LM1851M/NOPB

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Power management integrated circuits (PMICs) are integral components of most electronic devices. They are designed to regulate voltages, control current, and provide various protection functions to prolong the life of the device and its components. LM1851M/NOPB is one of these PMICs that provides specialized power management applications.

LM1851M/NOPB features a high-speed switching regulator with low power consumption ideal for supplying low voltage power in portable devices such as automotive, smartphone, and consumer electronics. It is used to provide switching power supplies to LCD screens, cameras, and audio systems for continuous operation. It offers a wide input voltage range of up to 36V. It has a wide operating temperature range of - 40°C to +85°C. It has a maximum output current of 3A, a switching frequency of 500KHz, and a discharge current of 10mA. It also offers over-temperature, under-voltage, and over-current protection. It is provided in an 8-pin, thermally enhanced package for easy mounting.

The working principle of LM1851M/NOPB involves the use of an oscillator, an inductor, and a power switch. The oscillator generates a specified frequency of square waves that controls the power switch. The power switch is driven by an output voltage feedback control terminal. When the output exceeds the threshold, the power switch is opened and the inductor’s current flows through the power switch to ground. The current decreases and a new cycle begins. This process is repeated and the output voltage is kept regulated. The schematic diagram illustrates this working principle.

LM1851M/NOPB has applications in automotive infotainment systems, LCD screens, digital cameras, and audio systems. It is used to regulate power supply to these components to ensure continuous operation. It can also be used in portable devices requiring low voltage power such as smartphones and personal digital assistants (PDAs). This PMIC can also be used in communication equipment and computing systems.

In conclusion, LM1851M/NOPB is a specialized PMIC designed for high-speed switching applications and with various protection features. It is used in automotive infotainment systems, LCD screens, digital cameras, audio systems, and portable electronics. Its working principle involves the use of an oscillator, an inductor, and a power switch to regulate the output voltage.

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