NCP1615C5DR2G

Series:	--
Part Status:	Active
Mode:	Current Controlled Frequency Foldback (CCFF), Critical Conduction (CRM)
Frequency - Switching:	26kHz
Current - Startup:	12mA
Voltage - Supply:	9.5 V ~ 28 V
Operating Temperature:	-40°C ~ 125°C

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Introduction

Power Factor Correction (PFC) is a key component in modern power supply systems. The object of PFC is to correct distorted input power factors and improve power utilization. The NCP1615C5DR2G is an integrated PFC controller with instant PFC function released by ON Semiconductor. The NCP1615C5DR2G offers several protections functions including over voltage protection, over temperature protection and over current protection, etc.

Application Field

The NCP1615C5DR2G is mainly used in 100W-350W range of power supply systems for standby, standby plus, low-power passive, active-load, high line, and universal AC input levels. It can be widely used in desktop and notebook adapter, 3C products power supply, telecom power, server and lighting power, etc.

Working Principle

The NCP1615C5DR2G includes an integrated PFC controller and an adjustable gate MOSFET drive. In PFC operation mode, the NCP1615C5DR2G continuously control the inductor current to keep the input power factor close to unity. The peak inductor current is used to detect the power line voltage, working with a voltage reference, it can evaluate the voltage error and then adjust the duty cycle of the IC.The integrated MOSFET gate drive provides a proper gate drive voltage to the external MOSFET. Its operation is related to the voltage seen at its voltage sense pin. The MOSFET turn-off is synchronized to the trailing edge of the leading pulse. Since there is an internal compensation loop, the device can work for both Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM).

Conclusion

In conclusion, the NCP1615C5DR2G is a high performance PFC controller with various protection features, wide applications and high accuracy in power factor correction, low power consumption, and reliability. It is the ideal choice for power supplies from 100W-350W range for desktop and notebook adapter, 3C products power supply, telecom power, server and lighting power, etc.

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