STR-A6061H

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The STR-A6061H, a switching power supply IC, is an important product belonging to the PMIC (power management integrated circuit) series with AC/DC converters and offline switchers as its main application field. This IC was developed by Sanken Electric Co., Ltd., a leading manufacturer of power semiconductor products. It offers exceptional performance at a reasonable cost and is ideal for switching power supply applications.

The STR-A6061H is designed to convert AC input voltages into DC output voltages. It offers a wide range of input voltages from 85 to 264 VAC and a wide range of output voltages from 12 to 24 VDC. The maximum output power is 6 W, making it suitable for many small to mid-range applications. The IC features a peak surge current threshold of up to 6 A, enabling it to withstand transient loads. The IC also offers a wide range of protection features, including foldback current limiting, overcurrent protection, overtemperature protection, and undervoltage protection.

In terms of structure, the STR-A6061H is composed of an IC and an external integrated transformer. The IC has a highly efficient switching power circuit design, with an IGBT-based front end and emitter-coupled logic (ECL) controllers. This IC is capable of switching frequencies up to 600 kHz, making it suitable for high-frequency power supply applications. The external integrated transformer is composed of windings, together with a special dielectric material which improves insulation between the primary and secondary windings.

In terms of working principle, the STR-A6061H is based on a synchronous rectification type topology. The IC draws pulses from the external integrated transformer, which is responsible for converting the AC input voltage into DC pulses. These pulses are fed into the IC’s switching circuit and selectively output as a DC output voltage. This IC also features a low standby power consumption (< 0.25 W) and a high efficiency of up to 87%.

As a result, the STR-A6061H is an excellent choice for switching power supplies and off-line switchers. It offers excellent efficiency with a wide range of output power, low standby power consumption, and the protection features needed in a switch mode power supply. Furthermore, its structure and working principle make it ideal for both small to mid-range applications and high-frequency power supply designs.

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