Features

• Valley Synchronized Frequency Fold−back (VSFF):

♦ CrM at Heavy Load

♦ DCM at Light Load by Dead Time Control

♦ Valley Switching in Both CrM and DCM

• On−time Modulation for High PFC in Both CrM and DCM

• Follower Boost Capability (NCP1623A Only)

♦ Lowered Output Voltage Regulation at Low Line

♦ High−Efficient Boost Stage and Downsized Inductor Design

• Skip Mode for Light Load Regulation

• Sleep Mode with Low Current Consumption (SOIC8 Only)

• Fast Line / Load Transient Control

♦ Dynamic Response Enhancer at Output Undershoot

♦ Soft OVP and Fast OVP at Output Overshoot

• Excessive Current Protection

♦ Over Current Protection (OCP)

♦ Over Stress Protection (OVS)

• Brown Out Protection

• Second Over Voltage Protection (OVP2)

• These are Pb−Free Devices

Typical Applications

• USB−PD

• Flat TV

• Industrial Power Supplies

• All Off−line Appliances Requiring Power Factor Correction

NCP1623ASNT1G属于集成电路（IC） > PFC（功率因数校正）。安森美半导体公司制造生产的NCP1623ASNT1GPFC（功率因数校正）功率因数校正 (PFC) 是用于调整交流电路中的电压和电流之间的相位角，使之趋近于零的半导体器件。不同模式包括平均电流、边界导通、连续导通、临界导通、电流控制式频率折返、不连续和不连续导通，开关频率从 6 kHz 至 1.7 MHz 可调。