UC3853
FEATURES
- plete 8-pin Power Factor
Solution
- Reduced External ponents
- RMS Line Voltage pensation
- Precision Multiplier/Squarer/Divider
- Internal 75k Hz Synchronizable Oscillator
- Average Current Mode PWM Control
- Overvoltage Protection parator
- High Current, Clamped Gate Driver
DESCRIPTION
The UC3853 provides simple, yet high performance active power factor correction. Using the same control technique as the UC1854, this 8-pin device exploits a simplified architecture and an internal oscillator to minimize external ponent count. The UC3853 incorporates a precision multiplier/squarer/divider circuit, voltage and current loop error amplifiers, and a precision voltage reference to implement average current mode control with RMS line voltage pensation. This control technique maintains constant loop gain with changes in input voltage, which minimizes input line current distortion over the worldwide input voltage range.
The internal 75k Hz oscillator includes an external clock...
