SiFirst SF5928
SF5928 is a high performance, highly integrated DCM (Discontinuous Conduction Mode) Primary Side Regulation (PSR) power switch 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. | SF5928 |
|---|---|
| Datasheet | SF5928 Download |
| Manufacturer | SiFirst |
| Description | High Precision Primary Side Regulation (PSR) CV/CC Power Switch |
| Buy | Stock & Price |
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 Compensation in CV Mode
● Compensate for Line Voltage Variation
● Compensate for Transformer Inductance Tolerances
● Built-in Control Loop Compensation in CV Mode
● All 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 TYPICAL APPLICATION
GENERAL DESCRIPTION
SF5928 uses Pulse Frequency Modulation (PFM) control to improve efficiency and eases system EMI design.
