Dynamic Protection Circuit Voltage Adjustment
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Solution Overview
Problem
Power supply circuits face challenges in immediately adjusting overvoltage and undervoltage protection values, leading to potential abnormal operations due to insufficient bus capabilities, which can result in mistaken detection of voltage events.
Innovation Solution
A dynamic protection circuit comprising an adjustment circuit, detection circuit, control circuit, and counter circuit that adjusts output voltage based on predetermined values, disabling detection during changes to update upper and lower limit values proportionally with the output voltage, enabling detection once a target count value is reached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the power supply circuit adjusts the output voltage, then the output voltage is improved, but the overvoltage protection value and undervoltage protection value cannot be immediately adjusted due to insufficient bus, leading to abnormal operation
Solution Approach 1:
The patent applies preliminary action by disabling the detection circuit before adjusting the protection values. The control circuit generates a disable signal to turn off the detection circuit prior to voltage adjustment, preventing false detections during the transition period when protection values are being updated. This ensures that the detection circuit does not operate during the adjustment period when protection values are invalid.
Solution Approach 2:
The patent implements dynamics by making the protection values dynamically adjustable based on the output voltage. The system proportionally adjusts both the overvoltage protection value and undervoltage protection value when the output voltage changes, ensuring that protection thresholds adapt to the current operating conditions. This dynamic adjustment maintains accurate protection detection despite changes in operating parameters.
2Device complexity
If the power supply circuit uses fixed overvoltage and undervoltage protection values, then the detection is simple, but the protection values become inaccurate when output voltage changes
Solution Approach 1:
The patent applies parameter changes by making the protection values variable rather than fixed. The control circuit proportionally adjusts the overvoltage protection value and undervoltage protection value based on the output voltage changes. When output voltage increases, both protection values increase proportionally; when output voltage decreases, both protection values decrease proportionally. This maintains accurate protection thresholds adapted to current operating conditions.
3Duration of action of stationary object
If the detection circuit operates during voltage adjustment, then continuous monitoring is maintained, but false voltage event detections occur due to transient voltage changes
Solution Approach 1:
The patent applies preliminary action by disabling the detection circuit before adjusting the protection values. The control circuit generates a disable signal to turn off the detection circuit prior to voltage adjustment, preventing false detections during the transition period when protection values are being updated. This ensures that the detection circuit does not operate during the adjustment period when protection values are invalid.
Data Source
AI summary
A dynamic protection circuit including an adjustment circuit, a detection circuit, a control circuit, and a counter circuit is provided. The adjustment circuit adjusts an output voltage based on a predetermined value. The detection circuit detects whether the output voltage is higher than an upper-limit value or lower than a lower-limit value. The control circuit changes the predetermined value and disables the detection circuit while the predetermined value is being changed. The counter circuit starts to adjust a count value in response to the detection circuit being disabled. In response to the counter circuit adjusting the count value, the control circuit adjusts the upper-limit value and the lower-limit value to be proportional to the output voltage. In response to the count value being equal to a target value, the counter circuit enables the detection circuit.