High Efficiency, Low Standby PFC Adapter
■ The NCP1616 is a high voltage PFC controller designed to drive boost PFC stages based on an innovative Current Controlled Frequency Foldback (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 NCP1616 linearly decays the frequency down to a minimum of about 26 kHz when the input current is zero. CCFF maximizes the efficiency at both nominal and light load. In particular, the standby losses are reduced to a minimum. An innovative circuitry allows near-unity power factor even when the switching frequency is reduced.
■ The integrated high voltage startup circuit eliminates the need for external startup components and consumes negligible power during normal operation. Housed in a SOIC-9 package, the NCP1616 incorporates the features necessary for robust and compact PFC stages, with few external components.
●Key Features:
■High Voltage Startup Circuit with Integrated Brownout Detection
■Critical Conduction Mode (CrM)
■Novel CCFF Based Control Scheme Maximizes Efficiency Across Line and Load
■Valley Switching for Improved Efficiency
■Skip Mode Near the Line Zero Crossing
■Fast Line/Load Transient Compensation
■Input Voltage Range Detection
■Integrated Input X2 Capacitor Discharge Circuitry and Standby Mode Enable Very Low Standby Power
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[ Adapter ] |
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Application note & Design Guide |
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Please see the document for details |
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SMA;SOT-23;SOIC-9 |
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English Chinese Chinese and English Japanese |
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April 2019 |
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Rev. 0 |
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DN05127/D |
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1.2 MB |
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