LED Power Supply Adapting 12V and 24V via Load Current Detection
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Solution Overview
Problem
Lighting construction companies face inconvenience due to the need for separate power supplies for 12V and 24V LED light source systems, requiring two drivers to meet inconsistent voltage requirements, leading to inventory management challenges.
Innovation Solution
A power supply system with a control circuit, detection circuit, and constant voltage control circuit that adjusts output voltage based on load current, switching between 12V and 24V to match the LED type, ensuring constant voltage output regardless of load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power supplies are used for 12V and 24V LED systems, then voltage requirements are met, but inventory management becomes complex
Solution Approach 1:
The power supply is designed to provide both 12V and 24V output capabilities through a single device. The control circuit detects load current and automatically switches between voltage modes, allowing one power supply unit to replace two separate units (12V and 24V versions), thereby simplifying inventory management while maintaining reliable voltage compliance
Solution Approach 2:
The power supply dynamically adjusts its output voltage based on real-time load current detection. When load current exceeds a threshold, the control circuit switches from 24V mode to 12V mode, and vice versa. This dynamic adaptation allows the same hardware to reliably serve different LED systems without manual intervention or complex inventory tracking
2Reliability
If two drivers are prepared for 12V and 24V LEDs, then voltage requirements are met, but operational convenience deteriorates
Solution Approach 1:
The power supply automatically detects the load current and self-determines whether to operate in 12V or 24V mode. The control circuit monitors load current in real-time and switches voltage modes accordingly, eliminating the need for manual selection or configuration by the user. This self-service functionality maintains accurate voltage matching while significantly improving operational convenience
Solution Approach 2:
The detection circuit continuously monitors load current and provides feedback to the control circuit. Based on this feedback, the control circuit adjusts the output voltage mode (12V or 24V) to match the LED system requirements. This closed-loop feedback mechanism ensures reliable voltage matching while making the system user-friendly through automatic adaptation
Data Source
AI summary
An operating method for a light-emitting diode (LED) power supply includes the following operations: controlling an output voltage to be a first voltage by a control circuit; detecting a load current by a detection circuit; maintaining the output voltage as the first voltage by a constant voltage control circuit when the load current is greater than zero, changing the output voltage from the first voltage to a second voltage by the control circuit when the load current is equal to zero, and the second voltage being greater than the first voltage.