MLCE22A

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TVS – Diodes can be used to provide a protective function. A TVS diode is a thyristor-based device, designed specifically to offer over-voltage protection. In particular, the MLCE22A is a transient voltage suppressor that’s designed to protect circuits against the damaging effects of electrostatic discharges, such as lightning strikes or high voltage spikes created when two conductors touch. It’s physical dimensions make it well-suited for space-constrained devices where an effective and reliable ESD protection is required.

The MLCE22A comes packaged in VDFN and lead-free SOD-523 cases and uses planar technology to provide ESD protection. It has a maximum breakdown voltage of 6.5 V, a maximum clamping voltage of 12 V, and a maximum let-through energy of 2.1 mJ. It also has a highly symmetrical clamping behavior of both positive and negative surge pulse and an excellent leakage current of less than 0.1 μA at 6.5 volts.

The MLCE22A has a wide range of application fields. It can be used in high voltage systems, data acquisition systems, communication systems, computer equipment, as well as in other areas where over-voltages could potentially damage circuit components. For example, it can be used in applications such as high-voltage power supplies, RF transmitters, and energy meters.

The working principle of the MLCE22A is analogous to that of a movable barrier, which is triggered through its gate terminal. A visible current flows through the gate terminal, causing an avalanche breakdown in the PN Junction and a sharp rise in the voltage across it. This causes the device to start conducting. The device has a certain capacitance which then charges the gate and prevents it from conducting further. The device stops conducting only when the applied voltage falls below the breakdown voltage.

This mechanism is effective in preventing overvoltages from damaging circuits, and can provide a measure of protection against destructive surges. The device is most effective when installed between a data line and ground, and can be used for both low frequency-impulse protection, as well as radio frequency protection.

The MLCE22A from Panasonic brings a highly effective ESD protection, coupled with a low leakage current that allows its use in more sensitive and precise circuits. Its compact size makes it easy to fit inside space-constrained designs, such as portable electronics, and its broad range of application fields makes it suitable for a wide range of applications.

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