Intelligent dimming driver for networking-type high-power packaged LEDs

Abstract

The invention provides an intelligent dimming driver for networking-type high-power packaged LEDs, which comprises a power adjusting system and a digital control system, wherein the power adjusting system is formed by sequentially connecting a single-phase rectifying filtering module, a resonant soft switch inverting module and a transforming and rectifying module which are switched in a single-phase alternating current input power; and the digital control system is formed by connecting an abnormity detection protection module, a sampling detection module, an ARM micro-processor system, a high-frequency driving module, a parameter setting module and a serial bus communication module mutually. The intelligent dimming driver for the networking-type high-power packaged LEDs can automatically match constant current, constant voltage and variable property driving output according to the working property of the high-power packaged LEDs so as to realize remote networking and intelligent dimming.

Description

technical field [0001] The invention relates to an LED dimming driver, in particular to a networked high-power group LED intelligent dimming driver. Background technique [0002] Lighting energy consumption occupies a pivotal position in the entire electricity consumption. According to the data from the US Department of Energy, 22% of the electricity consumption in the United States is in the lighting field. It is even worse in China. Taking Shanghai as an example, lighting electricity consumption accounts for more than 1 / 3 of the city's electricity consumption. A lighting revolution that is both energy-saving and environmentally friendly is imminent. Semiconductor lighting (LED lighting) is a new generation of cold light source developed in the 1990s. It has incomparable advantages over traditional light sources: energy saving, environmental protection (no harmful substances such as mercury), long life (50,000 hours), Reducing maintenance costs, providing better light qual...

AI Technical Summary

Problems solved by technology

At present, there are two ways to drive LEDs. One is that a single constant voltage source supplies multiple constant current sources, and each constant current source supplies power to each LED separately. This method is flexible in combination, and the failure of one LED will not affect other LEDs. work, but the cost is slightly higher; the other is direct constant current power supply, LED series or parallel operation, low cost, but poor flexibility, and it is necessary to solve the problem that a certain LED failure does not affect the operation of other LEDs

[0004] LED drive power supply can be divided into the following six categories according to the circuit structure: conventional transformer step-down (weight is heavy, power supply efficiency is also very low, generally 45% to 60%, reliability is not high), electronic transformer step-down (low conversion efficiency, The voltage range is narrow, generally 180-240V, with large ripple interference), capacitor step-down (easy to be affected by grid voltage fluctuations, low power supply efficiency, and easy to damage the chip), resistor step-down (very low efficiency, and the reliability of the system is also relatively low) Low, it is greatly disturbed by grid voltage changes, it is not easy to make a regulated power supply), RCC step-down switching power supply (the voltage regulation range is relatively wide, the power supply efficiency is relatively high, generally 70% to 80%, and it is widely used , the switching frequency is not easy to control, the load voltage ripple coefficient is large, and the load adaptability to abnormal conditions is poor), PWM control switching power supply

Images