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ACT8890Q4I236-T Application Field and Working Principle

The ACT8890Q4I236-T is a highly integrated system power supply with multiple stages and functions, developed by Active-Semi, Inc. It features a highly efficient quasi-resonant multi-channel synchronous buck converter, two DC/DC converters with power MOSFETs, two buck converters plus one linear regulator, with a wide input voltage range of 5.5V to 36V. It integrates multiple functions like voltage regulation, sensing, fault protection, current limit, over-temperature and short-circuit protection to support the latest generation of consumer, industrial, automotive and automotive infotainment SoCs.

The ACT8890Q4I236-T is designed to power system loads ranging from an embedded microcontroller or SoC in an industrial setting to an Infotainment system in an automotive platform. It provides the necessary power, protection, and regulation for the Loads. It is a highly efficient solution for powering high current applications up to 8 Amps with a small form factor and low system cost.

The ACT8890Q4I236-T works by converting one of its two DC/DC buck converters (1, 2, or both) at a synchronized switching frequency while the other is operating in linear mode. This leads to higher power conversion efficiency and improved system performance since the load current drawn from one converter is regulated and the other is switched. The ACT8890Q4I236-T also has an integrated phase compensation circuitry for ensuring proper ripple and current limit phase loading. This helps to maintain the desired phase balance in the system, which is important for precise voltage regulation.

To protect against over-voltage, over-current, and over-temperature conditions, the ACT8890Q4I236-T features a comprehensive set of protection features. It incorporates a variety of fault protection circuits, including over-temperature, current and voltage limit, brown-out and over-voltage detectors, and a latch and reset circuitry. The over-current and over-temperature protection features help to limit the current in the system and protect the SoC in the event of an over-temperature condition, respectively. The ACT8890Q4I236-T also has an integrated power-good indicator, which is asserted when the voltage is within the acceptable range.

ACT8890Q4I236-T has a programmable output current limit and a wide range of programming options. It supports both I2C and SMBus for digital control, allowing for enhanced system flexibility. It also has an integrated auto-skip function to enable low solution cost.

In conclusion, ACT8890Q4I236-T is a highly-integrated system power solution designed for powering a variety of SoCs and embedded microcontrollers. It features a quasi-resonant multi-channel synchronous buck converter, two DC/DC buck converters with power MOSFETs, and two buck converters plus one linear regulator, and an integrated auto-skip function to enable low solution cost. With a wide input voltage range, an integrated set of fault-protection features, and flexible programming options via I2C and SMBus, ACT8890Q4I236-T provides an efficient and reliable way of powering different system loads.

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