FEATURES
Proprietary “Audio Noise Cancellation” Control
◆ Built-in AC Line CC Compensation
◆ Proprietary “Zero-Output Startup” Control
◆ Proprietary “Smart Output Short Protection”
◆ 11.7V UVLO Hysteresis Window
◆ FB Short Protection
◆ Direct Drive of Low Cost BJT
◆ Proprietary NC-Cap/PSRTM Control
◆ Proprietary Cable Drop Compensation
◆ Multi Mode Control
◆ Wide VDD Operating Range (7V to 24V)
◆ ±5% CC and CV Precision
◆ Low Standby Power Under 70mW
◆ Compensate for Transformer Inductance Tolerances and Line Voltage Variation
◆ Cycle-by-Cycle Current Limiting
◆ Leading Edge Blanking (LEB)
◆ Built-in Soft Start
◆ Pin Floating Protection
◆ VDD UVLO, OVP & Clamp
APPLICATIONS
◆ Battery chargers
◆ Small power adapter
◆ AC/DC LED lighting
GENERAL DESCRIPTION SFK10 is a high precision, highly integrated DCM (Discontinuous Conduction Mode) Primary Side Regulation (PSR) controller for offline small power converter applications. It can directly drive power BJT, which can further lower system cost. The IC integrates proprietary “Audio Noise Cancellation” control for audio noise free operation. SFK10 has built-in proprietary NC-Cap/PSRTM 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. SFK10 integrates proprietary “Zero-Output Startup” control to achieve startup when output is near zero voltage. The IC also has proprietary “Smart Output Short Protection”, which can limit maximum power when output is short circuit. SFK10 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. SFK10 is available in SOT23-6 package.
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