UC3854DW SMD SOIC-16 Integrated

UC3854N is a Hi-Fi that provides active power factor correction for power systems that would otherwise draw non-sinusoidal current from sinusoidal power lines. It is a Power Factor Preregulator. This device implements all the necessary control functions to create a power supply that can make optimal use of the available power line current while minimizing line current distortion. To do this, it includes a voltage amplifier, an analog multiplier/divider, a current amplifier and a fixed frequency PWM. Additionally, the UC3854 includes a power MOSFET compatible gate driver, 7.5V reference, line estimator, load enable comparator, undersupply detector, and overcurrent comparator. UC3854 uses average current mode control to realize constant frequency current control with stability and low distortion. Unlike peak current mode, average current control accurately maintains sinusoidal line current without slope compensation and with minimal response to noise transients.