DS1831DS+

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PMIC Supervisors are widely used in the electronics industry to provide precise thermal protection, over-voltage and over-current protection to a variety of circuits. The DS1831DS+ is a versatile and tiny supervisor from Maxim Integrated, which provides over-voltage and over-current protection (OVP/OCP) for various applications, making it a popular choice for many designers. This article will discuss the applications and working principle of the DS1831DS+.

Applications of the DS1831DS+

The DS1831DS+ can be used in a variety of different applications. One of its primary applications is in cellphone charger adapters, to provide over-voltage and over-current protection. It is also used in battery chargers, power supplies, and other high-current applications requiring precise and accurate protection. The supervisor is also ideal for automotive applications such as providing OVP/OCP protection for 12V systems.

The supervisor also offers excellent accuracy and high levels of precision. It can detect error levels as small as 32mV, approximately one part in 10^(-3), which makes it suitable for use in battery chargers, solar charges and other precision power applications. Furthermore, its tiny SOT23-6 package makes it suitable for high density PCB designs.

Features of the DS1831DS+

The DS1831DS+ provides many features which make it a useful and valuable supervisor for many applications. It comes with both over-voltage protection (OVP) and over-current protection (OCP). With OVP, it can detect voltages as low as 3.5V to as high 6.3V, while with OCP, it can detect currents ranging from 0A to 4A with a minimum switching threshold of 32mV. It also has an adjustable time delay ranging from 8ms to 5468ms and an adjustable level of accuracy.

The supervisor also has an adjustable headroom voltage, meaning it can be set to trip at a higher or lower voltage than the normal OVP threshold. It also has an adjustable trip pointer, which allows the user to set a different voltage trip point than the normal OVP threshold. These features make the DS1831DS+ suitable for use in both cost-efficient and ultra-precise voltage/current protection circuits.

Working Principle of the DS1831DS+

The DS1831DS+ is an accurately engineered supervisor which uses advanced technology to detect and protect against dangerous over-voltage and over-current conditions. It uses an integrated voltage comparator to compare the input voltage against the over-voltage and over-current thresholds, which are pre-programmed or set by the user. If the input voltage reaches beyond the set threshold, the supervisor trips and shuts off the power supply. In addition, the supervisor also has an adjustable time delay, which helps to ensure that the supervisor is not falsely tripping and shutting down the power supply due to a brief surge in voltage.

The supervisor can also detect and provide protection against over-current conditions. It works by monitoring the current flowing through its detection resistor. When a current value higher than the pre-set threshold is detected, the supervisor trips and shuts down the power supply. Furthermore, the supervisor has an adjustable level of accuracy which allows it to detect more subtle changes in current levels.

Summary

The DS1831DS+ is a useful and versatile supervisor from Maxim Integrated which provides precise and accurate over-voltage and over-current protection for various applications. It is widely used in cellphone charger adapters, battery chargers, power supplies, and other high-current applications. It comes with both OVP and OCP, adjustable time delay, adjustable headroom voltage, and adjustable trip pointer, as well as an adjustable level of accuracy. It works by comparing the input voltage with the pre-set OVP/OCP thresholds and cutting off the power supply should it reach beyond those thresholds. The DS1831DS+ supervisor thus provides a valuable tool for protecting circuits against dangerous over-voltage and over-current conditions.

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