ACT412US-T

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AC/DC converters are devices that are used to convert alternating current (AC) power to direct current (DC) power. The ACT412US-T is a highly integrated AC/DC converter capable of providing up to 12W of continuous output power from a power supply input. This converter is suitable for applications with output power requirements from 2 W to 12 W and has a wide input voltage range, making it an ideal solution for powering applications such as industrial and telecom equipment, consumer electronics, and so on.

Application field

The ACT412US-T is suitable for applications requiring up to 12W of output power. It can be used in many different types of equipment. These include:

• Photovoltaic systems such as solar panels
• Industrial machinery
• Medical devices
• Computer systems
• Telecommunications equipment
• Consumer electronics
• Automatic control systems

The ACT412US-T is uniquely designed to provide high efficiency and low power loss while meeting the requirements of most industrial applications. It is well suited for applications with wide input voltage range and can operate from either single or dual input supplies.

Working principle

The ACT412US-T is a flyback topology converter that uses a synchronous rectifier to provide the highest power conversion efficiency. It consists of a power switch, an inductor, a rectifier, a capacitor and a control circuitry. In the first stage, power is supplied to the primary winding of the transformer when the power switch is on. This results in a current flowing in the primary winding, hence creating a magnetic flux in the transformer. The secondary winding voltage is then produced which is rectified by a synchronous rectifier resulting in a steady DC output.

The ACT412US-T also includes safety features to protect against over-voltage, over-current and over-temperature conditions. It features an integrated low-side driving circuit for the synchronous rectifier, so no additional components are needed for the secondary side of the converter. It also incorporates a soft start to prevent over-current at startup and a UVLO (Under Voltage Lock Out) protection to protect the device from unexpected overloads.

The ACT412US-T has a high power density of 0.8W/cm³, which makes it suitable for space-constrained applications, and a low quiescent current of 0.3mA, allowing it to achieve more than 92% conversion efficiency at light loads. It also has a wide operating temperature range, making it suitable for a range of industrial applications.

In conclusion, the ACT412US-T is a highly integrated AC/DC converter capable of providing up to 12W of continuous output power from a power supply input. It is suitable for a wide variety of industrial applications and features safety features, high efficiency, and low power loss. Its high power density, low quiescent current, and wide operating temperature range make it an ideal solution for many industrial applications.

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