Separately excited 25W-36W energy-saving lamp electronic ballast circuit

一种它激式25w~36w节能灯电子镇流器电路

Abstract

A separately excited 25W-36W energy-saving lamp electronic ballast circuit comprises a filter circuit, an over-voltage protection circuit, a bridge rectifier circuit, a half-bridge oscillation and drive circuit, an abnormal protection circuit and another half-bridge oscillation and drive circuit, wherein the filter circuit can effectively inhibit electromagnetic interference caused by radiation and conduction; the over-voltage protection circuit can absorb the instant high pulses of input voltage, so as to prevent the instant high pulses from entering the follow-up circuits to result in failures; the bridge rectifier circuit can convert 50 Hz AC voltage input by the over-voltage protection circuit into 100 Hz unidirectional pulse voltage; the half-bridge oscillation and drive circuit enables a half-bridge tube and the output frequency to be more stable; the abnormal protection circuit provides a stable voltage for the output circuit through trigger failures or void lamp protection, lamp filament open circuit protection and low input voltage protection; and the other half-bridge oscillation and drive circuit adopts a dedicated control chip, and can drive a half-bridge circuit formed by an MOSFET (Metal-Oxide -Semiconductor Field Effect Transistor). The utility model has the advantages of stable power factor and frequency, wide power supply voltage range, and low temperature rise, high conversion efficiency and long service life when used together with a lamp tube.
一种它激式25W~36W节能灯电子镇流器电路,包括一个滤波电路,可有效抑制因辐射和传导所引起的电磁干扰;一个过压保护线路可对输入电压的瞬间高脉冲进行吸收,使之不能进入后序电路,避免可能造成故障;一个桥式整流电路可将过压保护电路输入的50Hz交流电压转换成100Hz的单向脉冲电压;一个半桥振荡及驱动电路,使半桥管和输出的频率更加稳定;一个异常保护电路通过触发失败或无效灯保护、灯丝开路保护、低输入电压保护给输出的电路提供一个稳定的电压;一个半桥振荡及驱动电路,其中该电路采专用控制芯片,可驱动MOSFET组成的半桥电路本实用新型有功率因数、电源电压范围宽和频率稳定,和灯管配套工作时温升低、转换效率高、寿命长的优点。

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    CN-103139998-AJune 05, 2013峒鑫科技股份有限公司照明保护电路