Semiconductor Integrated Circuit Feedback Loop Power Control
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Solution Overview
Problem
Digitally controlled semiconductor integrated circuits require high power consumption for AD converter operations, necessitating a technique to enhance conversion efficiency.
Innovation Solution
The semiconductor integrated circuit employs a feedback loop with two modes: one for digitalizing and feedbacking current voltage or load current, and another for feedbacking information as an analog value, allowing for power reduction by switching between normal and low power modes based on load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an AD converter is used to digitalize and control output voltage or output current in a digitally controlled semiconductor integrated circuit, then control precision and noise immunity are improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic switching between two feedback modes: a first feedback mode using an AD converter for digital feedback when high precision is required, and a second feedback mode using an analog feedback path when power consumption needs to be reduced. The control circuit dynamically selects the appropriate feedback mode based on operating conditions, thereby resolving the contradiction between measurement precision and power consumption.
Solution Approach 2:
The patent changes the feedback signal parameter from digital (requiring AD converter) to analog (bypassing AD converter) based on operational requirements. By adjusting the feedback mode parameter between digital and analog states, the system achieves both high precision control when needed and low power consumption when possible, eliminating the need for continuous high-power AD converter operation.
2Reliability
If the AD converter operates continuously to maintain precise digital control, then control accuracy is maintained, but power consumption increases during low load conditions
Solution Approach 1:
The patent applies partial action by using the AD converter only when necessary for maintaining control accuracy, rather than continuously. During low load conditions where full digital precision is not required, the system switches to the analog feedback mode, performing only the essential control function with reduced power consumption. This partial use of the AD converter resolves the contradiction between maintaining reliability and reducing energy usage.
Solution Approach 2:
The system periodically switches between digital feedback mode (using AD converter) and analog feedback mode based on load conditions. During high load or transient conditions, digital feedback is activated for precise control; during steady-state low load conditions, analog feedback takes over to reduce power consumption. This periodic switching strategy maintains control accuracy when needed while minimizing power consumption during normal operation.
Data Source
AI summary
A feedback loop, which feedbacks information of an output voltage or a load current, is provided. The feedback loop has a first mode, which digitalizes and feedbacks the information of the current voltage or the load current, and a second mode, which feedbacks the information as an analog value.