UCC2817AD

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UCC2817AD is a kind of power factor correction (PFC) control integrated circuit designed by Texas Instruments for offline or DCM flyback converters. It has a wide set of features, making it a popular one in many different applications marketplaces.

Based on its simplified working principle, the UCC2817AD PFC provides the basic framework for efficient power factor correction in applications such as LED drivers, telecom, medical and other commercial and industrial applications. By manipulating the duty cycle and frequency of its input pulses, the UCC2817AD maintains sinusoidal input current, thus improving overall efficiency, power factor and reducing harmonic distortion generated by the power supply.

This control IC also provides users with built-in soft-start and under-voltage lockout capabilities, as well as programmable current and voltage feedback control. Other features include programmable line-feedforward, frequency folding and burst mode operation. In addition, the UCC2817AD is protected by overload protection, short circuit protection, and open-loop protection, making it a highly reliable solution for power factor correction applications.

Different applications may require different operating ranges for the UCC2817AD, and the power supply design should take into account the input voltage, output voltage, switching frequency, load type and current range. Generally, the UCC2817AD is ideal for input voltages of up to 75V, output voltages of up to 40V and switching frequencies of up to 1 MHz. It can also work at extremely low switching frequencies, making it a suitable choice for universal input applications.

As a single-stage PFC control IC, UCC2817AD provides an all-in-one solution with built-in soft-start, overcurrent protection and closed-loop voltage feedback. With its small package size, easy implementation and reliable operation, the UCC2817AD is increasingly adopted for various power supply designs in today’s market.

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