SSM2212RZ

SSM2212RZ Application Field and Working Principle

Introduction

The SSM2212RZ is a Bipolar Junction Transistor (BJT) Array that provides a high-performance discrete solution for high-level switching and control applications. It is an integrated device consisting of two PNP transistors operating as an array. The transistors share control characteristics for simplified selection and improved performance. This array provides a low level of electrical noise and higher thermal stability compared to using two separate transistors.

Features

• Low output voltage on both NPN and PNP outputs.
• Two different equal collector currents in the output stages.
• High speed switching of both terminals.
• High input-output isolation.
• Low power consumption.
• Internal resistances.
• Available in small packages.

Typical Applications

The SSM2212RZ can be used in a variety of applications, including switch mode power supplies, motor control, heating control, and lighting control systems. It can be used in applications where two collectors are required to achieve the same current in the output, and it can be used to isolate two independent control inputs.

Working Principle

The SSM2212RZ is an array of two separate PNP transistors. Each transistor is connected to its own output. When the input is high, the two transistors will be biased in the forward direction, causing the collector current to flow from the emitters to the collectors, depending on the resistance between the emitters and the base. The voltage across the collector resistance will be roughly equal to the input voltage minus the threshold voltage of the device.

This voltage then determines the magnitude of the current that will flow through the device. The current levels are dependent on the base-emitter resistance and the base-collector resistance. As the input signal changes from low to high, the output voltage will also change from low to high. The output voltage can be controlled by the size of the resistors in the circuit. The speed of switching of the device is dependent on the characteristics of the transistors and the speed at which the input signal changes.

Conclusion

The SSM2212RZ is a Bipolar Junction Transistor (BJT) Array that provides a high-performance discrete solution for high-level switching and control applications. It provides low output voltage on both NPN and PNP outputs, high speed switching of both terminals, and a high input-output isolation. It is suitable for use in switch mode power supplies, motor control, heating control, and lighting control systems.

The SSM2212RZ works by two PNP transistors being biased in the forward direction when the input is high. The collector current then flows from the emitters to the collectors depending on the resistance between the emitters and the base. The output voltage is then determined by the input voltage minus the threshold voltage of the device and by the size of the resistors connected in the circuit.