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NCP1611ADR2G Datasheet(PDF) 1 Page - ON Semiconductor |
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NCP1611ADR2G Datasheet(HTML) 1 Page - ON Semiconductor |
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1 / 28 page  © Semiconductor Components Industries, LLC, 2011 December, 2011 − Rev. 1 1 Publication Order Number: NCP1611/D NCP1611 Enhanced, High-Efficiency Power Factor Controller The NCP1611 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 (CrM) when the inductor current exceeds a programmable value. When the current is below this preset level, the NCP1611 linearly decays the frequency down to about 20 kHz 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 FCCrM controllers, internal circuitry allows near−unity power factor even when the switching frequency is reduced. Housed in a SO−8 package, the circuit also incorporates the features necessary for robust and compact PFC stages, with few external components. Features • Near−Unity Power Factor • Critical Conduction Mode (CrM) • 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 Compensation (Dynamic Response Enhancer) • Valley Turn on • High Drive Capability: −500 mA / +800 mA • VCC Range: from 9.5 V to 35 V • Low Start−up Consumption • A Version: Low VCC Start−up Level (10.5 V), B Version: High VCC Start−up level (17.0 V) • Line Range Detection • This is a Pb−Free Device Safety Features • Non−latching, Over−Voltage Protection • Brown−Out Detection • Soft−Start for Smooth Start−up Operation (A version) • Over Current Limitation • Disable Protection if the Feedback Pin is Not Connected • Thermal Shutdown • Low Duty−Cycle Operation if the Bypass Diode is Shorted • Open Ground Pin Fault Monitoring Typical Applications • PC Power Supplies • All Off Line Appliances Requiring Power Factor Correction SOIC−8 CASE 751 SUFFIX D PIN CONNECTIONS MARKING DIAGRAM (Top View) http://onsemi.com 1 8 NCP1611x = Specific Device Code x = A or B A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb−Free Package NCP1611x ALYW G 1 8 See detailed ordering and shipping information in the package dimensions section on page 27 of this data sheet. ORDERING INFORMATION Feedback VCC DRV GND Vcontrol Vsense FFcontrol CS/ZCD 1 |
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