LM3880QMFX-1AC/NOPB

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The LM3880QMFX-1AC/NOPB is a highly versatile, quad-channel, monolithic power supply controller from Texas Instruments. It is designed to provide power control and system monitoring capabilities in modern electronic systems, particularly those that are battery-powered. It is ideal for applications including portable computing and consumer electronics, where improved power efficiency and system reliability are key considerations.

Applications

The LM3880QMFX-1AC/NOPB can be used in a wide range of power system applications, including those that require power conversion, voltage steering, and synchronized switching. It is particularly well-suited to controlling step-down buck dc-dc converters, used to efficiently convert higher input voltages to lower output voltages. Due to its quad-channel design, it is capable of providing simultaneous control and monitoring over multiple converter channels, making it ideal for multi-phase applications. As it is designed to operate from a unregulated or nominal 5 V or 3.3 V dc power supply, the LM3880QMFX-1AC/NOPB is suitable for a wide range of power systems, from desktop computers to notebook PCs and portable consumer electronics, where power efficiency and reliability are key considerations.

Features

The LM3880QMFX-1AC/NOPB offers a range of features that enable it to reduce overall system power consumption and facilitate reliable, efficient operation across multiple channels. These features include dual-input, output voltage and current protection, cycle-by-cycle current limit, and thermal protection. Cycle-by-cycle current limit prevents overcurrent conditions from occurring by querying the current state of the output voltage at the beginning of each cycle. In the event of an overcurrent condition, current flows through the inductor, the amplifier and the external current sense resistor until the maximum current limit is reached. Thermal protection is provided by an internal temperature-sensing circuit, which triggers an over temperature signal when the LM3880QMFX-1AC/NOPB rises above a predetermined temperature.

Working Principle

The LM3880QMFX-1AC/NOPB is a highly versatile, monolithic power supply controller. It works by receiving a regulated 5V or 3.3V input voltage and controlling the output voltage via a pulse-width modulation (PWM) waveform. The PWM waveform is generated by a pair of comparators and driving two power MOSFETs. The PWM is used to control the rise and fall of the output voltage and is regulated by an internal DAC which sets the waveform timing and allows the output voltage to be adjusted over a wide range. The LM3880QMFX-1AC/NOPB includes a wide range of protection and monitoring features, such as overtemperature protection, overcurrent limitation, and output voltage and current monitoring.

Conclusion

The LM3880QMFX-1AC/NOPB is an advanced, monolithic power supply controller that is designed to provide reliable and efficient control and monitoring of multiple power channels. It is ideal for controlling step-down buck dc-dc converters, used to efficiently convert higher input voltages to lower output voltages, and is suitable for a wide range of power systems, from desktop computers to notebook PCs and portable consumer electronics. It features a range of protection and monitoring functions that enable it to reduce overallsystem power consumption and improve system reliability.

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