Switching Regulation Controller Reducing Voltage Overshoot
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Solution Overview
Problem
Digital power-supply circuits face challenges in reducing overshoot during output voltage rise without sacrificing rising time, as conventional techniques like 'soft start' and motor RPM control methods often compromise rapid response.
Innovation Solution
A switching regulation controller that detects errors between output and target voltages, generates control amounts using past values, and switches to candidate values when errors are below a threshold, allowing for rapid voltage rise while minimizing overshoot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional soft start technique is used to reduce overshoot, then overshoot is reduced, but rising time is prolonged
Solution Approach 1:
The control amount generation unit dynamically adjusts the control strategy based on real-time error magnitude. When error is large, it generates control amounts for rapid voltage rise; when error becomes small (below threshold), it switches to a different control mode to prevent overshoot, thus adapting the control behavior to the current system state
Solution Approach 2:
The system changes the control parameter (control amount) based on the error threshold condition. By comparing the error magnitude against a predetermined threshold and adjusting the control amount generation strategy accordingly, the system achieves different control objectives at different stages of the voltage rise process
2Adaptability or versatility
If digital system is used for flexible design and manufacturing variation suppression, then adaptability and reliability are improved, but stability margin deteriorates due to delay time
Solution Approach 1:
The system continuously monitors the error between output voltage and target voltage, and uses this feedback information to adjust the control amount in real-time. The error detection and feedback mechanism allows the digital system to compensate for delay effects by responding to current error states
Solution Approach 2:
The control amount generation unit prepares and adjusts control amounts in advance based on predicted error trends. By proactively adjusting the control amount before the error becomes critical, the system compensates for the inherent digital processing delays
Data Source
AI summary
A switching regulation controller for driving a switch circuit included in a switching regulator which converts an input voltage to a target voltage, and outputs the target voltage. The switching regulation controller detects an error between the output voltage and the target voltage, and uses the detected error and a control amount generated previously to control the switch circuit so that the output voltage is coincident with the target voltage according to a transfer function.