LC45A

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The LC45A is an unidirectional electrostatic sensitive device used in low voltage transient protection applications. It is a TVS (Transient Voltage Suppressor) diode, capable of limiting short-circuits, high voltage transients, and over-voltage to ground, offering an additional layer of load protection. It\'s configurable, making it highly adaptable for a wide variety of applications. This article will aim to discuss the LC45A’s application fields and working principles.

Applications

Due to its transilacy characteristic, LC45A can be used in a variety of electronic components. It provides fast and reliable protection against extreme voltage and current transients in applications like restraint systems, door locks, and other automotive appliances. It is also often utilized in audio systems, mobile phones, cameras, PCs, and other consumer and industrial electronic products – even mains-powered systems such as mains power supplies, medical equipment, and business machines.

Due to its high surge-handling capability and low on-state impedance, it can be easily combined with other components, like varistors, to provide a safer powering environment on both static and transient conditions. It is the perfect protection component for applications where a high transient voltage protection level is required.

Working Principle

The LC45A is a unidirectional TVS diode, with a single anode and several cathodes. It has a low breakdown voltage, making it ideal for transient voltage protection. When an overvoltage is applied, the diode limits the voltage and rises its own internal resistance, safely dissipating the excess energy.

The design of the LC45A follows a single-peak response mechanism, limiting the high voltage transients and short-circuit events. When the transient voltage surpasses the device\'s specified clamping voltage, its internal silicon oxide junction breaks down, diverting the excess current away from the system components. This mechanism allows for a fast response, allowing the diode to protect electronic systems from very fast transients.

The diode can also limit the energy to a safe level in high energy transients, meaning the system is only exposed to a moderate level of voltage and current. Due to its low clamping voltage, combined with its high supraconducting capacity, the diode provides extremely fast response and protection, protecting the most sensitive components from damages.

Conclusion

The LC45A is a unidirectional electrostatic sensitive device used in low voltage transient protection applications. It is a versatile component, used in a variety of electronic appliances like mains power supplies, consumer electronics, audio systems, and automotive components. Due to its single-peak response and low breakdown voltage, the diode can offer superior protection from short-circuit and over-voltage events, while still being able to provide fast and reliable transient voltage protection.

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