuits. Each of the second pull currents is proportional to a current level of a corresponding memory die.