LT8312MPMS#PBF

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Power factor correction (PFC) is a technique of rectifying AC power to ensure that a consistent and reliable electrical system is maintained. PFC is mainly used in AC-DC power supplies, DC-DC converters, and other AC-AC conversion equipment. The LT8312MPMS#PBF is a PFC power stage controller and current mode controller that is designed to provide an efficient solution for power factor correction applications.

The LT8312MPMS#PBF is a single-chip PFC controller with adjustable spread spectrum and programmable pre-bias start-up. The device integrates a synchronous current mode PFC controller, a pre-bias PFC controller, a regulated 5V LDO, one sample-and-hold amp, and a programmable oscillator that can provide adjustable switching frequency up to 600kHz to reduce total harmonic distortion (THD).

In LT8312MPMS#PBF-based power factor correction systems, the PFC controller monitors the AC line voltage and current, and sends the corresponding feedback signals to the power stage, thereby adjusting the primary-side voltage and current to the desired quantity. The system can allow the power section to operate in constant current or constant voltage mode, with the operation of the power stage driven by the PFC controller’s output signal.

The LT8312MPMS#PBF provides powerful and robust protection features for the power stage, such as over-voltage protection (OVP), under-voltage protection (UVP), over-current protection (OCP), and thermal shutdown (TSD). The device also integrates a pre-bias startup circuit that can support a wide pre-bias range while ensuring low output voltage ripple. All these features help to enhance the reliability and efficiency of the overall power factor correction system.

In summary, the LT8312MPMS#PBF is an effective and efficient solution for power factor correction applications. The device provides adjustable spread spectrum, programmable pre-bias start-up, and advanced protection features. These features make the LT8312MPMS#PBF ideal for AC-DC power supplies, DC-DC converters, and other AC-AC conversion equipment.

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