基于DSP的光电倍增管电源设计

针对光电倍增管工作时需要稳定性高、电压可调的高压直流电源,设计了一款以DSP为控制芯片,+12V直流电压经移相全桥逆变、高频变压器升压以及倍压整流、滤波后得到所需的高压直流电,通过对输出电压检测并调整PWM的占空比,实现输出电压的稳定。实验结果表明,该电源稳定性和可调范围完全满足光电倍增管工作的要求。

Design of Power SuppIy Based on DSP for PhotomuItipIier

According to the demand of the high stabiIity,adjustabIe voItage for the power suppIy of photomuItipIier,a power suppIy was designed which controI ed by DSP.＋12v DC voItage is transformed by the phase-shift fuI bridge,high frequency trans-former booster and voItage doubIing rectifying,after fiItered we wiI get the required high voItage.If change the PWM duty cycIe based on the feedback of the voItage cIosed-Ioop,we wouId reaIize the stabiIity of output voItage.