Multiplexed DC Voltage Regulation Circuit With Segmented Feedback Control
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Solution Overview
Problem
Multiplexed DC voltage regulation output circuits have low reliability due to abnormal voltage increases in high voltage output ports, which can be harmful to electronic apparatuses.
Innovation Solution
A multiplexed DC voltage regulation output circuit with a control circuit that adjusts the internal resistance of the high voltage port to maintain normal high voltage levels, using a transistor and RC shunt circuit to regulate voltage and prevent abnormal increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the power control chip raises the duty ratio to increase the voltage of the first output port, then the voltage regulation capability is improved, but the voltage of the second output port becomes abnormal and harmful
Solution Approach 1:
The feedback circuit is segmented into two independent parts: one monitoring the first output port voltage and another monitoring the second output port voltage. Each has its own feedback path to the power control chip, allowing independent control and preventing voltage abnormalities in either output port.
Solution Approach 2:
The patent implements dual feedback paths: one feedback path monitors the first output port voltage and another monitors the second output port voltage. Both feedback to the power control chip independently, enabling real-time voltage regulation and preventing abnormal voltage increases that would harm connected devices.
2Device complexity
If a single feedback circuit is used for both output ports, then the device complexity is reduced, but the reliability of voltage regulation deteriorates
Solution Approach 1:
The feedback circuit is divided into two separate feedback circuits, each dedicated to monitoring one output port. This segmentation ensures that voltage fluctuations in one port do not affect the regulation of the other port, thereby improving overall system reliability without significantly increasing complexity.
Solution Approach 2:
Each feedback circuit is optimized locally for its specific output port requirements. The first feedback circuit is tailored for the first output port voltage characteristics, while the second feedback circuit is tailored for the second output port, ensuring optimal regulation performance for each port independently.
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 solution ensures high reliability by preventing voltage rises in the high voltage output port, maintaining stable voltage levels and protecting electronic apparatuses.
Implementation Method 1
The positive electrode of the LED 141 is connected through the first resistor 110 to a node between the second half wave rectification circuit 16 and the second filter circuit 18. When current flows though the LED 141, the LED 141 emits light beams on the photistor 145.
Implementation Method 2
The photistor 145 receives the light beams and is switched on, whereupon current flows through the photistor 145 from the collector electrode to the emitter electrode. The current flowing through the photistor 145 is proportionate to the current flowing through the LED 141.
Data Source
AI summary
An exemplary multiplexed DC voltage regulation output circuit (2) comprises a first output circuit, a second output circuit, a transformer (21), a power control chip (22), a feedback circuit (20), and a control circuit (26). The first output circuit is configured for outputting low voltage. The second output circuit is configured for outputting high voltage. The transformer is configured for outputting voltages to the first output circuit and the second output circuit. The feedback circuit feeds composite signals from the first output circuit and the second output circuit back to the power control chip. The power control chip adjusts the output voltages of the transformer by changing impulse width of voltages transmitted into the transformer in accordance with the composite signals. The control circuit controls the output voltage of the second output circuit back to a normal high voltage when the output voltage is higher than normal.