TL3845DR

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The TL3845DR is a dual DC-DC controller integrated circuit that offers a wide range of features for controlling DC-DC switching regulators. The device incorporates two internal synchronous rectifiers and two adjustable current limit circuits. Additionally, the device features low-side switching for enhanced system protection. In this application, the TL3845DR is designed to provide a power source for communication applications.

The TL3845DR offers a versatile output voltage capability from 0.05V to 28V which is suitable for most power management applications. Furthermore, the device integrates a high-side drive circuit with low-side PWM controller, which dramatically reduces the design complexity and allows for quick implementation of a DC-DC switching regulator. Additionally, the integrated pulse-by-pulse current limit feature further simplifies the design. The device also includes over temperature protection, under voltage lockout and adjustable soft start.

The TL3845DR supports a wide input supply range from 9V to 28V, making it an ideal choice for configuring voltage converters. The device also provides a wide range of output currents up to 5A with fast transient response.

The working principle of the TL3845DR is based on a fixed frequency PWM control technique. The power switches are driven via a timing signal, generated by the internal oscillator. The operating frequency can be adjusted through the external frequency setup pins, depending on the application requirements. The feedback loop is used for controlling the output voltage, by adjusting the duty cycle of the pulse width modulated signal.

In summary, the TL3845DR is a versatile DC-DC switching controller suitable for a wide range of power management applications. Its adjustable setup pins, wide input voltage range and fast transient response make it an ideal solution for powering communication systems. The fast PWM control technique and easy implementation make it a convenient choice for configuring voltage converters.

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