Solar energy supply light-emitting diode (LED) constant current driving power with controllable voltage

Abstract

The invention discloses a solar energy supply light-emitting diode (LED) constant current driving power with controllable voltage, wherein the solar energy supply LED constant current driving power with the controllable voltage is simple in structure, high in transfer efficiency and wide in output voltage range, and use cost can be reduced. The solar energy supply LED constant current driving power with the controllable voltage comprises a solar energy charging circuit and an energy storage element connected with the solar energy charging circuit. Output of the energy storage element is transmitted to a pulse-width modulation (PWM) power driving circuit, and the output of the energy storage element is further connected with a power supply detection circuit which sends a detection signal to a charge control circuit to control the solar energy charging circuit. The PWM power driving circuit is connected with an output circuit, a timing circuit and a transmission gain and frequency adjustment circuit, the output circuit feeds a current signal back to the PWM power driving circuit through a current detection circuit, and the output circuit respectively feeds an undervoltage signal and an overvoltage signal back to the PWM power driving circuit corresponding to an undervoltage detection circuit, an undervoltage feedback circuit, an overvoltage detection circuit and an overvoltage feedback circuit.

Description

technical field [0001] The invention relates to an LED constant-current driving power supply, in particular to a solar-powered and voltage-controllable LED constant-current driving power supply with simple structure, high conversion efficiency, wide output voltage range and reduced use cost. Background technique [0002] At present, LED has been widely used in many fields due to its small size, light weight, low energy consumption, safety and reliability, and long life (up to 100,000 hours). Since the brightness of the LED is controlled by adjusting the current, a constant current drive power supply is required to convert the power supply (high-voltage power frequency AC, low-voltage power frequency AC, low-voltage DC, high-voltage DC, etc.) into a specific voltage and current. There are many types of existing LED constant current drive power supplies, but most of them have limited output voltage range and low power factor, and the general conversion efficiency is only 80%~9...

AI Technical Summary

Problems solved by technology

There are many types of existing LED constant current drive power supplies, but most of them have limited output voltage range and low power factor, and the general conversion efficiency is only 80%~90%, while the constant current drive power supply with conversion efficiency higher than 90% has complex structure and difficult manufacturing high cost

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