ACT4527YH-T

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The ACT4527YH-T is a smart electronic device belonging to the group of DC DC Switching Regulators. It is manufactured and distributed by Analog Components Company, located in Valencia, Spain. It is typically used to provide an accurate, constant output voltage from a varying input power supply. It is an integrated switching regulator that combines a low-voltage power conversion controller, switches and voltage and current feedback circuitry.

The ACT4527YH-T has a wide application field and can be used in variety of areas, such as home appliances, entertainment systems, telecommunication, HVAC, lighting equipment, transportation systems, automotive, industrial and medical equipment.

The device is optimized for high power efficiency, minimized EMI, low start-up current and simple input current loop, thus providing an efficent and reliable power management solution. The ACT4527YH-T can be used to drive small or medium size inductors, having an output voltage ranging from 0.8 to 10V and power output between 10 and 100Watts.

The working principle of the ACT4527YH-T is based on inductive power conversion, employing a high-frequency switching mode with current-mode (CM) control. The input power is used to drive switches in the power conversion stage, which in turn cause a cyclic variation in the output voltage. These cyclic variations are combined with a feedback controller, which drives the switches such that the output voltage is accurately maintained, independent of input voltage and output load.

The current-mode control provides a very fast feedback loop and is used to react on sudden changes in the input supply and load, thereby compensating for any variations. It also reacts to a wide range of input power levels and enables the load to be followed with a very fast response. The output voltage is precision regulated within +/-1% for a variation in input supply voltage between +/-15% over the full load range.

The core feature of the ACT4527YH-T is its soft-start feature. On start-up and also on a sudden change of input voltage level, the soft-start feature limits the current flowing through the inductor or transformer, making the output voltage start up gradually. This prevents the output voltage from spiking and exceeding the rated voltage level.

In order to extend the lifetime of the device, it is also equipped with the overvoltage protection. This feature prevents the output voltage from exceeding a preset value, even under peak load conditions. In addition, the ACT4527YH-T comes with open-loop protection, which shuts down the output power if the load is disconnected or a short circuit is detected.

The ACT4527YH-T is a highly efficient, reliable and cost effective switching regulator solution which finds wide application in many industries. It offers many unique features such as soft-start and overvoltage protection, which make it a desirable solution for all types of switched-mode power supply designs.

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