A177PD

Series:	--
Packaging:	Bulk
Part Status:	Active
Diode Type:	Standard
Voltage - DC Reverse (Vr) (Max):	1400V
Current - Average Rectified (Io):	100A
Speed:	Standard Recovery >500ns, > 200mA (Io)
Reverse Recovery Time (trr):	2.3µs
Capacitance @ Vr, F:	--
Mounting Type:	Stud Mount
Package / Case:	DO-205AA, DO-8, Stud
Supplier Device Package:	--
Operating Temperature - Junction:	-40°C ~ 125°C
Base Part Number:	A177

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A177PD application field and working principle

A177PD is a single rectifier diode, which is widely used in power supplies due to its capability of rectifying alternating current (AC) to direct current (DC). Moreover, this diode is robust enough to handle high voltages, featured with fast switching time. Due to these features, A177PD is applied in a variety of fields and devices. This article will introduce its application field and working principle.

Application Field

A177PD is a versatile diode and is utilized in a variety of applications. It is often used in switching power supplies, where its fast switching time is utilized to quickly rectify AC to DC. Moreover, A177PD is also applied in UPS due to its ability to handle high voltages and current surges. Furthermore, A177PD is also used in vehicle power supplies, LED lighting, as well as audio and video related products.

Working Principle

A177PD is a semiconductor diode and its basic operation is the same with other diode. In simplified terms, A177PD can be seen as a one-way valve for electricity, which allows the current only flow in one direction and block the current in the opposite direction. In short, it rectifies AC to DC by allowing current only flow in one direction at one time.When the voltage polarity is positive, the diode allows the current to flow from anode to cathode and thus LED is off, this is OFF-state. As the voltage polarity changes to negative, the diode blocks the current and LED is on, this is ON-state. This kind of working mode is called half-wave rectification and it is the most basic working method for A177PD.Furthermore, full-wave rectification can also be achieved by the combination of a pair of A177PD in an anti-parallel configuration. This means that the anode and cathode of one diode are connected to the cathode and anode of another diode. Since in full-wave rectification, the current is allowed to flow in both directions, this kind of structure eliminates the differences between individual half-wave cycles and further improve the power conversion efficiency of a rectification stage.

Conclusion

A177PD is a widely used single rectifier diode, which is suitable for high voltage and current surge environment. In terms of application field, A177PD is useful for power supplies, UPS, vehicle power supplies, LED lighting and audio/video related products. Also, it is capable of both half-wave and full-wave rectification, depending on the configuration.

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