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NCP1611

ON Semiconductor
Part Number NCP1611
Manufacturer ON Semiconductor
Description High-Efficiency Power Factor Controller
Published Sep 5, 2019
Detailed Description NCP1611 Enhanced, High-Efficiency Power Factor Controller The NCP1611 is designed to drive PFC boost stages based on a...
Datasheet PDF File NCP1611 PDF File

NCP1611
NCP1611

Overview
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 www.
onsemi.
com programmable value.
When the current is below this preset level, the NCP1611 linearly decays the frequency down to about 20 kHz when MARKING the current is null.
CCFF maximizes the efficiency at both nominal DIAGRAM 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 8 1 SOIC−8 CASE 751 SUFFIX D 8 NCP1611x ALYW G 1 NCP1611x = Specific Device Code x = A or B A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb−Free Package Operation is Forced at Low Current Levels • On−time Modulation to Maintain a Proper Current Shaping in CCFF Mode PIN CONNECTIONS Vcontrol 1 Feedback • Skip Mode Near the Line Zero Crossing Vsense VCC • Fast Line / Load Transient Compensation (Dynamic Response FFcontrol DRV Enhancer) CS/ZCD GND • Valley Turn on (Top View) • High Drive Capability: −500 mA / +800 mA • VCC Range: from 9.
5 V to 35 V • Low Start−up Consumption ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 28 of this data sheet.
• A Version: Low VCC Start−up Level (10.
5 V), B Version: High VCC Start−up level (17.
0 V) • Line Range Detection • Configurable for Low Harmonic Content across Wide • Low Duty−Cycle Operation if the Bypass Diode is Line/Load ...


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