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产品推荐

SF5920S

    SF5920S is a high performance, cost efficiency,highly integrated DCM(Discontinuous Conduction Mode)Primary Side Regulation (PSR)controller for Offline LED lighting 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/PSRTM 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), VCC Over Voltage Protection (OVP), Cycle-by-cycle Current Limiting (OCP), All Pins Floating Protection, Over Load Protection (OLP), RT Pin Short-to-GND Protection, Gate Clamping, VCC Clamping, Leading Edge Blanking (LEB). 
    SF5920S is available in SOT23-5 packages.
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SFL678

    SFL678 is a high precision AC/DC offline PSR (Primary Side Regulation) controller for LED luminaries. The IC can provide very tight (less than 3%) constant current control (CC) ideal for LED lighting applications. 
    SFL678 uses Pulse Frequency Modulation (PFM) control to improve efficiency and eases system EMI design. The IC dramatically lower system cost by eliminating secondary feedback circuits.The wide VDD operating range (10V to 30V, typical) of SFL678 can ease flexible LED system design. The IC also has built-in soft start function to soften the stress on the MOFET during power on period. 
    SFL678 integrates functions and protections of Under Voltage Lockout (UVLO), VDD Over Voltage Protection (VDD OVP), LED Open/Short circuit protection,Soft start Control, cycle-by-cycle Current Limiting (OCP), pins Floating Protection, Gate Clamping, VDD Clamping. 
    SFL678 is available in SOT23-6 packages.
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SFL980

    SFL980 integrates a 700V startup device, the IC can startup in 100ms, is optimized for isolated Flyback topology LED constant current (CC) controller, with high PF value and low THD, is suitable for LED lighting area. The IC adopts proprietary "super-PFC/PSRTM" control and "min-THDTM" technology, makes efficiency up to 90%, PF value larger than 0.92, THD lower than 10% and ±4% CC accuracy for mass production.  
    Built-in proprietary high precision closed-loop constant current control, SFL980 supports QR and DCM mode with input and output compensation increasing LED CC accuracy. Max frequency is clamped to 90KHz, resulting good EMI performance. SFL980 adopts QR control, turns GATE on at valley to decrease switch consumption, and the efficiency is increased. 
    SFL980 integrates functions and protections of Under Voltage Lockout (UVLO), LED Open/Short Protection, VCC Over Voltage Protection (OVP), Load Over Voltage Protection (Load OVP), Soft Start, Cycle-by-cycle Current Limiting (OCP), Burst Mode Control @ Light Loading, GD Clamping, VCC Clamping, etc.  
    SFL980 is available in SOP-8 packages.
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SF6778S

    SF6778S is a high performance, highly integrated QR (Quasi Resonant Mode) and Primary Side Regulation (PSR) power switch for offline small power converter applications.  
    SF6778S has proprietary super-QR/PSRTM control for high efficiency and low EMI, which can ensure system to meet EPS Level 6 energy standard. The IC also has built-in cable drop compensation function to achieve excellent CV performance.  
    SF6778S uses Multi Mode Control to improve efficiency and reliability and to decrease audio noise energy @ light loadings. SF6778S also integrates the function of "Max. Frequency Clamping @ Output Short Circuit" to limits power MOSFET Vds spike when output short circuits occurs. 
    SF6778S integrates functions and protections of FB Short Protection, 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, VDD Clamping.  
    SF6778S is available in DIP8 packages.
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SF5938S

    SF5938S is a high performance, highly integrated DCM (Discontinuous Conduction Mode) Primary Side Regulation (PSR) power switch for offline small power converter applications. It can achieve less than ±4% CV/CC precision. 
    SF5938S has built-in proprietary NC-Cap/PSR-IITM control for CV control, which eliminates external compensation or filtering capacitor. It has built-in cable drop compensation function, which can provide excellent CV performance. The IC uses Multi Mode Control to improve efficiency and reliability and to decrease audio noise energy @ light loadings. The IC can achieve less than 70mW standby power.  
    SF5938S integrates proprietary "Audio Noise Cancellation" control for audio noise free operation. The IC has built-in "Fast Dynamic Response" control to meet USB Charge requirements. SF5938S also integrates proprietary "Zero-Output Startup" control to achieve startup when output is near zero voltage. The IC has proprietary "Smart Output Short Protection", which can protect the system with large leakage inductance when output is short circuit. 
    SF5938S integrates functions and protections of FB Short Protection, Under Voltage Lockout (UVLO), VDD Over Voltage Protection (VDD OVP), Soft Start, Cycle-by-cycle Current Limiting (OCP), Pin Floating Protection, VDD Clamping.  
    SF5938S is available in DIP8 packages.
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