In order to shape the input line current and to reduce the harmonic currents, the active power factor correction circuitry (APFC), consists of APFC controller TDA4863, is required in front of the electronic ballast.

• 为了得到连续的交流电网输入电流和降低谐波电流,在电子镇流器前端配备了有源功率因数控制(APFC)模块TDA4863组成的有源功率因数校正电路。