NCP1618 Datasheet | onsemi

DATA SHEET .onsemi. High-Voltage, Multimode Power Factor Controller The NCP1618 is an innovative multimode power factor controller. The circuit naturally transitions from one operation mode to another depending the switching period duration so that the efficiency is optimized over the line/load range. In very- light- load conditions, the circuit can enter the soft- SKIP mode for minimized losses. Housed in a SO- 9 package, the circuit further incorporates the Features necessary for robust and pact PFC stages, with few external ponents. Multimode Operation - Multimode Operation for Optimized Operation over the Line/Load Range:  Continuous Conduction Mode (CCM) in Heavy- Load Conditions  Frequency- Clamped Critical Conduction Mode (FCCr M) in Medium- and Light- Load Conditions  FCCr M: Critical Conduction Mode (Cr M) when the Cr M Switching Frequency is Lower than 130 k Hz, Discontinuous Conduction Mode (DCM) at 130 k Hz Otherwise  DCM Frequency Reduction in Light Load Conditions  Minimum DCM Frequency Forced above 25 k Hz  Valley Turn- On in FCCr M  Soft- SKIP Mode in Very Light Load Conditions - Near- Unity Power Factor in All Modes (Except Soft- SKIP Mode) - Firm Control of the Switching Frequency between 25 k Hz and 130 k Hz General Features - High- Voltage Start- Up Current Source for VCC Capacitor Charge at Startup - Internal pensation of the Regulation Loop - X2 Cap Discharge Function - Fast Line / Load Transient pensation (Dynamic Response Enhancer) - Large VCC Operating Range (9.5 V to 35 V) - Line Range Detection - pfc OK Signal For Enabling/Disabling the Downstream Converter - Jittering for Easing EMI Filtering Protection Features - Soft- and Fast- Overvoltage Protection - Line- Sag and Brown- Out Detection - 2- Level Over Current Detection - Bulk Under- Voltage Detection - OVP2: Redundant Over- Voltage Protection Using the ZCD Pin - Thermal...