SiFirst SF5920
SF5920 is a high performance, highly integrated DCM (Discontinuous Conduction Mode) Primary Side Regulation (PSR) controller for offline small power converter applications. The IC dramatically lowers system cost by eliminating the opto-coupler and secondary control circuits. It also can provide very tight output voltage regulation (CV), in addition to output current control (CC) ideal for charging applications.| Part No. | SF5920 |
|---|---|
| Datasheet | SF5920 Download |
| Manufacturer | SiFirst |
| Description | CV/CC Controller |
| Buy | Stock & Price |
FEATURES
● Low Standby Power Under 30mW, Easily to Pass Energy Star EPS2.0● Proprietary NC-Cap/PSRTM (Primary Side Regulation) Control without External Compensation/Filtering Capacitor Needed
● ± 5% Constant Current (CC) and Constant Voltage (CV) Regulation at Universal AC Input
● Proprietary Cable Voltage Drop Compensation in CV Mode
● Compensate for Line Voltage Variation
● Compensate for Transformer Inductance Tolerances
● Pins Floating Protection
● PFM Control Eases EMI Design
● Cycle-by-Cycle Current Limiting
● Built-in Leading Edge Blanking (LEB)
● Built-in Soft Start
● Output Over Voltage Protection
● VDD OVP & Clamp
● VDD Under Voltage Lockout (UVLO)
APPLICATIONS
● Battery chargers for cellular phones, cordless phones, PDA, digital cameras, etc● Replaces linear transformer and RCC SMPS
● Small power adapter
● AC/DC LED lighting
GENERAL DESCRIPTION
SF5920 uses Pulse Frequency Modulation (PFM) control to improve efficiency and eases system EMI design. SF5920 has built-in proprietary NC-Cap/PSRTM control for CV control, which eliminates external compensation or filtering capacitor.
