NCL2801CDADR2G ON Semiconductor

Power Factor Controller, High-Efficiency, Enhanced for Lighting NCL2801 The 8pin PFC controller NCL2801 is designed to drive PFC boost www.onsemi.com stages. It is based on an innovative Valley Count Frequency Foldback (VCFF) method. The circuit classically operates in Critical conduction Mode (CrM) for high load values. When the load decreases a Discontinuous Conduction Mode DCM is forced by 8 forcing a dead time which, by construction corresponds to a fixed 1 number of valleys. The lower the output power, the higher the number SOIC8 of valleys corresponding to the dead time. After DCM works down to CASE 751 th 6 valley switching and if the load continues to decrease, a dead time th is continuously added to the 6 valley. The end of additional dead time is synchronized with the drain voltage valley. The maximum MARKING DIAGRAMS switching period is limited to 36.5 s. VCFF maximizes the 8 efficiency during DCM and light load. In particular, the standby losses are reduced to a minimum. Like in FCCrM controllers, internal L2801abc circuitry allows nearunity power factor even when the switching ALYW frequency is reduced. Housed in a SO8 package, the circuit also incorporates the features necessary for robust and compact PFC stages, with few external components. 1 General Features L2801abc = Specific Device Code NearUnity Power Factor A = Assembly Location L = Wafer Lot Critical Conduction Mode (CrM) Y = Year Valley Count Frequency FoldBack (VCFF) W = Work Week = PbFree Package Peak Current Control Mode to Maintain a Proper Current Shaping in VCFF Mode Fast Line / Load Transient Compensation (Dynamic Response PIN CONNECTIONS Enhancer) Option 1 FB VCC Brownout Detection VCTRL DRV Twolevel Line FeedForward (HL&LL) MULT GND Valley Turnon (No Valley Hoping by Construction) CS ZCD High Drive Capability: 500 mA / +800 mA (Top Views) V Range: from 10.5 V to 27 V CC Low Startup Consumption for : *C* & *D* Option: Low V Startup Level (12.5 V) CC ORDERING INFORMATION *A* & *B* Option: High V Startup Level (17.0 V) See detailed ordering and shipping information on page 25 of CC this data sheet. *E* & *F* Option: High V Startup Level (10.5 V) CC This is a PbFree Device Semiconductor Components Industries, LLC, 2018 1 Publication Order Number: September, 2019 Rev. 3 NCL2801/DNCL2801 Safety Features Typical Applications Thermal Shutdown PC Power Supplies Nonlatching, OverVoltage Protection (3 Prog Levels) Lighting Ballasts (LED, Fluorescent) Over Current Limitation Flat TV Low DutyCycle Operation if the Bypass Diode is All Off Line Appliances Requiring Power Factor Shorted Correction Several product configurations coded with three letters Open Ground Pin Fault Monitoring (L ,L L ) marked on the package will be available 1 2, 3 Pin CS shorted to GND or open Monitoring Pin ZCD open tested before controller starts Controller not allowed to start if MULT pin is left open ST Table 1. NCL2801 1 LETTER CODING OF PRODUCT VERSIONS L Soft OVP (% of V ) Fast OVP (% of V ) 1 REF REF A Disabled 112.5 B Disabled 110.0 C (default) 105.0 107.0 1. The NCL2801 SO8 package is marked L L L 1 2 3 ND Table 2. NCL2801 2 LETTER CODING OF PRODUCT VERSIONS L2 VCC Startup Level (V) DRE (After Startup) DRE (During Startup) A 17.0 NO YES B 17.0 YES YES C 12.5 NO YES D (default) 12.5 YES YES E 10.5 NO YES F 10.5 YES YES 2. The NCL2801 SO8 package is marked L L L 1 2 3 RD Table 3. NCL2801 3 LETTER CODING OF PRODUCT VERSIONS L Brownin & Brownout Line Range Detection w/ 2level Line FeedForward 3 A (default) YES YES B YES NO C NO YES D NO NO www.onsemi.com 2