SF5920 Overview
SF5920 is a high performance, highly integrated DCM (Discontinuous Conduction Mode) Primary Side Regulation (PSR) controller for offline small power converter applications. SF5920 uses Pulse Frequency Modulation (PFM) control to improve efficiency and eases system EMI design. The IC dramatically lowers system cost by eliminating the opto-coupler and secondary control circuits.
SF5920 Key Features
- Proprietary NC-Cap/PSRTM (Primary Side
- ± 5% Constant Current (CC) and Constant
- Proprietary
- pensate for Line Voltage Variation
- pensate for Transformer Inductance
- Pins Floating Protection
- PFM Control Eases EMI Design
- Cycle-by-Cycle Current Limiting
- Built-in Leading Edge Blanking (LEB)
- Built-in Soft Start
SF5920 Applications
- Battery chargers for cellular phones, cordless