BAS21AVD,165 Discrete Semiconductor Products

Diodes are constructed in a variety of shapes and sizes, with each type having a different purpose and function. Rectifiers, or diode arrays, are a type of diode which contain multiple semiconductor diodes connected in such a way as to convert alternating current (AC) to direct current (DC). The BAS21AVD,165 is one such rectifier, designed specifically for high frequency switching power supplies.

Physical Description

The BAS21AVD,165 is a small surface-mount component which measures just above 2 mm tall and 0.4 mm wide. It is comprised of two diodes connected together in a “diode bridge” configuration. It is available in both SOT-23-3 and SOT-23-5 packages for easy placement and installation.

Application Field

The BAS21AVD,165 is commonly used in high frequency switching power supplies to convert AC voltage to the DC voltage necessary to power an electronic device. This type of diode array is also used in LED drivers, battery chargers and cell phone chargers, as well as other applications where a reliable DC voltage output is needed.

Power Ratings

The BAS21AVD,165 is rated for 800 volts of maximum reverse voltage, 20 volts of maximum forward voltage, and 200mA of maximum continuous forward current. It also has an operating temperature range of -40°C to +125°C.

Working Principle

The BAS21AVD,165 has two diodes connected together in a “diode bridge” configuration. When AC is applied to the diode array, the current is first held in check by the two diodes, which alternate between being forward-biased and reverse-biased with the changing AC voltage. When the forward-biased diode is charging, the current will be drawn through the forward diode, thus producing a DC output. This process continues so long as AC voltage is present; as the voltage alternates, the current alternates, which results in a steady DC output.

Conclusion

The BAS21AVD,165 is a rectifier, or diode array designed specifically for high frequency switching power supplies. It is rated for 800 volts of maximum reverse voltage, 20 volts of maximum forward voltage, and 200mA of maximum continuous forward current, and has an operating temperature range of -40°C to +125°C. The diode array converts AC voltage to DC voltage, and is commonly used in LED drivers, battery chargers, cell phone chargers and other applications where a reliable DC voltage output is required.