FAN9673Q

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Power Factor Correction (PFC) is a commonly used technique to improve the efficiency of power supplies by reducing ac ripple and current distortion. It is used in a variety of applications such as electric motors, lighting, computing, communications, printing and other industrial applications. FAN9673Q is a high voltage, low ripple power conversion integrated circuit that integrates many features for PFCs, such as accurate and fast PFC precision current-sense feedback loop, good transient response, and over-current, over-temperature, and under-voltage protection.

The FAN9673Q is designed to work as a current mode controlled power factor corrector stage. It\'s internal circuitry ensures a line regulation of ±0.25%. The FAN9673Q uses an internal PFC power stage driver, with an adjustable 50 kHz to 200 kHz PFC switching frequency, which needs a minimum of external components. The PFC operating mode is current-mode control to provide good dynamic response. An external peak current-sense resistor is used for current-mode control, which provides a peak current signal that is used for controlling the pulse width modulator. The peak current-sense resistor should be lower than 10mA for a wide range of input voltage.

The FAN9673Q uses an internal linear regulator to provide a voltage of 2.25V, used to power its internal logic circuits. This device includes internal circuits for under-voltage lockout (UVLO) for both the PFC and its power stage driver, as well as a 4μA high current threshold PFC enable signal. Soft start and soft stop of PFC driver is also provided by the internal circuit of FAN9673Q.

The FAN9673Q can be used to reduce harmonic distortion in supply voltages, and to ensure high power factor in power supplies. It is designed to allow integration into systems which require high accuracy, fast transient response, and a wide power range. The device is ideal for applications such as consumer appliances, servers, printers, lighting and other industrial applications.

The FAN9673Q is designed to provide high efficient, low cost, and reliable performance. Its features allow for excellent efficiency and power factor, as well as improved transient response and fast switching. The device is capable of providing high performance and reliability over its wide input voltage range and high temperature range, making it ideal for consumer appliances, lighting and other industrial applications.

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