Multifunctional Dimmable Power Supply With Dual Control
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Solution Overview
Problem
Existing dimmable power supplies are limited in compatibility, universality, and flexibility, as they can only support either phase-cut dimming or analog signal dimming, lacking adjustable bus voltage, overtemperature and pressure reduction protection, and multi-path independent output functions.
Innovation Solution
A multifunctional dimmable driving power supply is designed with an AC input, high-power factor correction circuit, AC/DC conversion circuit, phase-cut and analog input signals, MCU control module, multishift switching device, MOSFET driving circuit, rotational potentiometer, and temperature sensor module, enabling compatibility with both phase-cut and analog signal dimming, adjustable output bus voltage, and enhanced protection and output functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the power supply is designed with a fixed PWM frequency output dimming function, then the dimming control is simple, but the compatibility with different dimming methods (phase-cut and analog signal) is poor
Solution Approach 1:
The power supply incorporates dual dimming control circuits that support both phase-cut dimming and analog signal dimming functions simultaneously. The control module can recognize and process different dimming signals, enabling the same power supply to be compatible with multiple dimming methods without requiring separate dedicated designs for each method.
2Device complexity
If the power supply supports only one dimming method (phase-cut or analog), then the control circuit is simple, but the flexibility for simultaneous dimming and color adjustment is limited
Solution Approach 1:
The control functionality is divided into independent modules: a dimming control module that processes dimming signals and a color temperature control module that handles color adjustment signals. These segmented modules can operate independently or simultaneously, allowing the power supply to provide both dimming and color temperature adjustment functions without excessive complexity in the overall control circuit.
3Device complexity
If the power supply has fixed bus voltage, then the circuit design is simple, but the adaptability to different voltage requirements and wide voltage input (110-277 AC or 200-347 AC) cannot be achieved
Solution Approach 1:
The power supply incorporates an adjustable bus voltage circuit that can dynamically change the bus voltage level according to different operating conditions and requirements. This dynamic voltage adjustment capability, combined with a wide input voltage range rectifier circuit, enables the power supply to adapt to both 110-277 AC and 200-347 AC input voltages while maintaining simple overall circuit design through modular architecture.
4Device complexity
If the power supply lacks protection functions (overtemperature and pressure reduction), then the device structure is simple, but the reliability and safety are reduced
Solution Approach 1:
The power supply incorporates protection circuits that automatically detect and respond to abnormal conditions without external intervention. The overtemperature protection circuit monitors temperature and automatically shuts down or reduces power when thresholds are exceeded, while the pressure reduction protection circuit similarly monitors and responds to pressure conditions, providing self-service safety functions that enhance reliability without significantly increasing structural complexity.
Data Source
AI summary
The present disclosure discloses a multifunctional dimmable driving power supply, including an alternating current (AC) input, a high-power factor correction circuit, an AC/direct current (DC) conversion circuit, a load, a phase-cut input signal, an analog input signal, a micro control unit (MCU) control module, a multishift switching device, a metal oxide semiconductor field effect transistor (MOSFET) driving circuit, a rotational potentiometer, and a temperature sensor module. The multishift switching device on the power supply is used to select different frequency outputs, switch different color temperature values, and select different curve outputs, so that the multifunctional dimmable driving power supply has high universality.