LM2747MTC/NOPB

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LM2747MTC/NOPB, one of the power management integrated circuit (PMIC) systems, belongs to DC DC switching controllers, which are under the Voltage Regulators category. It is suitable for various applications due to its numerous features, and here we will mainly discuss about its application field and working principle.

Application Field

Designed for advanced power management applications, this chip can be used for providing the power supply of mobile computing systems, video modems, and many more portable devices. It also can be broadly applied to wide voltage range applications such as intermediate bus conversion, power factor corrections and many more. It supports high current control, providing over-current protection as well as to monitor the thermal stability of the entire setup. Moreover, the output voltage can be maintained by adjusting the PWM dimming control which can vary between 0V and 5.5V. It also offers high power density, wide input voltage range and high efficiency.

Working Principle

The LM2747MTC/NOPB is designed around a standard switched mode power supply circuit. The main components consist of an inductor, a diode, an FET transistor and a capacitor. The oscillator controls the switching of the FET which in turn regulates the current flow from the supply to the output. The waveforms of the input voltage, the output voltage and the FET are compared to determine the switching requirement of the FET.The current is controlled by maintaining a constant duty cycle of the oscillator. The duty cycle can be adjusted with the help of an external resistor. This duty cycle adjustment is used to regulate the output voltage. The output voltage is also determined by the source and the load, which can be easily adjusted depending on the requirement. It also offers additional features such as over-voltage protection, fault protection, TON/OFF_delay and temperature compensation.

Conclusion

Invoking the power of superior control, enhanced protection and wider application range, the LM2747MTC/NOPB is suitable for power management systems and advanced power supply conversion applications. The chip offers numerous advantages such as adjustable duty cycle and variable input and output voltages. The chip also provides over-voltage protection, fault protection, TON/OFF_delay and temperature compensation.

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