NCP1601APG

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The NCP1601APG is a critical component in power factor correction (PFC) power supply design. This advanced PFC controller operates in an input voltage range of 80V to 400V and allows for the implementation of PFC designs with high efficiency and high power reliability. It is designed to provide a constant output power factor, even in the presence of input voltage variations. The device offers a wide range of features that make it suitable for several applications such as telecom, industrial UPS, welders, and other no-load start systems. In this article, we will explore the applications and working principles of the NCP1601APG.

Applications of the NCP1601APG

The NCP1601APG’s wide input voltage and output voltage range makes it suitable for a wide range of applications. It is widely used for quasi-resonant mode PFC designs. Such designs are widely used in telecom, industrial UPS, welders, and other no-load start systems which require consistently high power factor and efficiency. The NCP1601APG also supports various circuit topologies like critical conduction mode, and valley-switched PFC. The device also supports critical conduction mode operation, which minimizes input current at light load and improves on efficiency slightly. Moreover, its minimum start up voltage ensures reliable operations in cases where intermittent power utility events occur. The device is also capable of detecting frequencies below 20Hz, which is essential in applications dealing with transformer-less solutions. Its light load efficiency optimizer enables the device to adjust its light load current in order to increase efficiency in full load and lighter loads. This is beneficial in cases where maximum power efficiency is required.

Working Principle of the NCP1601APG

The NCP1601APG is a voltage-mode, quasi-resonant type PFC controller. Its voltage-mode control technique ensures low system ripple current, thus resulting in lower EMI emissions. It has an internal linear regulator which helps maintain a constant peak current source to the inductor. The device has an internal frequency jittering module, allowing for reduced switching losses. The power factor is regulated by comparing a voltage signal obtained from the primary side to a reference voltage. As a result, the internal peak current level can be adjusted to maintain a desired power factor. In addition, the NCP1601APG also incorporates an adjustable over-voltage protection circuit. This circuit monitors the output voltage and adjusts the over-voltage threshold depending on the operating conditions of the system. The over-voltage protection feature prevents damage to the system components due to sudden load transients and other unexpected events.

Conclusion

The NCP1601APG PFC controller is capable of providing high power factor, improved EMI and high system efficiency for a range of applications. Its wide input voltage range and adjustable over-voltage protection makes it suitable for operating in harsh conditions. Its internal peak current regulator and frequency jittering module enables it to maintain a desired power factor and reduce switching losses. As a result, the NCP1601APG provides an excellent solution for many power conversion applications.

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