TNY287DG

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PMIC - AC DC Converters, Offline Switchers

The TNY287DG is an AC/DC converter used in offline applications which operates in an adapter and a flyback topology. It integrates a 700V power MOSFET, a current mode controller, a high-voltage startup cell as well as all other necessary protection functions like over-voltage, over-current and short circuit protection. It is mainly used in applications where it is desired to have an offline meaning there is no need for the unit to be connected to a power source when the power is ON.

The TNY287DG includes a 700V power MOSFET, allowing AC/DC conversion in most offline topologies. It also has a high-voltage startup cell along with all other necessary protection functions such as over-voltage, over-current and short circuit protection. This enables it to be applied in applications in which an offline solution is sought, meaning it is not necessary to be connected to any power source when the power is ON.

The working principle of the TNY287DG is as follows. The power stage consists of a 700V power MOSFET switch, as mentioned before. The controller is a current mode controller which is used to control the power MOSFET through a current regulated feedback loop. The current feedback loop ensures that the current is maintained at a certain level even when the input voltage and output load is changing. Furthermore, the controller also has a startup cell which is used to help the control loop to start up and maintain the loop even when the input voltage is absent.

The TNY287DG is very efficient and provides a wide range of applications. It can be used as a flyback converter in any type of offline application, such as LED drivers and battery chargers. It is especially suitable for low power applications as it is able to provide low power losses while ensuring low stand-by power consumption. Furthermore, it can be used in low voltage applications as it is able to operate down to 3.2V input and start up at a low voltage level.

Overall, the TNY287DG is a robust and reliable AC/DC converter designed for offline applications. It can operate in any topology and provide all necessary protections. The current mode control and the startup cell feature make the TNY287DG easy to use and suitable for low power and low voltage applications.

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