CDSOD323-T05SC Circuit Protection

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Transient Voltage Suppressors (TVSs) are specialized diodes used to protect electronics from electrical overstress (EOS) caused by electrical transients. CDSOD323-T05SC is a TVS diode specifically designed to protect sensitive components from electrical transients such as electrostatic discharge (ESD) and lightning-induced spikes. This article will explore the application field and working principle of CDSOD323-T05SC TVS diode.

Application Field of CDSOD323-T05SC

The CDSOD323-T05SC is an ultra-small TVS in SOD323 package with a VBR of ±12V. It is suitable for protection of sensitive components and systems in the following applications:

• Mobile phone charger/accessories
• Automotive electronic control unit (ECU)
• Set-top-box
• Consumer laptop/tablet
• Communication and networking equipment
• Industrial components

Working Principle of CDSOD323-T05SC

CDSOD323-T05SC utilizes a dynamic clamping circuit to suppress transients caused by ESD and voltage surges. A single NPN transistor is used in the circuit as the surge clamp. During ESD or surge events, the NPN transistor, in combination with an integrated Schottky diode, clamps the voltage rail to protect sensitive components.

The dynamic clamping circuit of the CDSOD323-T05SC is designed to automatically respond to the current requirements of the transient events. When an ESD or surge event occurs, the device will adjust the amount of current it can provide according to the size and magnitude of the event. This allows the device to respond quickly to the transient event, limiting the voltage supplied to the protected circuit.

The device also utilizes a Zener diode to provide additional protection. During an ESD or surge event, the integrated Zener diode will shunt any current generated by the transient occurrence to ground. This helps to further protect the protected circuit, as the current is not allowed to enter the protected circuit.

The CDSOD323-T05SC is a low capacitance transient voltage suppressor, and is able to provide ESD and surge protection up to 8 kV without generating additional noise or having a negative impact on data signals.

Conclusion

CDSOD323-T05SC is an ultra-small Transient Voltage Suppressor (TVS) designed to provide protection against Electrostatic Discharge (ESD) and voltage surges. It is suitable for a variety of applications, including mobile phone chargers/accessories, automotive electronic control units (ECUs), set-top-boxes, consumer laptops/tablets, communication/networking equipment, and industrial components. The device utilizes a dynamic clamping circuit, Zener diode, and Schottky diode to provide protection to the protected circuit, and is able to provide ESD and surge protection up to 8 kV without generating additional noise or having a negative impact on data signals.

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