APX809-29SAG-7 Integrated Circuits (ICs)

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Power management integrated circuits (PMICs) on modern electronic circuits have become increasingly important. This is due to the demand for improved power performance and efficiency, as well as the need to optimize the number of components used on any given board. PMICs handle the complex power management tasks easily while greatly reducing the number of components and board area.

Within this power management field, PMICs are classified by the specific tasks they are designed to handle. Supervisors are designed to monitor and protect electronic circuits from unauthorized access and power failure. This article explores the application field and working principle of the APX809-29SAG-7, a popular supervisor IC recently released on the market.

The APX809-29SAG-7, made by Abracon, specializes in monitoring power supply, controlling reset signals, and regenerating oscillator signals. It is mainly used for monitoring and controlling the voltage of a power supply unit (PSU). It is also capable of controlling reset signals for general-purpose microcontrollers so that the PSUs can be reset if necessary.

The APX809-29SAG-7\'s main function is to monitor a power supply unit\'s voltage and detect when it is outside of the desired range. It then acts upon this information and sends a reset signal to the microcontroller. This reset signal is designed to protect the microcontroller and the unit should anything unexpected happen to the power supply.

The working principles of APX809-29SAG-7 are based on a comparison between the supply voltage (Vdd) and pre-defined (Vth) threshold voltage. The voltage threshold is adjustable using an internal analogue-to-digital (ADC) unit, allowing for a precise output signal. When the supply voltage (Vdd) is lower than the threshold voltage (Vth) , APX809-29SAG-7 outputs a reset signal “low”. When the supply voltage (Vdd) reaches the desired levels, the output reset signal returns to “high” and stabilizes.

The APX809-29SAG-7 can assist in detecting when the power supply is failing and reset the system, as well as providing output so that a power supply can be oscillated and regulated to a desired voltage level. It can also detect an imminent brown-out (low voltage warning) condition and trigger a reset to prevent system damage if the supply voltage falls below the predefined threshold voltage.

A great advantage of the APX809-29SAG-7 is that it is equipped with an integrated oscillator, which allows for more precise control and more efficient power management. It comes with a wide range of operating temperature, making it suitable for industrial applications outside of consumer applications. In addition, its wide operating voltage range gives it greater flexibility when supporting PSUs.

In summary, the APX809-29SAG-7 is a supervisor IC that is equipped with a power supply monitoring system and reset signal control. Its integrated oscillator and adjustable threshold voltage make it ideal for both consumer and industrial applications. It provides robust and reliable protection for electronic systems by ensuring a stable power supply, preventing reset signal interruptions, and responding quickly to imminent power failures.

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