ICE3A5565I

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The ICE3A5565I is an offline Power Factor Correction Integrated Circuit (PFC IC). It is designed to regulate power with high efficiency, in order to reduce electricity consumption and emissions, by optimally controlling energy in AC/DC power sources. It belongs to the family of PMIC - AC DC Converters, Offline Switchers.

The ICE3A5565I is designed to meet increasing standards of energy efficiency and is suitable for various applications in regulated offline Power Factor Correction AC-DC circuits. It consists of a power PFC topology and an integrated high voltage Power MOSFET. With its operating frequency of 65kHz, it is able to achieve an excellent power factor of more than 0.96. The device has a wide operating range of 85VAC-435VAC and can support a range of 350W-700W power output. It features a high power conversion efficiency, typically up to 93%, which effectively reduces the power loss and improves the overall system power efficiency.

The ICE3A5565I can be applied to a wide range of applications including switched mode power supplies, uninterruptible power supplies, power adapters, and other AC-DC power systems. Its high performance enables it to be implemented in various kinds of power supplies, with minimal external components. The integrated feedback control loop is fully integrated and minimizes noise generation, thus increasing system reliability and safety.

Working Principle: The ICE3A5565I dynamically adjusts the average current flow through the boost inductor and the switching of the power MOSFET, such that it meets the target input power factor. The device consists of two parts, an AC/DC conversion circuit and a feedback control loop. The conversion circuit consists of the diode bridge rectifier, the boost inductor, the power MOSFET, the output filter capacitor and their associated components. The feedback control loop uses a steep ramping signal, generated by the internal ramp generator, to modulate the switching of the power MOSFET. This ramping signal is used to control the average value of the inductor current, thus controlling the average input power factor. The internal error amplifier compares the sensed inductor current to the reference voltage and manipulates the error signal based on the target input power factor. The output of the error amplifier modulates the current in the gate driver stage. This in turn controls the switching of the power MOSFET.

The ICE3A5565I combines the functions of AC/DC conversion, power factor correction, and current mode control, in one device. It is well-suited to high-power applications, with low power consumption and a high degree of integration. The device also features such valuable features as a high input voltage rating, short-circuit protection, soft-start, current limit and slew rate control.

In summary, the ICE3A5565I is a high-efficiency offline Power Factor Correction IC which belongs to the family of PMIC - AC DC Converters, Offline Switchers. It is designed to regulate power with high efficiency in order to reduce electricity consumption and emissions, by optimally controlling energy in AC/DC power sources. It has a wide operating range, high power conversion efficiency and many valuable features, making it an ideal choice for various kinds of AC-DC power systems.

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