UC3842BVD1R2

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The UC3842BVD1R2 is a monolithic high-performance pulse width modulation (PWM) switching regulator controller designed to offer optimal efficiency and performance when used to control isolated and non-isolated step-down, step-up and voltage-inverting converters. Utilizing a CMOS process, the single package device offers a wide set of features and enhanced performance, exceeding the high-performance requirements of multiple power supply applications.

UC3842BVD1R2 Application Field

UC3842BVD1R2 is predominantly used in power supply applications as a DC-DC switching controller. Its most common use is to convert AC mains voltage in to DC voltage for powering electronic or any other type of equipment. It\'s also been used in switching architectures for current limiting and feedback control loops, for example, linear regulators. Advantages of switching regulators over linear ones include efficiency, cost and size, so they are also very common in battery charging applications.

It can also be used in motor and solenoid control, as well as motor soft starting and motor current limit applications. It is suitable for automotive applications, like DC-DC power supplies, voltage regulators and motor control applications. and can be used in ATX SMPS designs.

UC3842BVD1R2 Working Principle

UC3842BVD1R2 operates in a wide range of frequencies and its frequency is synchronized to an oscillator frequency. It works as a current mode controller, which means that the output current is monitored by the feedback loop and is constantly kept in check by the internal circuitry. The output voltage is regulated by pulse-width modulation. The duty ratio of the output pulses is directly proportional to the input voltage in order to maintain the output voltage steady.

Since the duty ratio is proportional to the input voltage, the output voltage remains constant and is not affected by changes in the input voltage. Special features like soft start, current limiting, and thermal protection improve the overall performance of the switching power supply.

The UC3842BVD1R2 can be considered more reliable compared to other switching controllers, due to its ability to provide greater protection against overvoltage and undervoltage conditions, as well as advanced internal diagnostics modes. The device also provides better efficiency, better noise control and improved accuracy.

Conclusion

The UC3842BVD1R2 is a high-performance pulse width modulation (PWM) switching regulator controller ideally suited for controlling isolated and non-isolated step-down, step-up and voltage-inverting converters. It is mainly used in power supply applications as a DC-DC switching controller and provides greater protection against overvoltage and undervoltage conditions, as well as advanced internal diagnostics modules for improved efficiency, better noise control, and improved accuracy. It is suitable for a wide range of applications, including motor and solenoid control, as well as motor soft starting and motor current limit applications.

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