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Diodes - Zener - Single

The SML4747-E3/61 is a Zener Single Diode designed for use in a variety of applications. The device is a high-voltage, low-current, low-capacitance, low-noise, surface mount diode that provides excellent protection against transient voltage and over-voltage conditions. This single diode is also suitable for use in high-reliability applications such as automotive systems, consumer electronics, and industrial control systems.

Application Field

The SML4747-E3/61 is suitable for use as a Zener clamp circuit in a wide range of DC-DC converter applications. It can be used to protect the output of a power supply from over-voltage conditions and to provide reverse polarity protection for the input of a power supply. The diode can also be used in EMI/RFI protection, switchmode power supplies, battery-operated systems, and voltage regulator circuits. The SML4747-E3/61 is also suited for automotive applications such as body control systems, lighting systems, and motor control applications.

Working Principle

The SML4747-E3/61 is a Zener Single Diode that operates on the principle of reverse bias. The reverse bias is generated by the application of an external voltage that is greater than the peak reverse voltage rating of the diode. When this reverse bias voltage is applied to the diode, minority carriers are forced across the junction and holes are created in the diode\'s P-type material. These holes diffuse into the N-type material and combine with the electrons that are already present, creating a region of lower resistance. This behavior is responsible for the diode\'s low-voltage, low-current, and low-noise characteristics.

In the event of an over-voltage condition, the diode will conduct current from the source, clamping the voltage to the specified peak reverse voltage rating of the device. The low-capacitance of the SML4747-E3/61 allows for fast transient response that is suitable for a wide range of applications. The low-noise characteristics of the device ensures reliable operation in high-reliability applications such as automotive systems, consumer electronics, and industrial control systems.

Conclusion

The SML4747-E3/61 is a high-voltage, low-current, low-capacitance, low-noise, surface mount diode. It is suitable for use as a Zener clamp circuit in a wide range of DC-DC converter applications. In addition to providing EMI/RFI protection and over-voltage protection, the diode has excellent transient response characteristics for fast switching applications and low-noise characteristics for use in high-reliability applications.

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