UCC3808ADTR-1

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The UCC3808ADTR-1 is a single-stage, AC-DC offline flyback converter typically used to provide overvoltage and overcurrent protection to various applications. It is a member of TI’s family of AC-DC offline switchers and provides overvoltage, overcurrent, and short-circuit protection. The UCC3808ADTR-1 is designed to enable high performance, high efficiency, and simplified design for a range of pulse width modulated (PWM) applications in a variety of digital power solutions, including plug-in adapters, motor control, digital and analog audio, telecommunications, and digital display.

The working principle of the UCC3808ADTR-1 is based on an offline flyback topology. In the flyback topology, an unregulated AC-DC power supply is converted into a regulated voltage output by using a switching MOSFET. The MOSFET is operated in pulse width modulation (PWM) mode, periodically switching the AC input current on and off. This creates pulsing output voltages that are then rectified and being integrated into a regulated output voltage. The switching controller regulates the output voltage via a MOSFET gate driver, controlling the PWM duty cycle as well as the predefined output voltage and current levels.

The UCC3808ADTR-1 also features a comprehensive protection circuit. The integrated overvoltage protection (OVP) prevents the output voltage from going above the defined limit, while an undervoltage protection (UVP) prevents the output voltage from going below the minimum operating voltage. The overload protection (OLP) monitors the output current continuously, which will trigger when the load current exceeds the predefined limit or in the event of a short circuit. There is also a thermal protection (TSD) that monitors the component temperature and will shut down the output if the temperature exceeds the predefined limit.

The UCC3808ADTR-1 is a single-stage, AC-DC offline flyback converter intended to provide overvoltage, overcurrent and short-circuit protection to a range of applications. It offers high performance, high efficiency, and simplified design for PWM applications in digital power solutions, such as plug-in adapters, motor control, digital and analog audio, telecommunications, and digital display.

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