ACT8937

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ACT8937 Application Field and Working Principle

ACT8937 is a monolithic PMIC -- Power Management -- Specialized integrated circuit (IC) family from Analog Devices. It is a highly integrated, high-performance, cost-effective and feature-rich solution for many different kinds of applications, including mobile phone, tablet, and other mobile devices, laptop, LCD monitor, TV set and audio/video system.

The ACT8937 provides a combination of high-performance DC-DC power conversion, LDO regulators, system power management, and integrated fault protection. It integrates step-down DC-DC controllers, step-up DC-DC controllers, LCD bias voltage generators, GPIO, and one low dropout (LDO) regulators. By fully leveraging Analog Devices’ expertise in power management, the ACT8937 enables high power supply efficiency and powerful system-level power management solutions.

Working Principle and Key Features

The ACT8937 is a highly flexible and integrated device that can support multiple battery chemistries, including Li-Ion, Li-Polymer and NiCd. It also supports a wide variety of power management functions, such as battery charging, load switching, system monitoring and protection, and code-free programming. In addition, the ACT8937 includes several unique features, such as overvoltage protection, undervoltage lockout, surge protection and cellular compatibility.

The ACT8937 also includes an advanced power management scheme called “PowerPath” technology, which allows higher current from a given application without the need for an extra battery or power source. When a device’s battery reaches its designed voltage, PowerPath allows the DC-DC converter to be driven by AC power and the battery’s power is then used to buffer the ac power. The battery can then take over the control of the system allowing the device to continue to operate while the battery is being charged. This helps to achieve excellent system performance while maintaining high energy efficiency.

The ACT8937 provides a powerful and flexible solution to customers looking for an integrated, cost-effective PMIC solution that is ideal for mobile, portable and other space-constrained applications. It provides power sequencing, voltage protection and voltage scaling. With the PowerPath feature, the ACT8937 can provide the best solution for applications that require high-efficiency power-management along with low power consumption.

Conclusion

The ACT8937 is a high-performance and economical PMIC – Power Management – Specialized integrated circuit from Analog Devices. It provides fast, high-efficiency power conversion, integrated fault protection, load switching and system monitoring. By combining high-performance DC-DC power conversion with PowerPath technology, the ACT8937 allows high current draw in applications where a battery alone is insufficient. It provides the most cost-effective and flexible solution for portable and high-efficiency applications.

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