Power Management Circuit Dynamic Reference Voltage Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional power management circuits face inefficiencies due to constant reference voltage, leading to undesirable power loss regardless of whether the output voltage is set closer to the battery voltage or the input voltage, as both linear regulators operate in their linear regions, resulting in higher power loss in either the input-to-output or output-to-battery paths.
Innovation Solution
A power management circuit that adjusts the output voltage based on the power supplying capability of the input terminal by using a detection circuit to generate an adjustment signal, which is used by a reference voltage adjustment circuit to dynamically adjust the reference voltage, allowing the first and second switches to operate in their linear or switching regions optimally, thereby minimizing power loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a constant reference voltage is used to simplify the circuit design, then device complexity is reduced, but power supply efficiency deteriorates due to unavoidable power loss
Solution Approach 1:
The patent implements feedback by using a detection circuit to monitor the power supplying capability of the input terminal and using this information to adjust the reference voltage through the reference voltage adjustment circuit. This feedback mechanism allows the system to automatically optimize power supply efficiency without requiring complex manual intervention, resolving the contradiction between simplicity and efficiency.
Solution Approach 2:
The system performs self-service by automatically detecting input power capability and adjusting its own reference voltage accordingly. The detection circuit and reference voltage adjustment circuit work together to enable the power management circuit to self-optimize its operation, achieving improved efficiency without proportionally increasing complexity.
Data Source
AI summary
The present invention discloses a power management circuit, and a control circuit and a control method thereof. The power management circuit converts an input voltage at an input terminal to an output voltage at an output terminal, and charges a battery from the output terminal. The present invention detects a power supplying capability of the input terminal to generate an adjustment signal, and adjusts the output voltage according to the adjustment signal.