LM2576-12WU-TR

LM2576-12WU-TR is a member of the versatile LM2576 Series of DC/DC switching regulators. This device is designed to provide an efficient, low-cost solution to regulating an input voltage source of between 6V and 30V to an output voltage of 12V, with a maximum current of up to 1A. It is protected by a wide range of features such as overvoltage protection, thermal shutdown, and current limiting. These features ensure that the device has a long life and is able to handle any challenges that may arise in its application.

Application Field: The LM2576-12WU-TR is predominantly used in industrial, automotive, consumer, and other operations. It can be used to regulate and control the input voltage into a system or device, such as a PLC or sensor. It is also used in applications where a stable output voltage is required, such as battery chargers. The device can also be used for general purpose power supply regulation.

Working Principle: The LM2576-12WU-TR works on the principle of pulse width modulation (PWM). It consists of an internal fixed-frequency oscillator, an internal voltage reference, and two output transistors. When the input voltage is applied, the oscillator begins to generate PWM pulses at a fixed frequency, which are applied to the gates of the two output transistors. The output transistors switch on and off at this frequency, depending on the duty cycle of the pulses. The duty cycle is set by the internal voltage reference and the input voltage, thus regulating the output voltage. This action continues until the output voltage is equal to the input voltage.

In addition to the PWM action, the LM2576-12WU-TR also features a variety of features that are designed to protect the device from damage and to enhance its performance. These features include thermal shutdown, current limiting, and overvoltage protection. The thermal shutdown feature ensures that the device does not overheat by shutting off the output transistors if the device exceeds a certain temperature limit. The current limiting feature prevents the device from being overloaded by reducing the output current if the load placed on the device exceeds the maximum rating. Finally, the overvoltage protection feature ensures that the output voltage does not exceed a certain threshold by shutting off the output transistors.

By combining these features with the efficient control of the LM2576-12WU-TR, designers can be sure that their system or device is being powered by a reliable and robust power converter. The device is well-suited for a wide range of applications and offers an ideal solution for battery chargers, PLCs, sensors, and other general-purpose power supplies.