LM2745MTC/NOPB

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The LM2745MTC/NOPB is an integrated DC-DC controller. It uses a high-speed synchronous rectifier or multi-phase buck topology to optimize efficiency over a wide load range. The LM2745MTC/NOPB integrates several protection functions required for power supply design, making it a versatile controller. Also, it offers fast transient response, low jitter fixed frequency pulse width modulation (PWM) control scheme, and integrated gate drivers for driving external power MOSFETs. The LM2745MTC/NOPB can easily be configured to operate in a variety of different modes with different load and output voltage requirements.

Application Field

The LM2745MTC/NOPB is suitable for a wide range of applications including computing, network, communication, industrial automation, instrumentation, automotive, and portable devices. For example, it can be used to power microprocessor-based systems, and has additional features such as adjustable output voltage regulation, external auto-restart protection, power saving shut down, and overvoltage protection. Furthermore, a layered interrupt and protection system allows it to safely shut down in the event of an overcurrent, power or temperature fault. It can also be used to control the power supply of a LCD panel.

Working Principle

The LM2745MTC/NOPB DC-DC switch mode controller operated using the synchronous buck topology. In this configuration, an input voltage VIN supplies current through an inductor, generating a magnetic field. The inductor stores energy in the form of this magnetic field, from which a load is supplied with a regulated voltage through a MOSFET switching device. The switching device is turned on and off as needed to regulate the output at a set point.

The LM2745MTC/NOPB uses a Pulse Width Modulation (PWM) control scheme. In this scheme, an internal oscillator produces a pulse train at a determined period. The duty cycle of the pulses can be adjusted and thereby controlling the voltage at the node connected to the inductor. By adjusting the duty cycle of the output pulse, the output voltage can be held at the set point. The clock frequency and duty cycle are adjustable to maximize the efficiency of the system.

The LM2745MTC/NOPB also includes several protection features such as overvoltage protection, overcurrent protection, power saving mode, and short circuit protection. All these features are designed to protect the system and prevent it from operating outside of its limits.

Conclusion

The LM2745MTC/NOPB is a versatile DC-DC controller suitable for a variety of applications. Its high-frequency PWM control, integrated gate driver, and protection functions make it a great choice for many different designs. It is a great controller for powering microprocessor-based systems, and its adjustable output voltage regulation and protection features ensure the integrity of the system.

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