LM1851MX

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LM1851MX is a specialized Power Management Integrated Circuit (PMIC) designed for applications in which load current and operating temperature monitoring is critical. It is optimized to provide precise current sensing accuracy, temperature measurement and over-temperature protection while maintaining low power consumption. This device is suitable for a wide range of applications that require strong power management, such as industrial automation, automotive, medical and consumer products.

The LM1851MX features two output channels and two selectable current ranges, 12-bit resolution (1mA and 5 mA). The device can be used to measure and monitor load current, voltage, and temperature and provide over-temperature protection. It allows for precision, low power current measurement and temperature measurement with low noise. The device also provides an adjustable voltage reference for powering external circuits, allowing for flexibility and customization for each design.

LM1851MX provides two configurable operating modes based on the detected temperature. In the High Temperature Mode, the device can perform temperature-controlled current limiting and current shutdown to avoid over-temperature. In the Normal Temperature Mode, the LM1851MX can perform voltage regulation and step-up/down with readback. This device is also 10-bit programmable, allowing a total of four output ranges (1mA, 5mA, 0V to 0.8V and 0V to 1.2V).

The LM1851MX can be configured to function as a high-performance power management solution in a variety of applications. It is ideal for use in portable and mobile devices, such as smartphones, tablets, digital media players, and other embedded products. It is most commonly used in battery charger, display controller, and system control applications. Additionally, the device can also be used in home appliances, digital metering systems, and automotive applications. The device comes in single package form, is pin-compatible with other power management options, and supports a variety of interfaces.

In terms of working principle, the LM1851MX is controlled by an ARM Cortex-M3 processor which allows for precise measurement, control, and monitoring functions. This processor can send signals to other components in the system in order to control the power management functions. The processor also communicates with an internal 32-bit timer, which can be used for system timing and power management functions such as time-lag options. Additionally, an integrated comparator is used to compare the current and voltage levels with the setpoints that have been defined by the user. For example, if the current reaches a certain limit, the comparator can trigger an over-current protection or current limiting action.

The LM1851MX also offers a wide range of built-in safety features, such as over-current, over-voltage, under-voltage, short-circuit and thermal protection. These safety features ensure that the device will not be damaged due to unexpected voltage or current surges. Additionally, the device also supports low-voltage operation, which allows it to run at a lower voltage, thus reducing heat and current consumption.

In conclusion, the LM1851MX is a specialized power management integrated circuit optimized to provide precise current sensing accuracy, temperature measurement, and over-temperature protection. It is most commonly used in battery charger, display controller, and system control applications, as well as portable and mobile devices, home appliances, and digital metering systems. The device is controlled by an ARM Cortex-M3 processor which allows for precise measurement, control, and monitoring functions. Additionally, the device features a variety of safety features which ensure its reliability and accuracy.

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