ATV30C800JB-HF Circuit Protection

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Transient Voltage Suppression (TVS) diodes are a type of diode that is specially designed to protect sensitive electronic components, such as PCBs, from voltage surges and electrostatic discharges (ESD). The ATV30C800JB-HF is one such device that can be used to protect components from high voltage transients, as well as provide noise immunity.

When a transient voltage spike is encountered, either from an ESD event or from a power surge, the diode will rapidly conduct the excessive current away from the sensitive components. TVS diodes are designed with a reverse breakdown voltage around which the diode will cutoff, allowing no further increase in current. This prevents damage to the underlying component by diverting the extra current away.

The ATV30C800JB-HF is a Uni-directional TVS diode, meaning it is designed to protect against voltage spikes in only one direction. This can be achieved by having plates with different doping levels. The positive plate is heavily doped, and the negative plate is lightly doped. This creates a “potential barrier”, which increases in resistance to current flow until the peak breakdown voltage is reached.

At this point, the diode rapidly allows current in order to protect the component. Because the transient voltage is fleeting, the diode is able to restore normal current flow in a relatively short time frame. This is because the heavy doping of the positive plate results in an avalanche breakdown, which creates a fast transition from high resistance to low resistance, allowing the reverse current to pass through rapidly.

The ATV30C800JB-HF is commonly used to protect FPGAs, microprocessors, and motherboards from electrostatic discharge events. It can also be used to buffer voltage from a direct power source. The device has a peak pulse power of 800W (8/20 microsecond pulse width), a peak reverse voltage of 30V, and a working voltage of 14V-21V. It can also handle a surge current of 600A (8A max. at 16V).

The ATV30C800JB-HF is specially designed to have a low clamping voltage rated at 15.2V (8/20 μs pulse width). This low clamping voltage is especially useful for protecting fragile components from voltage spikes. The device also has quick stand-by recovery time, allowing for relatively rapid return to normal current flow. In addition, it features low leakage current, low capacitance, and low internal power loss.

In conclusion, the ATV30C800JB-HF is an ideal TVS diode for protecting sensitive components from transient voltage surges and ESD. It has a low clamping voltage, quick standby recovery time, low leakage current, low capacitance, and low internal power loss. This makes it an optimal choice for FPGAs, microprocessors, motherboards, and other electronic components that need protection from voltage spikes.

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