Multi-Die PPM Circuits for Concurrent Peak Power Control
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Solution Overview
Problem
Current NAND storage systems face limitations in peak power management, as only a limited number of peak power operations can be performed simultaneously, leading to inefficient power utilization and increased system loading due to staggered operations and coordination between memory dies.
Innovation Solution
A peak power management (PPM) system is introduced, featuring PPM circuits on each memory die with pull-up and pull-down drivers, PPM contact pads, and a comparator to manage peak power operations based on electric potential, allowing multiple peak power operations to be performed simultaneously by coordinating power distribution across multiple memory dies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple peak power operations are performed simultaneously on multiple memory dies, then power utilization efficiency is improved, but system current control complexity increases
Solution Approach 1:
The system divides the memory storage system into multiple independent memory dies, each with its own PPM circuit. This segmentation allows each die to independently manage its peak power operations while contributing to the overall system power budget, thereby improving power utilization efficiency without requiring centralized control of all operations.
Solution Approach 2:
The PPM contact pad creates a shared electrical connection that provides feedback about the system's current state. By monitoring the voltage level at this shared node, each memory die can sense the aggregate current consumption and adjust its operations accordingly, enabling automatic current control without complex external management.
2Reliability
If peak power operations are staggered between memory dies, then current budget is controlled, but power utilization efficiency deteriorates
Solution Approach 1:
Each memory die is equipped with a PPM circuit that autonomously manages its peak power operations based on the shared contact pad voltage feedback. The die automatically adjusts its operation timing and power consumption without requiring external staggered scheduling, thereby maintaining current budget control while improving power utilization efficiency through simultaneous operations.
3Adaptability or versatility
If PPM circuits are implemented on each memory die with shared contact pad, then coordination between multiple dies is achieved, but circuit complexity increases
Solution Approach 1:
The PPM contact pad serves multiple functions simultaneously: it acts as a communication channel between dies, a feedback sensor for current monitoring, and a control signal distribution medium. This multi-functionality enables coordination between multiple memory dies while minimizing the additional circuitry required, as the same physical connection performs multiple roles.
4Reliability
If only one peak power operation is performed at a time, then current limit is respected, but system throughput decreases
Solution Approach 1:
The system dynamically adjusts the number of simultaneous peak power operations based on real-time current conditions. By monitoring the voltage at the shared PPM contact pad, the system can automatically determine when additional operations can be initiated without exceeding current limits, thereby maintaining compliance while maximizing throughput through flexible, adaptive operation scheduling.
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 PPM system enables efficient utilization of the storage system's power budget by allowing multiple peak power operations concurrently, optimizing power management and reducing unnecessary over-management, thereby enhancing the performance of high-density storage systems like 3D NAND storage systems.
Implementation Method 1
Each PPM circuit includes a pull-up driver electrically connected to a power source and a PPM resistor; a pull-down driver electrically connected to the PPM resistor
Implementation Method 2
the PPM system further includes a comparator with a first input terminal electrically connected to the PPM contact pads of the multiple memory dies and a second input terminal electrically connected to a reference voltage
Data Source
AI summary
A system includes multiple memory dies. Each of the memory dies includes a PPM circuit including a first pull driver, a second pull driver, and a PPM contact pad connected between the first pull driver and the second pull driver. The PPM contact pads of the multiple memory dies are electrically connected with each other. The PPM circuits of the multiple memory dies are configured to manage peak power operations according 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 circuit. Each of the second pull currents is proportional to a current level of a corresponding memory die.