MAX6823WUK+T

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The MAX6823WUK+T Supervisory Circuit from Maxim Integrated is a compact, highly integrated power shutdown and reset solution for a wide range of system applications from low power embedded and portable products to large Scale industrial systems. This article will cover the applications and working principles of this Supervisory circuit.

Application Field

The MAX6823WUK+T Supervisory Circuit is a highly configurable solution for monitoring supply voltage, resetting the system, and providing time-delayed power-on reset. It can be used in systems requiring to consider both standard and extreme cases, such as high-altitude, high temperature, and much more. It is a highly suitable solution for use in maximally efficient systems, especially those which are located in field, where energy supply has to be completely reliable.

The Supervisory circuit provides a constant voltage supply and includes regulators and voltage supervisors for monitoring failsafe state. It also provides a means for real-time initialisation and reset of the onboard logic with an intelligent power-up reset feature. The circuit has the ability to threshold and time multiple power sources and automatically enables system on state. The circuit can also trigger a reset upon detection of an overvoltage condition, or a manual reset.

The MAX6823WUK+T is also suitable for monitoring batteries where it is essential to know when they get dangerously low, and also provides power-on reset delay times that can be manually adjusted. It is capable of resetting both analog and digital electronics, and is suitable for a range of low power embedded system applications.

Working Principle

The MAX6823WUK+T Supervisory Circuit monitors two sets of power supplies, and provides a reset if either one of them falls below their respective reset thresholds. It has three low-power regulator- and controller-based function blocks – (1) automatic power-on reset (POR), (2) overvoltage protection (OVP), and (3) battery-saver (BS). These blocks give the device flexibility to cover different system requirements and environments, without additional components.

The supervisory circuit has an input voltage range of 3V to 12V, and provides a delay time of 100 m sec up to 4 sec, with adjustable reset thresholds and output delay. The device is equipped with built-in end-of-charge (EOC) logic, and high-speed OVP detection capability. It also supports the monitoring of multiple power sources of up to 40V rating. The device can be configured with five power supply output voltage levels, providing sufficient power to the system.

The MAX6823WUK+T also provides protection against noise and EMI, and is designed to withstand high shock and vibration. The supervisory circuit is available in a variety of package types, making it suitable for a range of applications from high power embedded systems, portable systems, and industrial applications.

Overall, the MAX6823WUK+T Supervisory Circuit from Maxim Integrated provides a versatile and highly integrated solution for monitoring supply voltage, resetting the system, and providing time-delayed power-on reset. It is suitable for use in a range of different applications, due to the wide range of configurable options and robust design.

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