MIC811SUY-TR

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	2.93V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	TO-253-4, TO-253AA
Supplier Device Package:	SOT-143
Base Part Number:	MIC811

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Introduction to MIC811SUY-TR Application Field and Working Principle

The MIC811SUY-TR is a battery-monitoring device specifically developed for the automotive industry. As a member of the Microchip MicroMonitor™ family of power management ICs, the MIC811SUY-TR is a low-power device capable of providing accurate and reliable measurement of battery voltage, current and temperature for monitoring and protecting automotive electrical systems. The MIC811SUY-TR benefits from the integration of many popular features into a single device such as monitoring, protection and system reset, providing designers with a single, cost-effective package. The device is configured to operate from a 12 V lead-acid or lithium battery, and can be used to monitor a 12 V battery connected to a 12 V lead-acid, a 12V Li-Ion, or a 24V lead-acid battery.

Overview of MIC811SUY-TR Features

The MIC811SUY-TR offers a number of features that allow the design engineer to achieve accurate, reliable and cost effective monitoring of automotive electrical systems. It has multiple pin-selectable features, including a battery voltage monitoring range of 4.5V to 15V, adjustable current monitoring threshold (over- and under-current at 200 mA to 20A), temperature sensing (NTC 10KΩ/ 50Ω), auto reset/holding/latching isolation, and changeable thresholds for over and under voltage, over and under current, and over temperature protection. The MIC811SUY-TR also includes an optional on-board EEPROM, which can be programmed to contain user-defined data or parameters such as thresholds, run-time status, etc. This memory can be utilized for system monitoring, fault detection and diagnostics. This feature also allows for customization of system parameters and implementation of user-defined functions for specific applications. In addition to monitoring and protection features, the MIC811SUY-TR also has an accurate voltage and current sampling circuit, allowing designers to sample the system’s voltage and current without the need of external components.

How the MIC811SUY-TR Works

The MIC811SUY-TR is a battery-monitoring IC which functions as a supervisor for monitoring the status and condition of a battery system. It can be used to monitor multiple voltages, current and temperature in a variety of applications. The device contains two integrated circuits, an amplifier and a comparator; each has its own set of input pins connected to the positive and negative inputs of the battery. The amplifier is used to sense the electrical signals in the battery and convert them into an analog voltage and current values. The amplifier has three pins, the closed loop input (VCL), high impedance output (VO), and ground (GND). The VCL pin is used to measure the input voltage, while the VO pin is used to measure the output voltage. The comparator is used to compare the input voltage to a reference voltage. It has a reference voltage pin (VREF) where the reference voltage is set, and an input pin (IN) where the actual input voltage is measured. When the voltage exceeds the reference voltage, a signal is sent out on the output pin (OUT). This signal is used to indicate an overvoltage or undervoltage condition in the input voltage.The MIC811SUY-TR also contains an internal temperature sensing circuit, which is used to detect the temperature of the battery. The temperature of the battery is monitored and when the temperature exceeds the set threshold, an alarm is triggered. This alarm can be used to indicate an overheat or over temperature condition and can be used to shut off the power supply to the battery.

Conclusion

The MIC811SUY-TR is a low-power PMIC, specifically designed for the automotive industry. It offers a wide range of features and functions, such as adjustable current and voltage monitoring, temperature sensing, auto reset, latching, and on-board EEPROM memory. In addition, the device also provides accurate voltage and current sampling, which eliminates the need for external components. Thanks to its powerful features, the device is ideal for monitoring, protecting and resetting various automotive electrical systems.

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