FAN6961DY

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Power factor correction (PFC) is a technique used in power transfer systems in which it controls the amount of power delivered to a load by controlling the level of current flowing in the system. It is done by controlling the voltage across the system, and it achieves better power efficiency by dissipating less heat. The FAN6961DY is an integrated PFC and integrated high-side gate driver system-on-a-chip (SOC) device for high frequency power conversion systems.

The FAN6961DY is a PFC controller IC specifically designed for high-efficiency full-bridge power factor correction (PFC) rectifiers. The device contains a controller, a high-side driver and an adjustable voltage regulator (AVR). It provides high-performance and accurate power factor correction and is compliant with IEC61000-3-2, Class D standards. It can be used with a variety of power switches to provide very high efficiency when used in the boost topology.

The FAN6961DY operates in current-mode with a feedback control loop. It adjusts the duty cycle of the PFC converter bridge to maintain the voltage gain VD at a constant level. The converter typically runs at a switching frequency around 20 kHz to minimize conducted noise. Adjustment of the gain level is done with an external reference voltage, which is equal to the required bus voltage level.

The FAN6961DY works in current-mode and uses a regular loop filter to drive the FB1 pin and the AVR pin to achieve the optimal output voltage. The device also has an internal auto-restart mode to prevent any UNDER_VOLTAGE LOCKOUT (UVPOL) issues. The device also offers integrated lead-lag compensation, which can be adjusted and tuned according to the grid connection and the load requirements.

The FAN6961DY can also be used for other applications such as active power factor correction, DC/DC Buck converters, and AC/AC converters. With the integrated high side driver, it can also be used for power supplies, such as adapter chargers and SMPS. Furthermore, it can be used for solar power systems, which needs maximum power point tracking (MPPT) integrated into the system.

The FAN6961DY is suitable for designs that need high-efficiency, low-cost and low-EMI performance. It also provides high-type performance and system integration benefits. It requires minimum external components, and it can be programmed to achieve the best power efficiency, while still meeting EMI standards.

In summary, the FAN6961DY is a power factor correction and integrated high-side gate driver system-on-a-chip device that offers higher performance, lower cost and lower EMI performance compared to traditional PFC controllers. It can be used for many applications such as active PFC, DC/DC Buck converters, AC/AC converters, SMPS and solar inverters. It offers high-efficiency and maximum power point tracking (MPPT). It also provides a high-type performance and system integration benefits with minimal external components, and is highly programmable for optimal power efficiency and EMI compliance.

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