BAS20W-7

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Diodes, or rectifiers, convert alternating current (AC) to direct current (DC). This allows power supplies to rectify AC waveforms into DC through the use of rectifiers. One type of diode commonly used for power applications is the BAS20W-7. This single-phase rectifier is designed for use with AC to DC rectification in power supplies and performs at its best when used in an appropriate design.

The BAS20W-7 is an isolated Schottky barrier rectifier with a maximum forward current rating of 20A and a forward voltage drop of 570mV at 20A. The diode’s maximum reverse voltage rating is 200V and its reverse current, at 25°C, is 100nA (1mA, max). In addition, the rectifier’s average forward current is based on a 35°C ambient temperature and excludes the current surge present in the diode during turn-on. This is known as surge current or non-repetitive surge current. The device also has a slow recovering junction that allows it to recover from current conditions such as reversed polarity.

The BAS20W-7 is usually employed in LED and lamp drivers, switch mode power supplies (SMPSs), DC motors, solenoids, and electromagnets. In particular, it is used for forward and freewheeling rectification in DC to AC converters, and for precision rectification and diode-clamping in power supplies. As a freewheeling diode, it is generally employed in negative voltage converters and negative-voltage appplications. Its incorporation in power supplies boosts their performance by enabling them to minimize voltage ripple, noise, and EMI. This helps ensure that the power supply’s power delivery and efficiency are optimized.

The primary benefit of a Schottky rectifier is its low capacitance, which results in significantly reduced switching losses and low reverse recovery time. This reduces power loss in the device and allows for a higher frequency of operation and lower voltage drop, resulting in enhanced power delivery. Additionally, the rectifier’s low forward voltage drop improves power conversion efficiency. The rectifier’s extremely low reverse bias leakage current helps eliminate the degredation associated with typical diode leakage.

The BAS20W-7 features simplified and accurate switching logic control and power connections, enabling it to work with integrated circuits over a wide temperature range. Its low RMS output capacitor voltage ratings and surge capability ensure safe peak current delivery. The rectifier provides a single output, making it easier and more economical to use in power systems.

The BAS20W-7 diode is designed to have a low forward voltage drop and a high peak forward surge current rating. It is designed for use in low-to-medium power applications, such as temperature controls and slow start supplemental AC supplies. The diode’s reverse voltage rating is also relatively high, allowing for use in multiple applications where the reverse voltage may exceed the nominal forward voltage rating without causing damage to the diode. The BAS20W-7 is encased in a 4-pin TO-252 package, where the four pins correspond to the anode, the cathode, the gate, and the source, respectively.

In conclusion, the BAS20W-7 is a single-phase rectifier that can be used in AC to DC power supplies and rectification applications. It features an extremely low forward voltage drop, helping to improve power conversion efficiency and reduce switching losses. Its low reverse bias leakage current eliminates any diode degradation associated with typical diode leakage. The diode is also designed to have a high peak forward surge current rating and an encased in a 4-pin TO-252 package. Its use in LED and lamp drivers, switch mode power supplies, DC motors, solenoids and electromagnets is common.

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