TEA1723BT/N1,118

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PMIC - AC DC Converters, Offline Switchers

TEA1723BT/N1,118 is a high performance AC/DC converter that uses offline switcher technology. It features an integrated 1,000V MOSFET switch able to operate from 110V AC up to 500V AC as well as a very small size and low external component count. This makes it ideal for a variety of applications such as LED lighting, AC adapters, and off line power supplies.

Operating Principle

The TEA1723BT/N1,118 has a number of integrated features and architecture that allow it to offer improved performance compared to traditional offline switchers. The following illustrates how the device works. Firstly, when AC line voltage is applied and the enable signal is activated, an internal circuit generates a driver signal which is used to trigger an SCR (or ‘Switch’). The SCR is then latched on, allowing the MOSFET switch to conduct. As the AC line voltage increases, the MOSFET switch will become more conductive and the SCR will become less conductive, eventually resulting in high currents being passed through the MOSFET switch and some energy being stored in the output capacitor.

The energy stored in the output capacitor is then released through the rectifier and DC circuit, eventually generating the desired DC output voltage. At the same time, the MOSFET switch is switched off and the process is repeated. This process leads to an energy efficient conversion of AC line voltage to DC output voltage.

Application Fields

Due to its capabilities, the TEA1723BT/N1,118 can be used in several demanding applications. The most common one is LED lighting. It can provide highly efficient current and voltage regulation, as well as power factor corrections, which make it a good choice when building LED lighting applications.

It can also be used in AC adapters and Off Line Power Supplies. The latter makes use of the under-voltage and over-voltage protection features, which ensures none of the components in the system are overloaded. In the same way, with the high-voltage sensing feature of the device, AC adapters can be protected from various AC line uncertainties.

Conclusion

In conclusion, the TEA1723BT/N1,118 is a highly efficient AC/DC converter that is especially useful for LED lighting, AC adapters, and off-line power supplies. It features an integrated 1,000V MOSFET switch, able to operate from 110V AC up to 500V AC, and a very small size, making it an ideal choice for demanding applications. The device works by generating an SCR signal, used to trigger an SCR, which is then latched on, allowing the MOSFET switch to conduct. Finally, the energy stored in the output capacitor is released through the rectifier and DC circuit to generate the desired DC output voltage.

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