MAPLAD6.5KP45CAE3 Circuit Protection

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Transient Voltage Suppressors (TVSs) are electronic devices consisting of semiconductor diodes in an anode, cathode, and gate configuration, used mainly to protect circuits from transient voltage such as a surge, spike, ESD, or electrostatic discharge. TVSs are commonly known as ‘clamps’, ‘surge protectors’, or ‘spike limiters’. The MAPLAD6.5KP45CAE3 is a TVS, a device used to protect electronic circuits and components from transient voltage surges.

Introduction & Application

The MAPLAD6.5KP45CAE3 is a Transient Voltage Suppressor (TVS) diode designed for automotive applications. It is a unidirectional (one-way) device, meaning it conducts current in one direction only. The device is specifically designed to protect low power automotive circuits from transient voltage, such as overvoltage, ESD, or electrostatic discharge. The MAPLAD6.5KP45CAE3 is a stand-alone, discrete device, designed to operate in 6.5V to 45V applications, and it can withstand ESD pulses up to 80kV (level 4) per the IEC 61000-4-2 standard.

This device is suitable for a wide variety of automotive applications including - but not limited to - powertrain control, body control, lighting systems, and engine management. Many automotive applications require protection against transient voltage, and the MAPLAD6.5KP45CAE3 offers an effective solution.

Design & Working Principle

The MAPLAD6.5KP45CAE3 is a unidirectional, planar array device containing two diodes with a common anode (positive terminal) and two common cathodes (negative terminals). In addition, the device has a gate (control) terminal. In normal operating mode, the anode is connected to the positive supply and the cathode is connected to the protected circuit load. When design voltage exceeds the threshold of the protection diodes, the device opens up and the current flow is stopped.

When a transient voltage surge (or ESD event) is detected, the voltage produced across the two diodes is compared and the higher one is registered as the voltage to be clamped. The voltage is then compared to the breakdown voltage (Vbr) of the device diode. While the voltage is lower than the breakdown voltage, the diodes are off. However, if the voltage exceeds the breakdown voltage, the device switches on and the current flows through the junction.

When the voltage is higher than the breakdown voltage, the MAPLAD6.5KP45CAE3 protects the load from the harmful effect of transient voltage by dissipating the energy of the voltage spike. The gate (control) terminal is also used to control the performance of the device, acting as an additional control element. When the voltage surges are detected, the gate terminal is closed, controlling the device switch and allowing the device to absorb the voltage spike.

Conclusion

The MAPLAD6.5KP45CAE3 is a unidirectional Transient Voltage Suppressor (TVS) suitable for low power automotive applications. The device is designed to protect circuits from transient voltage such as a surge, spike, ESD, or electrostatic discharge. It can withstand ESD pulses up to 80kV (level 4) per the IEC 61000-4-2 standard. The MAPLAD6.5KP45CAE3 offers an effective protection for many automotive systems including powertrain control, body control, lighting systems, and engine management.

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