EVAL-ADUM4070EBZ

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The EVAL-ADUM4070EBZ is an evaluation board designed and manufactured by Analog Device Inc. It is one of the evaluation boards in the DC/DC & AC/DC (Off-Line) SMPS category, and is mainly used for powering motors, appliances and other critical operations where high efficiency, high power density with overload or short circuit performance is required. The EVAL-ADUM4070EBZ evaluation board makes use of an isolated dual-channel power supply that provides two independent outputs with a shared ground pin for high efficiency and reliable operation.

The evaluation board\'s main components consist of a DC/DC converter with isolated dual channels, two DC/DC controllers, two common mode chokes, two transformers, and one isolated rectifier bridge. The DC/DC converter utilizes two pair of MOSFETs in the primary stage, followed by two optocouplers with feedback circuits for each of the two channels. These optocouplers are driven by two DC/DC controllers, from which one is dedicated to each output channel.

The working principle of the EVAL-ADUM4070EBZ evaluation board is quite simple. In the primary side, the bridge rectifier rectifies the input voltage and sends it to the MOSFETs. The MOSFETs then switch the current to the two transformers, with one transformer being dedicated to each of the two output channels. This current is then switched to the secondary side where it is rectified by the rectifier diodes to produce the desired output, with the second isolated channel receiving the same input voltage as the first channel to provide a "floating voltage" between the two channels.

The two output channels use two separate voltage regulators that are connected to the respective transformers. This helps isolate the two channels so that any voltage disturbances in one channel does not affect the other one. This also allows for better regulation and control of the output voltage in the channels. The two DC/DC controllers help regulate the input voltage to the two channels and each of them can be configured by an external user for precise voltage regulation.

The evaluation board also features two common mode chokes that are used for suppressing interference noises and improving the performance of the system. The common mode chokes are placed between each transformer and the corresponding DC/DC controller. They serve to maintain a balanced common mode voltage and prevent any external interference from affecting the power supply and its performance.

Overall, the main purpose of the EVAL-ADUM4070EBZ evaluation board is to provide a high powered, highly efficient dual channel power supply with overload and short circuit protection. The board is easy to use and configure, and provides a great platform for engineers to evaluate their designs and develop efficient applications.

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