APX809S-46SA-7

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APX809S-46SA-7 is a device that fits within the category of PMIC - Supervisors. It is a three-terminal, 900V Supervisory Circuit with an integrated N-channel MOSFET. The APX809S-46SA-7 is designed to provide a reliable, low-cost device to monitor system/battery/supercap voltage. It continuously monitors the voltage on its auxiliary input pin, VDD and VBAT, and shut down the system if either voltage falls below its predetermined threshold.

Application Field

One of the primary applications for the APX809S-46SA-7 is as a supervisory circuit for VDD and VBAT power supplies. It is ideal for servicing power supplies with a wide range of voltages, from 3.0 to 24V. It is also well suited for use in battery-powered systems, where it can be used to monitor battery voltage and shut down the system in the event of low battery voltage or over charging. Additionally, it can be used in supercapacitor-based systems to monitor and protect the voltage on the supercapacitor.

The APX809S-46SA-7 can also be used as an over voltage protection circuit. It features an integrated N-channel MOSFET, enabling it to be used as a precision power switch. When used in this configuration, it can provide overvoltage protection against surges or source overvoltage from external sources.

Working Principle

The APX809S-46SA-7 operates on a three-terminal configuration. The VDD terminal is connected to the system power supply, while the VBAT terminal is connected to the battery or supercapacitor. The AUX terminal is connected to the system, and is used to monitor the voltage on the VDD and VBAT terminals.

When the voltage on the VDD or VBAT terminals drops below a predetermined threshold, the APX809S-46SA-7 will cut off the power supply to the system. If a surge or overvoltage is detected, the APX809S-46SA-7 will activate the integrated N-channel MOSFET and divert the overvoltage away from the system.

The APX809S-46SA-7 is a low-cost, reliable device for monitoring system/battery/supercap voltage and providing protection from overvoltage events. It is ideal for a wide range of applications, including battery and supercapacitor-based systems, and for providing overvoltage protection for VDD and VBAT power supplies.

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