Multi-Channel Phase Shift Circuit for Stable Converter Voltage
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Solution Overview
Problem
Power converters in electronic devices face challenges with unstable voltage due to increased power consumption and electromagnetic interference, leading to higher circuit layout costs and reduced device lifetime, as they need to supply high power and often require numerous voltage stabilizing components.
Innovation Solution
A phase shift control circuit for a multi-channel system is introduced, comprising a pulse control circuit and current matching circuits, which distribute power consumption across different time periods to avoid voltage instability and reduce the need for capacitors, thereby minimizing circuit layout costs and extending device lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the power converter supplies high power to meet increased power consumption, then the power demand is satisfied, but voltage instability occurs due to electromagnetic interference
Solution Approach 1:
The power conversion system is divided into multiple independent channels (first power conversion channel, second power conversion channel, etc.), each with its own pulse control circuit. This segmentation distributes the power conversion load across multiple channels, preventing electromagnetic interference from causing voltage instability in a single channel while maintaining high overall power supply capability.
2Reliability
If a large number of voltage stabilizing components such as capacitors are added, then voltage stability is improved, but circuit layout cost increases
Solution Approach 1:
The invention extracts the voltage stabilization function from traditional passive components (capacitors) and implements it through active control via the phase shift control mechanism. The pulse control circuits with phase shift capability actively regulate voltage without requiring numerous capacitors, thereby maintaining voltage stability while reducing circuit layout cost and complexity.
3Productivity
If multiple channels operate simultaneously, then power distribution capability is improved, but voltage instability occurs due to overlapping power consumption periods
Solution Approach 1:
The invention implements periodic action by distributing power consumption across different time periods for different channels. The phase shift control circuits adjust the timing of power conversion operations so that channels operate in a staggered manner rather than simultaneously, maintaining high power distribution capability while avoiding voltage instability from overlapping operations.
Data Source
AI summary
A phase shift control circuit for a multi-channel system including a pulse control circuit and a current matching circuit is provided. The pulse control circuit includes first to third transistors, a front operational amplifier, comparers, a current mirror circuit, clock switch circuits and pulse generating circuits. The front operational amplifier has two input terminals connected to a voltage divider circuit and an output terminal of the first transistor respectively, and an output terminal connected to control terminals of all the transistors. One input terminal of the comparer is connected to an output terminal of the third transistor, and another input terminal of the comparer is connected to the output terminal of the first transistor or a reference voltage source. The pulse generators are connected to the comparers and the clock switch circuits respectively. The current mirror circuit is connected to the current matching circuit.