NCP1612B Datasheet | onsemi

DATA SHEET .onsemi. Enhanced, High‐Efficiency Power Factor Controller NCP1612A, NCP1612B, NCP1612A1, NCP1612A2, NCP1612A3, NCP1612B2 The NCP1612 is designed to drive PFC boost stages based on an innovative Current Controlled Frequency Fold-back (CCFF) method. In this mode, the circuit classically operates in Critical conduction Mode (Cr M) when the inductor current exceeds a programmable value. When the current is below this preset level, the NCP1612 linearly decays the frequency down to about 20 k Hz when the current is null. CCFF maximizes the efficiency at both nominal and light load. In particular, the stand-by losses are reduced to a minimum. Like in FCCr M controllers, an internal circuitry allows near-unity power factor even when the switching frequency is reduced. Housed in a SO-10 package, the circuit also incorporates the Features necessary for robust and pact PFC stages, with few external ponents. General Features - Near-unity Power Factor - Critical Conduction Mode (Cr M) - Current Controlled Frequency Fold-back (CCFF): Low Frequency Operation is Forced at Low Current Levels - On-time Modulation to Maintain a Proper Current Shaping in CCFF Mode - Skip Mode Near the Line Zero Crossing - Fast Line/Load Transient pensation (Dynamic Response Enhancer) - Valley Turn On - High Drive Capability: -500 m A/+800 m A - VCC Range: from 9.5 V to 35 V - Low Start-up Consumption - Six Versions: NCP1612A, B, A1, A2, A3 and B2 (see Table 1) - Line Range Detection - pfc OK Signal - This is a Pb-Free Device SOIC-10 CASE 751BQ MARKING DIAGRAM 1612x ALYW G 1 1612x A L Y W G = Specific Device Code x = A, A1, A2, A3, B or...