SF5922 Overview
SF5922 is a high performance, highly integrated DCM (Discontinuous Conduction Mode) Primary Side Regulation (PSR) power switch for offline small power converter applications. SF5922 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.
SF5922 Key Features
- Built-in 600V Power MOSFET
- Low Standby Power Under 30mW, Easily to Pass Energy Star EPS2.0
- Primary Side Regulation (PSR) without TL431 and Opto-Coupler
- ± 5% Constant Current (CC) and Constant Voltage (CV) Regulation at Universal AC Input
- Proprietary Cable Voltage Drop pensation in CV Mode
- pensate for Line Voltage Variation
- pensate for Transformer Inductance Tolerances
- Built-in Control Loop pensation in CV Mode
- All Pins Floating Protection
- PFM Control Eases EMI Design
SF5922 Applications
- Battery chargers for cellular phones, cordless phones, PDA, digital cameras, etc