Bypassable Power Converter Mode Transition Control
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Solution Overview
Problem
Existing power converter systems face challenges in effectively regulating output voltage with minimal ripple in the presence of time-varying current and power load, particularly in personal audio devices like wireless telephones and media players.
Innovation Solution
A power conversion system that includes a power converter and a bypass switch, controlled by a control circuit, which activates the bypass switch when the output voltage exceeds a threshold, allowing the input voltage to couple directly to the output, thereby minimizing effective resistance and maintaining voltage stability across varying loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a bypass switch is used to regulate output voltage, then voltage stability is improved, but unnecessary toggling increases transition latency
Solution Approach 1:
The control circuit predicts future load current and control current values based on historical data and system state, allowing it to anticipate when the bypass switch should be activated or deactivated. This predictive approach enables the system to prepare for mode transitions in advance, reducing actual transition latency while maintaining voltage stability through timely bypass switch control.
2Object-generated harmful factors
If the bypass switch is activated frequently to maintain voltage thresholds, then voltage ripple is reduced, but transition latency increases
Solution Approach 1:
The control circuit uses prediction algorithms to forecast future current values and determine optimal bypass switch activation times before actual voltage deviations occur. This allows the system to smooth voltage transitions proactively, reducing voltage ripple while minimizing the frequency and duration of bypass switch activations, thereby reducing overall transition latency.
Data Source
AI summary
In accordance with embodiments of the present disclosure, a power conversion system may include a power converter configured to receive an input voltage and generate an output voltage, a bypass switch arranged in parallel with the power converter and arranged to couple the input voltage to the output voltage when the bypass switch is activated, and a control circuit configured to control the power converter and the bypass switch based on the output voltage.