Switching Controller Parallel Power Sharing Phase-Shift
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Solution Overview
Problem
Existing power supply systems face inefficiencies due to high power losses and limited flexibility in parallel-output technologies, which are exacerbated by the need for current measurement and limited parallel channels.
Innovation Solution
A switching controller with power sharing capability that eliminates the need for current measurement by using phase-shift signals and integration circuits to synchronize switching signals across multiple channels, allowing for flexible and efficient power distribution without channel limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If parallel-output technologies are used to deliver more current, then the power supply can meet high-speed needs, but the power losses increase due to higher switching current
Solution Approach 1:
The patent divides the power supply into multiple independent channels (at least two channels) that operate in parallel. Each channel has its own switching controller and switching device, allowing the total output current to be distributed across multiple paths, thereby reducing the switching current and power losses in each individual channel while maintaining high total output current capability.
2Ease of operation
If balance current approach is used to achieve power sharing, then current distribution can be controlled, but current measurement is required which causes additional power losses
Solution Approach 1:
The patent extracts the current measurement function from the power sharing control mechanism. Instead of measuring switching current to achieve power sharing, the system uses voltage signals from a common output capacitor and timing-based control, eliminating the need for current sensors and associated power losses while maintaining power sharing capability across parallel channels.
Solution Approach 2:
The patent replaces the electrical measurement system (current sensors and measurement circuits) with a voltage-based timing control system. By using voltage signals from the output capacitor and synchronized timing mechanisms, the system achieves power sharing without mechanical or electrical current measurement, thereby eliminating the associated power losses.
3Device complexity
If only two or three parallel channels are developed, then the circuit complexity is limited, but the flexibility of application is reduced
Solution Approach 1:
The patent designs a universal parallel channel architecture where each channel uses the same switching controller and switching device configuration. This modular design allows the system to be easily scaled from two channels to any number of parallel channels without increasing circuit complexity proportionally, as each channel is a standardized unit that can be added or removed based on application requirements, thereby enhancing flexibility and adaptability.
Data Source
AI summary
A switching controller for a parallel power supply is disclosed. The switching controller includes an input circuit coupled to an input terminal to receive an input signal for generating a phase-shift signal, a first integration circuit coupled to the input circuit to generate a first integration signal in response to a pulse width of the input signal, and a control circuit coupled to the first integration circuit to generate a switching signal for switching the power supply, the switching signal being enabled in response to the phase-shift signal, a pulse width of the switching signal being determined in accordance with the first integration signal.