SF5928 Overview
SF5928 is a high performance, highly integrated DCM (Discontinuous Conduction Mode) Primary Side Regulation (PSR) power switch for offline small power converter applications. SF5928 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.
SF5928 Key Features
- Built-in 600V Power MOSFET
- Primary Side Regulation (PSR) without TL431
- ± 5% Constant Current (CC) and Constant
- Proprietary
- pensate for Line Voltage Variation
- pensate for Transformer Inductance
- Built-in Control Loop pensation in CV
- All Pins Floating Protection
- PFM Control Eases EMI Design
- Cycle-by-Cycle Current Limiting
SF5928 Applications
- Battery chargers for cellular phones, cordless