AZ23B12-E3-18

Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Configuration:	1 Pair Common Anode
Voltage - Zener (Nom) (Vz):	12V
Tolerance:	±2%
Power - Max:	300mW
Impedance (Max) (Zzt):	20 Ohms
Current - Reverse Leakage @ Vr:	100nA @ 9V
Operating Temperature:	-55°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23

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Introduction

The AZ23B12-E3-18 is a type of Zener Diode Array, or simply, a Zener Array. Zener Arrays are special devices that contain numerous electrical components to provide specific characteristics or abilities. In general, they are most commonly found in applications that involve a variety of signals, such as analog, low-level, and controlling signals.

Types of Zener Arrays

There are three main types of Zener Arrays, namely the homopolymer, heteropolymer, and compound polymer. The homopolymer is composed of identical electrical components, and is commonly used for low-level signals. Heteropolymers have different components, primarily to increase the Zener\'s Current Handling Capability (CHC), and are used to control mid and high level signals. Lastly, compound polymers are composed of heteropolymer and homopolymer components and is used in high power control applications.

The AZ23B12-E3-18

The AZ23B12-E3-18 is a broad-range Zener Array, which is suitable for various applications, from low level signals to mid- and high power control applications. It is comprised of four Zener diodes, each with a rating of 12 volts, 1µA, and an extremely-short reverse recovery time of 20µs at 25°C. The AZ23B12-E3-18 is constructed from a compound polymer of heteropolymer and homopolymer components, allowing it to handle both low-level signals and high-power applications. Its broad-range capability, fast switching speed, and low leakage current all make it an ideal component for many applications.

Applications

The AZ23B12-E3-18 can be used in a variety of applications, including active bandgap references, logic control circuits, class E power amplifiers, sensed capacitive-loaded regulators, buck controllers, and class B amplifiers. It can also be used in automotive as well as aviation electronics. In bandgap references, the AZ23B12-E3-18 provides stable voltages of up to 12 V in short recovery times, which enhances the accuracy of analog-to-digital converters. Furthermore, with its current handling capability and fast switching speed, it is perfect for controlling mid and high level switching applications, such as motor controllers and LED drivers.

Working Principle

The AZ23B12-E3-18 works by having its four Zener diodes connected in series. When a voltage is applied across the entire array, the Zener diodes act as semiconductors and block the current flow, until a preset voltage is reached, at which point the Zener diodes break down, allowing the current to flow. The breakdown voltage is determined by the value of the Zener diodes, and each diode has its own specific voltage rating. Due to the presence of the heteropolymer components in the AZ23B12-E3-18, the current handling capability of the device is greatly increased. This is due to the presence of \'interstitial\' silicon in the array, which acts as a buffer to reduce the forward voltage across each Zener diode. In addition, the heteropolymer elements also allow for faster switching speeds, as the reverse recovery time can be reduced by up to 20 µs.

Conclusion

In conclusion, the AZ23B12-E3-18 is a compound polymer Zener Array, composed of four 12 V, 1 µA Zener diodes. It is suitable for a variety of applications, ranging from low level signals to mid- and high power control applications. Furthermore, due to the presence of heteropolymer elements, it has increased current handling capability as well as faster switching speeds, making it ideal for controlling various applications.

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