AS1902A22

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The AS1902A22 is a system supervisor device that provides an integrated solution for monitoring supervisory functions. It offers the most comprehensive set of power supply and system management functions available in a single shield-pin. As the name implies the AS1902A22 offers system supervisors a multitude of functions to help maintain safe power conditions.

The AS1902A22 is a micro-sized digital system monitor and protection device that is particularly well-suited for use in microprocessor and digital signal processor (DSP)-based systems. It offers a wide range of output voltage monitoring and protection features, as well as integrated reset and watchdog timer functions.

The AS1902A22 integrates the latest microcontroller-based power management technologies in order to provide a safe and reliable platform for a variety of applications. It features an 8-bit base voltage monitor with a programmable threshold, current limiting output drivers with adjustable trip points and adjustable watchdog timer intervals.

In addition to the voltage monitor, the AS1902A22 provides a full range of system monitor, protection and reset/watchdog timer functions. It has a programmable power-on reset (POR) circuit and an ESD (electrostatic discharge) protection circuit that provide protection against power surges and transients. It also features an adjustable power-on delay circuit which allows for power sequencing between multiple AS1902A22 devices.

The AS1902A22 application field is mainly in embedded systems, LCD displays, sets-top boxes, etc. It\'s main purpose is to monitor a system’s power resources and provide safety functions such as power sequencing. The system monitor allows for monitoring the current, voltage and temperature of various sources, such as supply rails, digital processor cores and memory devices. In addition, it can detect and help protect against over-voltage, over-current, thermal and ESD conditions.

The AS1902A22 works by continuously monitoring the power supply voltage and adjusting the output voltage accordingly. The output voltage is compared to an internal voltage reference which is adjustable via external resistors. If the voltage drops below the reference level, the output voltage is adjusted accordingly. It also features an adjustable voltage limit that sets an upper limit for the output voltage.

The AS1902A22 also features an integrated under-voltage lockout (UVLO) circuit that prevents the system from operating with an input voltage below a predetermined level. The UVLO circuit monitors changes in the input voltage and interrupts the power supply when the input voltage drops below the predetermined level.

The AS1902A22 also prevents excessive output voltage during power sequencing. This prevents voltage spikes that can damage delicate components. An adjustable delay timer is also provided, which allows the system to wait a specified amount of time before the output voltage is released.

The AS1902A22 also provides an integrated system reset and watchdog timer circuit. The reset circuit can be used to reset one or more devices, while the watchdog timer generates a reset signal to a single device if its internal timer is not periodically reset by an external controller.

The AS1902A22 is a great all-in-one solution for power monitoring and protection requirements. It provides a full range of system monitor, protection and reset/watchdog timer functions, and is well-suited for use in microprocessor and digital signal processing-based systems.

The specific data is subject to PDF, and the above content is for reference