A power adapter is a device that converts electrical power from one form to another. Most power adapters are designed to convert alternating current (AC) from a wall outlet to direct current (DC) suitable for powering various electronic devices. The reason for this conversion is that many electronic components, such as microchips, transistors, and integrated circuits, operate on DC power. AC power from the mains supply has a constantly changing voltage and current direction, which could damage these sensitive components if directly applied.

　　The power adapter typically contains a transformer to step down the high voltage of the AC mains (usually around 110V or 220V depending on the region) to a lower voltage level. Then, a rectifier circuit is used to convert the AC into DC. This rectification process may involve diodes arranged in a specific configuration, such as a bridge rectifier. After rectification, a smoothing capacitor is often added to reduce the ripple in the DC output, providing a more stable DC voltage. Some advanced power adapters may also include additional circuitry for voltage regulation and protection against overvoltage, overcurrent, and short circuits. Understanding whether a power adapter is AC or DC and how it performs the conversion is essential for ensuring the proper functioning and safety of the connected electronic devices.

Read recommendations:

Switching power supply suppliers

300W Switching Power Supply

EI-28 ADAPTER

Premium AC Power Adapters

LEVEL VI POWER ADAPTER Factory