UC3852
Overview
The UC1852 provides a low-cost solution to active power-factor correction (PFC) for systems that would otherwise draw high peak current pulses from AC power lines. This circuit implements zero-current switched boost conversion, producing sinusoidal input currents with a minimum of external components, while keeping peak current substantially below that of fully-discontinuous converters.
- Low-Cost Power Factor Correction
- Power Factor Greater Than 0.99
- Few External Parts Required
- Controlled On-Time Boost PWM
- Zero-Current Switching
- Limited Peak Current
- Min and Max Frequency Limits
- Starting Current Less Than 1mA
- High-Current FET Drive Output
- Under-Voltage Lockout
