LGA75A-12-SJ1

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AC DC converters are power electronics devices used in a variety of applications. The LGA75A-12-SJ1 belongs to this category. This AC DC converter is designed to convert AC power from 240 V input to 12 V DC with a maximum power capability of 75 W.

It is designed to suppress voltage transients, filter noise, reduce power line interference, and offer high efficiency. The LGA75A-12-SJ1 is suitable for applications such as powering LED lights, CCTV cameras and surveillance systems, industrial motors, manufacturing equipment, and access control systems.

Working Principle

The LGA75A-12-SJ1 converter works on the principle of bridge rectification. When an alternating voltage is applied, it is divided into two separate components, one in each half of the bridge. Bypassing the negative component of the input voltage to ground via the diode bridge, the rectified voltage is obtained. This rectified voltage is then utilized by the regulator and filter to further reduce the rippling and change it into a steady DC voltage.

After rectification, the voltage is sent through the regulator which is placed at the output of the transformer. The regulator steps down the high voltage output from the transformer to the desired voltage level. The regulator is then connected to the output filter which reduces the rippling and spikes in the output voltage and also helps in smoothing the output.

The output from the regulator is then sent through an additional filter for further smoothing of the output voltage. This is accomplished by using a three-stage filter. The first stage of the filter is used to absorb higher frequency noise and transients and the second stage is used to absorb lower frequency noises and transients. The third stage of the filter is used to stabilize the output voltage.

The LGA75A-12-SJ1 converter then utilizes an active current limiter to maintain the output current level. This is done by monitoring the output voltage and limiting the output current when the voltage increases above the rated voltage. The current limiter also helps in protecting the device from overload.

Finally, the device utilizes a thermal cut-off protection system to prevent the device from overheating. This system constantly monitors the temperature of the device and automatically shuts down the device if the temperature exceeds the rated value.

The LGA75A-12-SJ1 converter is a reliable and efficient converter designed for applications that require a regulated output voltage of 12V. It is capable of delivering an output voltage in the range of 0.6 V to 12 V with a peak current of 4 A. It is a perfect choice for powering LED lights, CCTV cameras, industrial equipment, manufacturing equipment, and other devices.

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