INN3167C-H105-TL

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Offline switchers have become extremely popular for their applications in various industries, ranging from consumer electronics to aircrafts and from medical to industrial. The INN3167C-H105-TL is an AC/DC converter manufactured by STMicroelectronics and is an example of such a switching component. The component is an integrated device that provides a complete current-mode model for power conversion.

The component is designed for low-power applications and is ideal for a wide range of switched-mode power supplies. It offers several attractive features such as a maximum switching frequency of 4MHz and a wide VOUT range of 4.5 V to 50V.

The component has a package of 14-pin SSOP and is rated for peak current up to 1.2A. It offers thermal protection and overload protection and is available in a variety of output options, including fixed frequency and adjustable frequency options. The component is also compliant with the RoHS Directive and is capable of programming and controlling both input and output overvoltage protection.

At the heart of the component lies its current-mode operating principle. This principle is implemented using a half-bridge (HB), which is composed of two MOSFET switches in series connected to the AC mains. The voltage is sensed at the output of the primary switch and is monitored using a voltage comparator. When the sensed voltage is greater than a predetermined threshold, the HB switches are closed and the current is allowed to flow in the transformer secondary.

The current that is delivered to the load is then regulated using the same current-mode control principle. In this mode, the voltage that is present in the HB is monitored continuously and used to detect the load current drawn from the system. The HB is then modulated so as to maintain the desired current in the transformer secondary. This current is then delivered to the load. The modulated current is limited by a short-circuiting device and the HB is then kept open or closed as needed to deliver the required current to the load.

The INN3167C-H105-TL thus enables efficient power conversion up to the rated peak power output of 1.2A. In addition, the component offers overvoltage and overcurrent protection, thermal protection, and attractive package options for various applications. The component is thus ideal for a variety of applications in industrial and consumer electronics, as well as medical, aerospace and military applications, requiring efficient, reliable and robust ac/dc conversion.

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