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PMIC - Supervisors

PMICs, or Power Management Integrated Circuits, are chips used on electronic circuits and systems to control output power and scheduling of the power flow to devices that need it. They are used to monitor and control voltage flow, current flow, and devices state during operation. Supervisors are types of PMICs used to guard against system faults such as short circuit, thermal overload, reverse polaritiy, supply jump, and overvoltage by monitoring voltage and current levels throughout the system.

The MCP120-270HI/TO is a special type of supervisor with two main application fields, one as an independent main power supervisor, and the other as an integrated supervisor. It is a voltage-monitored and thermosense supervisor with an adjustable threshold voltage level and extended temperature range that is optimized for settings related to power loss in automotive and industrial applications.

Working Principle

The MCP120-270HI/TO supervisor monitors the input voltage level, and when the programmed threshold voltage is exceeded, its internal logic will activate its output, which is enabled by a built-in logic circuit. The output is active low, which means that the output is off when the input voltage is within its set limits, and activates when the threshold is exceeded. This process is hidden from the user, providing a reliable and efficient means to prevent short-circuit and reverse polarity faults.

The MCP120-270HI/TO also has a thermosense function that detects an excessive temperature within the device, and shuts down the system before overheating or fires occur. This is accomplished through a temperature-sensing element in the supervisor. When the temperature exceeds the set limit, the output of the supervisor gets turned off, and the device will reset once the temperature has settled within the safe range. This process helps to ensure the safety of the connected materials and circuit.

Application Fields

The MCP120-270HI/TO can be used as an independent main power supervisor and as an integrated supervisor. As an independent main power supervisor, it is typically used to monitor the power supply voltage levels, and prevent short circuits and reverse polarities from occurring. It can be used in both automotive and industrial applications. In automotive applications, it is widely used for battery monitoring, solar panel monitoring, car alternator monitoring and many other power-related systems.

As an integrated supervisor, the MCP120-270HI/TO is mainly used on embedded systems, such as single board computers, industrial and medical equipment, small controllers, and other device-level applications. It functions similarly to the independent main power supervisor, but requires the user to integrate the supervisor directly into the device’s circuit, with all of its active components connected directly to it, in order to function properly.

Conclusion

The MCP120-270HI/TO is a voltage and temperature monitored supervisor. It has two main application fields, one as an independent main power supervisor and the other as an integrated supervisor, both with extensive uses in automotive and industrial applications. Its thermosense feature helps to prevent overheating or fire hazards, while its voltage monitoring feature guards against short circuits and reverse polarities, thus providing a secure and reliable power management system.

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