MC34268DR2

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The MC34268DR2 is a High-Side Switching Regulator from ON Semiconductor, designed to overcome a limited power supply\'s inability to provide enough power for the associated load. It is a very useful tool to have in situations where there is an overcurrent or undervoltage condition. This device can be used in a variety of applications, and this article will discuss its application fields and working principle in detail.

Application Fields

The MC34268DR2 is typically used in automotive systems, general purpose industrial equipment and computer applications. In automotive systems, it is used to provide an isolated power supply to water pumps, fans, lighting, ignition and other electronic components. In industrial segments, it can be used to power brushless DC motors, automated weigh scales and other industrial equipment. In computer applications, the MC34268DR2 is used to provide a regulated power supply for the CPU, MEMS, ICs and other computer components.

It can also be used in medical equipment, such as pain relief pumps, infusion pumps and medical displays. The device is CE and RoHS compliant, making it desirable in medical applications where a safe, reliable power is needed for accuracy and to protect users’ safety.

Working Principle

The MC34268DR2 features a high-side driver that is connected to a bipolar junction transistor array. This array is used to switch the amount of power provided to the load. A gate driver IC is connected to the BJT array, and its main function is to control the switching process of the BJT. In the output section of the device, an adjustable voltage regulator is used to regulate the output voltage. The operational amplifier is connected to the output to monitor the output voltage, and this is used by the MC34268DR2 to determine when to switch.

The MC34268DR2 also features both overcurrent and overvoltage protection. An hardware timer (watchdog) is integrated in the device, making it suitable for handling large amounts of power. This timer ensures that the device continuously operates at the required voltage and current. Finally, the device also comes with a PWM controller to regulate the output voltage.

Conclusion

The MC34268DR2 is a high-side switching regulator with a wide range of application fields. It is used in automotive systems, general purpose industrial equipment and computer applications. Its features such as overcurrent and overvoltage protection, adjustable voltage regulator, hardware timer and PWM controller make it a desirable choice for power regulation. The device is also compliant with CE and RoHS standards, making it suitable for medical applications as well.

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