FAN6961CSY

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Power Factor Correction (PFC) is a technology that assists in correct the output power and energy efficiency of electrical loads. This technology is implemented with power factor correction devices, such as FAN6961CSY, that correct the power factor at the load and reduce total harmonic distortion. This helps ensure electrical efficiency in the power delivery systems, and is the most popular technology in Power Management IC (PMIC) market.

The FAN6961CSY applications include implementing Power Factor Correction (PFC) to a power delivery system. This integrated circuit offers a complete solution for power factor correction. The FAN6961CSY integrates three main stages: a critical conduction mode (CRM) PFC controller, a half-bridge MOSFET driver, and an over current protection circuit. The integrated PFC controller of the FAN6961CSY utilizes a PFC switching architecture that provides accurate power factor correction, phase shift and load regulation. Furthermore, the device’s half-bridge MOSFET driver is used to drive the internal MOSFET’s of the power supply, and accompanied by a bunch of integrated protections.

The working principle of the FAN6961CSY is to sense the input voltage and current, estimate the output power, and provide the proper duty cycle to the internal MOSFETs or the external MOSFETs. The PFC circuit operates in a critical conduction mode to maximize its efficiency and energy efficiency. The variations of the input voltage are compensated by an adaptive voltage compensation loop to reduce the PFC output voltage ripple. Additionally, the input current is controlled by a constant current loop to achieve the desired power factor.

The output voltage is monitored and regulated by a voltage loop that is in charge of stabilizing the output voltage over the full load conditions. Furthermore, the FAN6961CSY offers integrated frequency jitter to reduce electromagnetic interference. Additionally, an over voltage protection circuit is embedded in the device to prevent over voltage conditions. The over current protection is activated when an over current condition is detected and the power supply is powered down to prevent damage.

The FAN6961CSY is a complete PFC solution that combines power factor correction, phase shift and load regulation, and protection functions in one package. The device’s integrated PFC controller utilizes a critical conduction mode that maximizes efficiency and energy efficiency. The device also features adaptive voltage compensation and constant current loop for controlling the input voltage and current accuracy. Moreover, the device includes integrated frequency jitter and over voltage protection for safe operation.

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