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SF5920S Scheda tecnica(PDF) 1 Page - SIFIRST TECHNOLOGIES NANHAI LIMITED |
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SF5920S Scheda tecnica(HTML) 1 Page - SIFIRST TECHNOLOGIES NANHAI LIMITED |
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1 / 2 page  ©SiFirst Technology - 1 - Confidential SiFirst_DS_5920S_V1.3 SF5920S FEATURES ◆ Multi-Mode Control ◆ Max. Frequency Clamping to Limit Power MOSFET Vds Spike @ Output Short Circuit ◆ Proprietary NC-Cap/PSR TM (Primary Side Regulation) Control without External Compensation/Filtering Capacitor Needed ◆ Low Standby Power Under 70mW, Easily to Pass Energy Star EPS2.0 ◆ ± 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 and Transformer Inductance Tolerances ◆ Audio Noise Free Operation ◆ Pin Floating Protection ◆ 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 ◆ AC/DC LED lighting GENERAL DESCRIPTION SF5920S is a high performance, highly integrated DCM (Discontinuous Conduction Mode) Primary Side Regulation (PSR) controller for offline small power converter applications. SF5920S uses Multi Mode Control to improve efficiency and reliability and to decrease audio noise energy @ light loadings. Around the full load, the system operates in PWM+PFM mode, which improve the system reliability. Under light load conditions, the IC operates in PFM mode to achieve excellent regulation and high efficiency, and to achieve less than 70mW standby power. SF5920S also integrates the function of “Max. Frequency Clamping @ Output Short Circuit” to limits power MOSFET Vds spike when output short circuits occurs. SF5920S has built-in proprietary NC-Cap/PSR TM control for CV control, which eliminates external compensation or filtering capacitor. It also has built-in cable drop compensation function, which can provide excellent CV performance. The IC also has built-in soft start function to soften the stress on the MOSFET during power on period. SF5920S integrates functions and protections of Under Voltage Lockout (UVLO), VDD Over Voltage Protection (VDD OVP), Output Over Voltage Protection (Output OVP), Soft Start, Cycle-by-cycle Current Limiting (OCP), Pin Floating Protection, Gate Clamping, VDD Clamping. SF5920S is available in SOT23-5 package. TYPICAL APPLICATION NC-Cap/PSR TM (Primary Side Regulation) CV/CC Controller |
Codice articolo simile - SF5920S |
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