Dual Switching Regulator Synchronization for EMI-Stable Power Delivery
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Solution Overview
Problem
Conventional power management systems face high total bill of materials (BOM) cost, unpredictable output power distribution, and significant electromagnetic interference (EMI) due to independent operation of switching regulators.
Innovation Solution
A power management system with a PD controller synchronizing two switching regulators, reducing BOM cost by integrating components and minimizing EMI through synchronization signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two switching regulators operate independently to power two devices, then each device can be powered separately, but the total BOM cost is high and EMI noise is significant
Solution Approach 1:
The patent combines two independent switching regulators into a synchronized dual-output configuration. The regulators share a common control signal and operate in unison, merging their control functions while maintaining separate power delivery capabilities. This reduces EMI through synchronized switching while preserving the ability to power two devices independently.
Solution Approach 2:
The synchronized switching regulator system provides multi-functionality by enabling a single power source to simultaneously and independently power multiple devices. The system can dynamically allocate power between outputs based on device requirements, making the power management system adaptable to various loading scenarios.
2Ease of operation
If two switching regulators operate independently, then each can control its output power, but the output power distribution is unpredictable and may be unsuitable
Solution Approach 1:
The patent implements a control mechanism that monitors the power demands of multiple devices and dynamically adjusts the power distribution from the shared power source. The controller receives feedback from each device's power requirements and modulates the switching regulators accordingly, ensuring stable and appropriate power allocation to each output.
Solution Approach 2:
The system dynamically adjusts power distribution based on real-time device requirements. The switching regulators can operate in different modes (synchronized or independent) depending on the loading conditions, providing adaptive power management that responds to changing operational demands.
3Adaptability or versatility
If two switching regulators are used to power two devices, then each device can be powered, but the total BOM cost is relatively high
Solution Approach 1:
The patent merges two independent power management systems into a single synchronized dual-output regulator. By sharing control circuitry, synchronization logic, and power management functions between the two outputs, the system reduces the total component count and BOM cost while maintaining the capability to independently power two devices.
Solution Approach 2:
The synchronized switching regulator provides multi-functional operation, serving as a single power management solution that can independently power multiple devices. This universal approach replaces what would traditionally require separate dedicated power regulators for each device, reducing overall system complexity and cost.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system optimizes output power distribution and reduces EMI by synchronizing switching regulators, enhancing efficiency and cost-effectiveness.
Implementation Method 1
The first switching regulator is configured to convert a first input power generated by a power source circuit to a first output power provided to a first connector
Implementation Method 2
The second switching regulator is configured to convert a second input power generated by the power source circuit to a second output power provided to a second connector
Implementation Method 3
The second switching regulator is configured to synchronize an operating state of the second switching regulator with an operating state of the first switching regulator according to the synchronization signal
Data Source
AI summary
A power management system includes a first switching regulator, a second switching regulator, and a power delivery (PD) controller. The first switching regulator is configured to convert a first input power generated by a power source circuit to a first output power provided to a first connector, and generate a synchronization signal. The second switching regulator is configured to convert a second input power generated by the power source circuit to a second output power provided to a second connector, and synchronize its operating state with an operating state of the first switching regulator according to the synchronization signal. The PD controller is configured to control the first switching regulator to adjust the first output power according to a first negotiation signal provided by the first connector, and control the second switching regulator to adjust the second output power according to a second negotiation signal provided by the second connector.