AN2625催AC输入电压限制电路

AN2625催AC输入电压限制电路

AN2625
Application note

High AC input voltage limiting circuit

Introduction
The requirements on the switched mode power supply applications regarding the input AC
voltage range are constantly increasing: for example, the ultra wide input voltage range of
90 to 440 VAC is now commonly required in many applications (electricity meters, lighting,
factory automation). This inevitably leads to an increased working voltage levels and thus
limited safe operation of the power supply components. This ap