Electronic ballast for setting and adjusting output power in fixed time via dial-up

Abstract

The invention discloses an electronic ballast for setting and adjusting output power in fixed time via dial-up, belonging to the technical field of electronic ballasts. The electronic ballast comprises an EMI (Electro-Magnetic Interference) filter circuit, a bridge type rectification and PFC (Power Factor Correction) circuit, a step-down switch circuit, a dial-up switch, a single chip circuit, a PWM (Pulse-Width Modulation) control circuit, a full-bridge driving circuit, a full-bridge inverter circuit and a resonant ignition circuit, wherein the dial-up switch, the single chip circuit, the PWM control circuit, the step-down switch circuit, the full-bridge inverter circuit and the resonant ignition circuit are connected sequentially; the EMI filter circuit, the bridge type rectification and PFC circuit and the step-down switch circuit are connected sequentially; the full-bridge driving circuit is respectively connected with the single chip circuit and the full-bridge inverter circuit; and the step-down switch circuit is further connected with the single chip circuit. The electronic ballast has simple structure, small volume and low energy consumption, can conveniently set the output power and adjust the output power in fixed time, and is suitable for being used as an electronic ballast of a ceramic metal halide.

Description

technical field [0001] The invention relates to an electronic ballast, in particular to an electronic ballast for a metal halide lamp. Background technique [0002] As a new type of energy-saving light source, ceramic metal halide lamps have been widely used because of their high luminous efficiency, good color rendering, and long life. Ceramic metal halide lamps need to be used in conjunction with electronic ballasts with excellent performance, and the requirements for the start-up process and timing control of electronic ballasts for ceramic metal halide lamps are relatively high. However, traditional electronic ballasts have disadvantages such as large volume, complex circuit, high energy consumption, high cost, poor stability and reliability, etc. At the same time, the electronic ballasts in the prior art do not have the function of setting and regularly adjusting the output power, which results in that when the voltage of the power grid is low, the generated light is v...

AI Technical Summary

Problems solved by technology

However, traditional electronic ballasts have disadvantages such as large volume, complex circuit, high energy consumption, high cost, poor stability and reliability, etc.

At the same time, the electronic ballasts in the prior art do not have the function of setting and regularly adjusting the output power, which results in that when the voltage of the power grid is low, the generated light is very dark, and normal lighting cannot be performed; when the voltage of the power grid is high, The output power of the circuit is very large, which reduces the service life of the ceramic metal halide lamp

This will also have a great impact on the performance, life and stability of the ballast

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