PW149RA1203F01

The PW149RA1203F01 is defined as an AC/DC desktop and wall adapter, and is designed to convert ac power from the mains to low-voltage dc power.

Application Field

This kind of AC/DC adapter can be used in many areas. For example, in computers, this adapter can be used to provide power for computer’s mainboard, peripheral device, and other components. It can also be used in consumer electronics field, such as household appliances, cell phone/laptop chargers, LED displays, medical products, and other small electronic gadgets.

Working Principle

To better understand how this AC/DC adapter converts mains ac power to low-voltage dc power, it is important to have a basic understanding of its working principle.

The PW149RA1203F01 is a linear adapter that uses a transformer. The transformer functions to step-down the voltage from the ac mains in order to provide the correct voltage for the applied load.

First of all, the ac mains power first passes through the Line Filter and an Fuse to protect both the adapter and the load from damage. Then, the ac mains power is sent to the transformer, which contains two windings - a primary and a secondary. The primary winding receives the ac voltage from the mains, and this voltage is transformed and emitted as a lower secondary voltage on the secondary winding.

Then, this lower secondary voltage passes through a bridge rectifier. A bridge rectifier is a type of rectifier that is used to convert ac voltage to dc voltage, and in this adapter, it is used to convert the secondary voltage from the transformer to a dc voltage. Finally, this dc voltage passes through the filter capacitor and a resistor for voltage regulation, and is then sent to the output port.

Through this process, the PW149RA1203F01 is capable of providing the desired dc voltage for the applied load, thus functioning as an adapter.