TPS3808G12DBVTG4

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PMIC - Supervisors are electronic components that are used to provide power supply protection and distributed, to monitor the power supply and signals in a computing system. The TPS3808G12DBVTG4 PMIC - Supervisor device is an example of this type of component, and in this article we will explore more about its application fields and basic working principles.

The TPS3808G12DBVTG4 device is a system power supply supervisor from Texas Instruments, designed for integrated circuits to be used in system power management. It assists in monitoring a single supply voltage, operating from 2.6 V to 6.5 V, and is then able to detect when that voltage deviates above an adjustable voltage threshold. The device features an active-low RESET output, nRESET input and a VREF pin, which is used to regulate the voltage levels being monitored by the supervisor and activate interrupt signals. This device also utilizes an 8-pin MicroPack package.

One of the primary applications of the TPS3808G12DBVTG4 is as a circuit protector, protecting systems with a hanging or stuck power supply also known as a brown-out. This device can also be used in computer systems where the power supply must be monitored closely, such as notebooks and embedded systems like routers, set-top boxes, and gateways.

In terms of its working principles, the TPS3808G12DBVTG4 is designed to act as a voltage detector, where a specific input voltage level is monitored in order to trigger different actions. For example, when the voltage for one circuit becomes lower than the pre-configured threshold, the supervisor will then trigger a reset signal, which helps protect the system from a brown-out scenario.

The first step to enable the device is to connect the TPS3808G12DBVTG4 to the power source and then set up the adjustable voltage. This is done through the VREF pin, which should always be connected to a reference voltage. This reference voltage acts as a reference point, and when it’s certain that the input voltage varies from this voltage, the device will trigger a reset signal. This signal can then be used to bring the power supply back to a normal working range.

The TPS3808G12DBVTG4 component is also equipped with two comparators, which act as the main sensing elements and detect any abnormalities in the power supply. The device also includes two Schmitt triggers, working in conjunction with the comparators, used to debounce the power supply and prevent high-frequency noise interferences or false positive signals.

The last component of the device is the active-Low RESET pin, which is used to indicate whether the input voltage is out of the predefined threshold range. When the device detects that the input voltage is lower than the pre-configured voltage, the RESET pin will become active, providing the reset signal for the power supply and protecting the system from any power supply related issues.

In conclusion, the TPS3808G12DBVTG4 is designed to monitor the power supply and signals in a computing system, protecting it from voltage deviations. It acts as a voltage detector that can trigger reset signals when the input voltage becomes lower than the adjustable voltage threshold, and it also includes two Schmitt triggers which help to ensure accurate detections. As such, the TPS3808G12DBVTG4 makes an excellent component for protecting embedded systems and other circuit applications.

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