BZX84C7V5W-7

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Diodes - Zener - Single - BZX84C7V5W 7 Application Field and Working Principle

BZX84C7V5W-7, also known as a Zener diode, is a type of diode that acts as a power regulator and voltage reference. Zener diodes have a voltage breakdown voltage that remains stable despite fluctuations in current. As a result, they are specifically used to regulate the amount of power provided by a power source, to protect low-power circuits, and to provide reference voltages for circuits.

The BZX84C7V5W-7 is a 7.0 V Zener diode and is available in a SOT323 surface-mount package. Its breakdown voltage is 7.0 V ± 5 %, making it suitable for applications where precise voltage regulation is required. It has a maximum power dissipation rating of 500 mW, making it suitable for circuits handling medium to large amounts of power.

Main Operating Applications

The BZX84C7V5W-7 is typically used as a voltage regulator and as a reference voltage source in systems such as motor controls and power supplies. Its 7.0 V breakdown voltage makes it particularly suitable for applications where precise voltage regulation is required, such as voltage-sensitive logic circuits and relatively low current applications.

The Zener diode is also used for a variety of other purposes, including stabilizing the output voltage of alternating current (AC) to direct current (DC) converters, creating a reference voltage for voltage regulators, and creating voltage dividers in control circuits. Additionally, the BZX84C7V5W-7 can be used as an ESD protection device in high voltage circuits, as well as in circuit-clamping and wave-shaping applications.

Working Principle

The BZX84C7V5W-7 has a breakdown voltage of 7.0 V ± 5 %. This breakdown voltage refers to the level at which the diode allows current to flow in both directions. This is the voltage at which the diode begins to conduct when there is a forward voltage bias across it.

When the diode is in the reverse-biased condition, it behaves like an open circuit rather than shorting the voltage. This occurs until the voltage reaches a certain ‘breakdown’ level. At this point, the diode begins to conduct in the reverse direction and the voltage drop across the diode remains constant, regardless of the current (hence it’s referred to as a ‘reference voltage’).

In the forward-biased condition, the diode acts like a short circuit and the current is limited only by the series resistance of the diode and the circuit components used.

Conclusion

The BZX84C7V5W-7 is a 7.0 V Zener diode with a breakdown voltage of 7.0 V ± 5 %. It is typically used as a voltage regulator and as a reference voltage source in systems such as motor controls and power supplies, as well as for AC to DC conversion, voltage regulators, voltage dividers, and ESD protection. The diode operates by allowing current to flow in both directions when the voltage reaches a certain ‘breakdown’ level, and its voltage drop across the diode remains constant regardless of the current.

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