Choosing the right safety capacitor for a power factor correction (PFC) circuit involves a systematic, multi-step process to ensure effective EMI filtering and long-term reliability. It begins with ...

Large power supplies that operatefrom ac wall voltage havelarge input-filter capacitors. You mustlimit the inrush current to those capacitors.Otherwise, the supply may tripthe ac circuit breaker, or ...

Editor's Note: Here's another take on the transformerless AC line power supply, which finds use in some well-insulated, low-power devices. Our technical reviewer pointed out that C ac should be an ...