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MMBZ5225BS-7-F application field and working principle

The MMBZ5225BS-7-F is a dual Zener diode array chip and is part of the Zener-Diode Array family from Diodes Inc. It includes two integrated Zener diodes with a breakdown voltage of 5.2V each and 400mW of power dissipation. The device is rated for -55°C to +175°C junction temperature and is available in surface mount and through hole packages.

Application Field

The MMBZ5225BS-7-F is mainly used for providing a reference voltage for linear regulators, reverse supply protection and protecting circuits against voltage surges. It is also used as an anti-ESD protection device for semiconductor packages, as a clamp diode for protection against ESD and as a voltage isolator.

Working Principle

The MMBZ5225BS-7-F is a Zener diode array that consists of two individual Zener diodes in series. It is designed to provide a constant reference voltage when connected in series with another device, such as a linear regulator or a voltage limiter. The constant reference voltage is independent of changes in temperature or current as long as the power dissipation is maintained within the device\'s ratings.

The device consists of two diodes with a common cathode terminal. The anode terminals are connected to each other and are both connected to the output of the circuit. The output voltage is determined by the Zener voltage of the diodes. The Zener voltage of the diodes is maintained by the built-in Zener breakdown voltage of the diodes. The Zener breakdown voltage of the diodes is determined by the manufacturing process and is generally within the specified tolerances.

The device also has a very low junction capacitance which helps reduce power dissipation. This helps the device to maintain its output voltage even under high frequency applications. As the power dissipation increases, the thermal resistance of the device also increases and helps to reduce power dissipation.

In conclusion, the MMBZ5225BS-7-F is an ideal solution for providing a constant reference voltage in a variety of applications. It is a cost-effective device that can handle temperature and current changes while providing a reliable reference voltage.

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