SSC2005S

Critical Conduction Mode PFC Control IC SSC2005S General Description SSC2005S is a Critical Conduction Mode (CRM) control IC for power factor correction (PFC). Since no input voltage sensing and no auxiliary winding for inductor current detection are required, the IC allows the realization of low standby power and the low number of external components. The product achieves high cost-performance and high efficiency PFC converter system. Features and Benefits  Inductor Current Detection (No auxiliary winding required)  Low Standby Power (No input voltage sensing required)  Minimum Off-time Limitation Function to restrict the Rise of Operation Frequency  High Accuracy Overcurrent detection: −0.60 V ± 5 %  Protection Functions Overcurrent Protection (OCP) ------- pulse-by-pulse Overvoltage Protection (OVP) ------------ auto restart FB Pin Undervoltage Protection (FB_UVP) -------------------------------------------------- auto restart Thermal Shutdown Protection with hysteresis (TSD) -------------------------------------------------- auto restart Typical Application Circuit VAC BR1 DBYP L1 D1 D2 R2 C1 Q1 R1 R3 RCS C2 VOUT LINE GND DZCS R4 C5 External power supply Cｆ U1 CS 5 RDLY 4 NC GND 6 RT 3 RDLY OUT 7 COMP 2 RVS1 C4 C3 RT 8 VCC FB 1 RS SSC2005S RVS2 CP C6 CS Package SOIC8 Not to scale FB 1 COMP 2 RT 3 RDLY 4 8 VCC 7 OUT 6 GND 5 CS Electrical Characteristics  VCC pin Absolute Maximum Ratings, VCC = 28 V  OUT pin source current, IOUT(SRC...