NCP1616A1DR2G

PFC控制器, 9.5V至28V电源, 12mA启动, 2mA运行, 26kHz, NSOIC-9

The NCP1616 is a high voltage PFC controller designed to drive PFC boost stages based on an innovative Current Controlled Frequency foldback CCFF method. In this mode, the circuit operates in critical conduction modeCrM when the inductor current exceeds a programmable value. When the current is below this preset level, the NCP1616 linearly decays the frequency down to minimum of about 26kHz at the sinusoidal zero-crossing. CCFF maximizes the efficiency at both nominal and light load. In particular, the standby losses are reduced to a minimum. Innovative circuitry allows near-unity power factor even when the switching frequency is reduced. The integrated high voltage start-up circuit eliminates the need for external start-up 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.

Features |   | Benefits

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High Voltage Start-Up Circuit

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Improved efficiency at light load and fast startup time

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Critical conduction mode with current controlled frequency foldback

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Optimizes conversion efficiency across load range

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Integrated Input Filter Capacitor X2 Discharge Circuitry

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Improved light load efficiency and elimination of external resistors

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Dynamic Response Enhancer

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Improved transient response for line and load steps

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Soft Overvoltage Protection

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Reduces acoustic noise and stress in the event of an overvoltage fault

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-500 mA/+800 mA Drive Capability

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Supports wide range of MOSFETs and power levels

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AC Line Brownout Detection

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Protects boost stage power components during line fault conditions