FT839NB1-RT Integrated Circuits (ICs)

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        The FT839NB1-RT is a full-bridge monolithic driver IC solution for offline flying capacitor switched (FCPS) converters. It is designed to drive N-channel/NMOS load switches in topologies such as push-pull, half-bridge, and full-bridge, and the available current capability allows the use of high-power N-channel MOSFETs. The FT839NB1-RT features a wide range of protection functions, further enhancing its robustness and system safety. It is ideal for low-cost power conversion with fast-transient response and low output-voltage ripple.

        The FT839NB1-RT application field is mainly for offline switchers for high power applications in the power management industry. It can be used for various offline switcher topologies such as flyback, forward, half-bridge, and full-bridge. It can power AC/DC offline low-cost power conversion systems such as switching adaptors, chargers, and off-line converters.

        The working principle of the FT839NB1-RT is based on the principle of a switched-mode power supply, which requires high switching frequency operation. The IC regulates output voltage by controlling the on/off time of the load switch. It uses a voltage-mode control technique to ensure fast, stable and accurate control of the load switch. A wide range of safety features ensures robustness, including over-temperature protection and an overload protection, to ensure that the load switch is always driven in the most efficient way, even in the most demanding power conversion applications. It also offers cycle-by-cycle current limiting and short-circuit protection, for added system safety.

        The FT839NB1-RT is therefore a highly efficient power controller solution for AC/DC offline low-cost power conversion systems such as switching adaptors, chargers, and off-line converters. It has been designed with maximum flexibility and the widest possible range of protection functions to ensure robust and reliable operation in the most demanding power conversion applications.

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