资 源 简 介
The UC1854 provides acTIve power factor correcTIon for power systems that otherwise would draw non-sinusoidal current from sinusoidal power lines. This device implements all the control funcTIons necessary to build a power supply capable of opTImally using available power-line current while minimizing line-current distortion. To do this, the UC1854 contains a voltage amplifier, an analog multiplier/divider, a current amplifier, and a fixed-frequency PWM. In addition, the UC1854 contains a power MOSFET compatible gate driver, 7.5V reference, line anticipator, load-enable comparator, low-supply detector, and over-current comparator.
The UC1854 uses average current-mode control to accomplish fixed-frequency current control with stability and low distortion.
