Dynamic Power Switch Controller for Latency and Leakage Trade-offs
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Solution Overview
Problem
Existing power switch control systems face challenges in optimizing power-up and power-down latency across different performance modes, leading to suboptimal energy efficiency and performance due to fixed configurations that do not adapt to varying performance states.
Innovation Solution
The implementation of a power switch controller that dynamically configures the enablement of multiple power chains based on performance modes, allowing sequential or parallel enablement of power chains depending on the select signal, thereby optimizing power-up and power-down processes for different performance states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If power chains are enabled in parallel for fast power-up, then power-up latency is reduced, but power leakage increases during low-performance modes
Solution Approach 1:
The power switch controller dynamically adjusts the enablement strategy of power chains based on performance mode. In low-performance modes, power chains are enabled sequentially to minimize power leakage, while in high-performance modes, they are enabled in parallel to reduce power-up latency. This dynamic adaptation resolves the contradiction by making the system flexible rather than fixed.
Solution Approach 2:
The system changes the operational parameters of power chain enablement based on performance mode requirements. The select signal modifies the timing and sequence parameters of power switch activation, transitioning between sequential and parallel enablement strategies to optimize the trade-off between power-up latency and power leakage.
2Loss of energy
If power chains are enabled sequentially to reduce power leakage, then energy efficiency improves, but power-up latency increases
Solution Approach 1:
The power switch controller dynamically selects between sequential and parallel power chain enablement based on performance mode. When high performance is required, the system switches to parallel enablement to reduce power-up latency, while maintaining sequential enablement for low-performance modes to minimize power leakage.
Solution Approach 2:
The system modifies the enablement timing parameters of power chains according to performance mode. The select signal controls whether power chains are activated with time delays (sequential) or simultaneously (parallel), allowing parameter adjustment to resolve the contradiction between energy efficiency and speed.
3Device complexity
If a fixed power chain configuration is used, then device complexity is reduced, but adaptability to different performance modes deteriorates
Solution Approach 1:
The power switch controller is designed with multi-functionality to handle both sequential and parallel power chain enablement strategies. By incorporating a select signal and control logic that can interpret different performance mode requirements, the controller becomes universal, adapting to various operational conditions without requiring separate dedicated circuits for each mode.
Solution Approach 2:
The system introduces dynamic control capabilities through the power switch controller, which adjusts its behavior based on the select signal indicating different performance modes. This dynamic adaptation allows the system to maintain low complexity while achieving high adaptability, as the same hardware structure flexibly responds to different operational requirements.
Data Source
AI summary
In certain aspects, an apparatus includes a first power chain, a second power chain, and an enable circuit having an output coupled to an input of the first power chain. The apparatus also includes a multiplexer having a first input coupled to an output of the first power chain, a second input coupled to the output of the enable circuit, and an output coupled to an input of the second power chain, wherein the multiplexer is configured to receive a select signal, and couple the first input or the second input to the output of the multiplexer based on the select signal.