NCP803SN293D2T1G

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The NCP803SN293D2T1G is an Active Load Switch supervisor circuit from ON Semiconductor. It is a cost effective tool targeted at space-constrained applications that need reliable power supply management. As part of the Power Management IC (PMIC) - Supervisors family, it is workable for battery powered systems, power isolators, VRMs, and other applications. This article will provide an overview of the NCP803SN293D2T1G active load switch, its application fields, and an examination into its working principles and features.

The NCP803SN293D2T1G active load switch is made up of two parts: a load switch controller and a load switch. The load switch controller takes control of the load switch and keeps it powered no matter the input-output conditions. The load switch features low RDS(ON), low leakage current, and high on-off ratios. Its SOIC package makes it adjustable for typically small, space-constrained applications. It also has a wide operating temperature range (-40°C to +125°C) guaranteeing reliable operation in extreme ambient conditions.

NCP803SN293D2T1G Application Field

The NCP803SN293D2T1G is a great fit for battery powered systems of any kind, from Wearables to Automotive Electronics. Wearables is a fast-growing application for batteries, such as in smartwatch design. In Automotive Electronics, the NCP803SN293D2T1G can help protect from short circuits, reverse voltage, and thermal stress under severe conditions. Also, it can be used for power isolation to ensure the reliable performance of a system. Likewise, the NCP803SN293D2T1G can be applied in Voltage Regulator Modules (VRMs). Here, the active load switch supervisor gives robustness to the system by performing frequency and voltage regulation.

NCP803SN293D2T1G Working Principle

To understand how the NCP803SN293D2T1G works, you must first understand load switch controllers in general. The controller is a voltage and current controlled regulator generally consisting of two power semiconductors, a capacitance and a controlled resistance. The purpose of the controller is to control the output voltage of the load switch. The controller knows the controlling voltage and current, and based on that, it adjusts the on/off times of each cycle. It does this by measuring the input voltage and then setting the output voltage to maintain a constant output. Each of the power semiconductors (MOSFET) on the NCP803SN293D2T1G controller controls one side of the load switch, switching it on and off as required to maintain the desired output voltage.

The load switch of the NCP803SN293D2T1G has a low resistance due to the low RDS(ON) which means it requires less energy to operate. It also has a low leakage current, meaning that it can be powered off without drawing too much current. Additionally, it has a high on/off ratio, meaning that it takes a small amount of electrical power to turn it on, but due to the high ratio, a much greater power can be fed into the system while still remaining in control. This is important as it allows the system to be protected against power surge.

Conclusion

The NCP803SN293D2T1G is an ideal active load switch supervisor for a variety of applications, from automotive electronics to industrial power supply management. Of special note is its ability to maintain reliable operation with a wide range of operating temperature and its adjustable size for small, space-constrained applications. Of equal importance is its working principle and feature set: its low RDS(ON), low leakage current, and high on-off ratio make it a great choice for ensuring reliable performance and power isolation. With its combination of great features and versatile applications, the NCP803SN293D2T1G is sure to be a popular choice for any system that requires reliable power management.

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