BD18IA5WEFJ-E2

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

BD18IA5WEFJ-E2 Application Field and Working Principle

The BD18IA5WEFJ-E2, classified as a linear voltage regulator, is typically used in electronic circuits. It is capable of converting an input voltage of up to 18 volts DC into a regulated output of 5 volts DC.

As a linear voltage regulator, BD18IA5WEFJ-E2 features an output voltage that is fixed by a resistor divider network placed at the output connections. The output voltage is stated in the device data sheet and is not adjustable. This type of regulation is simpler, cheaper, but also less efficient than switching regulators.

The working principle of BD18IA5WEFJ-E2 is quite straightforward. The linear regulator compares the output voltage on its output terminal to a 4.8V voltage reference. It then turns a power transistor on or off to produce a regulated output voltage that is close to the reference voltage. The regulating transistor is turned on and off to keep the output voltage within the regulated voltage range.

The output of the BD18IA5WEFJ-E2 is also protected against over-current and short circuit conditions. When it encounters an over-current situation, the Transistor\'s base-emitter voltage will increase, and this increases the output voltage. If the current is high enough, the regulation will stop completely, completely shutting down the output voltage. In this way, the IC protects the circuit from destructive over-current conditions.

In conclusion, the BD18IA5WEFJ-E2 linear voltage regulator is widely used in electronic circuits to convert an input voltage of up to 18 volts DC into a regulated output of 5 volts DC. It features a simple and reliable working principle that relies on a 4.8V voltage reference, a regulating transistor, and an over-current protection circuit. This type of regulator is simpler, cheaper, and less efficient than the fancier switching regulators.

The specific data is subject to PDF, and the above content is for reference