5KASMC22AHM3_A/H Circuit Protection

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TVS (Transient Voltage Suppressor) diodes are a type of semiconductor device that is used to protect electronic circuits from voltage transients. Commonly found in DC-DC converters, power supplies, and computers, TVS diodes are designed to suppress or absorb large voltage spikes and thus protect the sensitive circuitry. This article will explore the application field and working principle of the 5KASMC22AHM3_A/H TVS diode.

Application Field

The 5KASMC22AHM3_A/H TVS diode is an unidirectional device designed for voltage protection in high current, high temperature applications such as 5V and 12V DC-DC applications. It is ideal for use in high-current power supplies, high-voltage voltage regulators, and other applications requiring integrated over-voltage protection. The device features fast response time and low capacitance, making it suitable for protecting microprocessors and other sensitive components.

The 5KASMC22AHM3_A/H is also designed to handle high-power applications such as power systems for solar cells, power transformers, and so forth. The device\'s low-dynamic resistance makes it suitable for supplementing existing overvoltage protection implementations. The 5KASMC22AHM3_A/H contains integrated Schottky diodes between drain and source to provide improved limiting characteristics and power dissipation.

Working Principle

The 5KASMC22AHM3_A/H TVS diode features a multilayer construction with a silicon-oxide passivation layer sandwiched between two thick layers of silicon nitride. This anode-gate structure offers superior protection from voltage surges and ESD (Electro-Static Discharge) than a one-layer structure. The nitride layers act as a barrier against large voltage spikes and the passivation layer isolates the anode from the gate.

The 5KASMC22AHM3_A/H features a Schottky-diode structure between the drain and source. This allows the device to switch quickly between conducting and non-conducting modes, providing excellent protection against voltage transients. The Schottky diode also helps to reduce capacitance and power dissipation, making the device more reliable.

The 5KASMC22AHM3_A/H is designed to operate in the junction depletion mode. When a voltage spike occurs, the device\'s gate-source voltage briefly increases, causing the device to enter into a conducting state. When the voltage spike passes, the device reverts back to its non-conducting state. This fast switching ability helps to protect sensitive circuitry from voltage transients.

Conclusion

The 5KASMC22AHM3_A/H TVS diode is an ideal choice for high-current and high-temperature applications requiring over-voltage protection. Its multilayer construction, low capacitance, and low dynamic resistance make it an excellent choice for high-power systems and other sensitive devices. The device\'s Schottky-diode structure also enables it to switch quickly between conducting and non-conducting modes, providing excellent protection against voltage surges and ESD.

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