SR520HB0G

Series:	Automotive, AEC-Q101
Packaging:	Bulk
Part Status:	Active
Diode Type:	Schottky
Voltage - DC Reverse (Vr) (Max):	200V
Current - Average Rectified (Io):	5A
Voltage - Forward (Vf) (Max) @ If:	1.05V @ 5A
Speed:	Fast Recovery = 200mA (Io)
Current - Reverse Leakage @ Vr:	100µA @ 200V
Capacitance @ Vr, F:	--
Mounting Type:	Through Hole
Package / Case:	DO-201AD, Axial
Supplier Device Package:	DO-201AD
Operating Temperature - Junction:	-55°C ~ 150°C

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Introduction

A single diode rectifier, such as the SR520HB0G, is an essential component in power electronics systems. It is used to convert alternating current (AC) to direct current (DC) and its duties may range from simple voltage regulation and AC/DC power conversion to signal demodulation and signal mixing applications. The most common application is as part of a bridge rectifier for power supplies in consumer products, motor controllers, and electric vehicle inverter systems.

Working Principle of a Single Diode Rectifier

The SR520HB0G is an ultrafast diode with a maximum junction capacitance of 0.013 pF. It operates on basic rectifying principles, where current only flows in one direction across the diode. When an AC signal is applied to the diode, only the positive portion of the signal is allowed to pass through, resulting in a unidirectional, positive-biased DC signal. The conduction losses during the positive half-cycle of the AC signal are minimized by the ultrafast reverse recovery time of the diode.The voltage drops across the diode depend on the current commutating in and out of the diode. When the current flowing into the diode starts to increase, the diode conducts and the voltage across the diode drops. The magnitude of the voltage drop increases with the current. When the current commutates out of the diode, the voltage drop across the diode increases. This phenomenon is known as dynamic reverse recovery time and is typical of ultrafast diodes.

Application Fields of the SR520HB0G Diode

The SR520HB0G is a high-power device intended for power supplies, motor controllers, and electric vehicle inverter systems. It has typical average forward current of 10A and reverse voltage of 1500V (V RRM ). The ultrafast reverse recovery time of the diode ensures that the conduction losses during the positive half-cycle of the AC signal are minimized.The SR520HB0G can also be used in a buck converter high-side diode configuration. A buck converter uses a diode to clamp the output voltage. A buck regulator operates by dissipating though its MOS transistor switch. The SR520HB0G diode is used as a clamping device, which limits the output voltage swing to provide a stable and clean output voltage.The SR520HB0G is also suitable for use in half-wave, full wave, and bridge rectification circuits. It is used in these circuits to convert AC to DC and provide a regulated DC output.In half-wave rectification circuits, the diode is used to allow DC current to flow during the positive half cycle and block current during the negative half cycle. The resulting output waveform is a sinusoidal half wave.In a full-wave rectification circuit, the diode is used to allow DC current to flow during both the positive and negative half cycles. The resulting output waveform is a sinusoidal wave, with higher peaks than the half-wave circuit output.In bridge rectification circuits, the diode is used to allow DC current to flow during both the positive and negative half cycles. The resulting output waveform is a square wave. This type of circuit is most commonly used in power supplies and motor controllers.

Conclusion

The SR520HB0G diode is an ultrafast diode with a maximum junction capacitance of 0.013pF. It is suitable for use in high-power applications such as power supplies, motor controllers, and electric vehicle inverter systems. It is used for converting AC to DC, and can be found in rectification, buck-converter, and bridge rectifier circuits. The SR520HB0G is a reliable and efficient diode for these applications with its ultrafast reverse recovery time.

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