Power Converter Resistor Configuration for Low Quiescent Voltage Regulation
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Solution Overview
Problem
Existing power converter chips in wearable devices suffer from high quiescent currents during voltage regulation, which affect standby duration, and existing voltage regulation methods either introduce interference, are inflexible, or require high current consumption.
Innovation Solution
A power conversion circuit with a configuration resistor R set, controlled by a processor, allows for adjustable resistance values through switch configurations, reducing parasitic interference and quiescent current, and enabling flexible voltage regulation without real-time I2C communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If voltage regulation is performed to stabilize output voltage at set configuration values, then output voltage stability is improved, but quiescent current increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple fixed resistance values in the voltage division circuit. These resistance values are determined in advance during circuit design and manufacturing, allowing the power converter to achieve different output voltage configurations without requiring real-time adjustment components. The processor selects from pre-defined resistance configurations, enabling voltage regulation while minimizing quiescent current consumption by choosing appropriate fixed resistance values for different operating modes.
2Adaptability or versatility
If real-time I2C communication is used for voltage regulation, then adaptability to different loads is improved, but quiescent current and communication overhead increase
Solution Approach 1:
The patent applies segmentation by dividing the voltage regulation function into discrete, pre-configured resistance values. Instead of continuous real-time adjustment via I2C communication, the system segments the voltage regulation into multiple fixed configurations (e.g., first configuration value, second configuration value, third configuration value). The processor selects from these segmented options based on load requirements, eliminating the need for continuous communication while maintaining adaptability to different operating conditions.
Solution Approach 2:
The patent implements periodic action by using non-real-time, event-driven configuration changes. Rather than continuous I2C communication, the system updates voltage division ratios periodically or on-demand based on detected load changes. The processor determines when configuration changes are needed and updates the voltage division circuit accordingly, reducing communication overhead and quiescent current while maintaining load adaptability.
3Adaptability or versatility
If external voltage division resistors are used for voltage regulation, then flexibility is improved, but parasitic interference increases
Solution Approach 1:
The patent applies merging by integrating the voltage division resistors directly into the power converter chip. Instead of using separate external resistors connected via wires, the resistance elements are combined with the power converter circuitry in a single integrated package. This eliminates the parasitic inductance and resistance of external connections while maintaining the ability to provide multiple voltage division ratios through integrated switching mechanisms controlled by the processor.
Data Source
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AI summary
This application provides a power conversion circuit and an electronic device. In the power conversion circuit, a configuration resistor of the power conversion circuit is disposed between a set input end of a power converter and a ground, a resistance value is controllable, and the configuration resistor is configured to generate a configuration voltage for the set input end at a corresponding resistance value. The power converter of the power conversion circuit can generate and output a corresponding output voltage based on the configuration voltage. That is, in this application, regulation of the output voltage is implemented by adjusting a resistance value of the configuration resistor. In addition, a voltage divider resistor responsible for collecting the output voltage is disposed in the power converter, to control a parasitic parameter. Therefore, a resistance value of the voltage divider resistor may be set to be greater than a preset value, to reduce a leakage current, so that a quiescent current of the power converter is reduced.