FAN9611MX Integrated Circuits (ICs)

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FAN9611MX is a Pulse Width Modulator (PWM) controller for power factor correction. It was developed to meet the need for high efficiency, low cost, and small form factor designs. The device is designed for use in power supplies and switch mode power converters, providing PFC operations and modulation control of a single power factor corrected buck or boost converter.

The FAN9611MX is a powerful, low-cost PFC controller with low reference voltage and low startup current. It is designed to meet international power factor standards and has over voltage protection and current limiting. The device operates with high efficiency and low switching losses. It has programmable soft-start, over temperature protection and can be driven with various topologies up to 500 kHz.

PMIC - PFC (Power Factor Correction) is a technique used in power supplies to reduce the amount of reactive power present in the system. It improves the power factor of an AC supply, reduces harmonic distortion and energy losses. The FAN9611MX offers a simple, accurate and cost-effective solution for PFC requirements.

The FAN9611MX features a voltage-mode power factor correction (VMPFC) architecture to achieve accurate operation over the input operating range. The PFC controller monitors the current and voltage of the power supply input, and adjusts the duty cycle of the converter accordingly to maintain constant voltage and current over the full line range. This ensures that the input voltage and current drawn from the power source remain in-phase and yields a unity power factor.

The FAN9611MX integrates an analog error amplifier, a PWM comparator, a peak current comparator, a protected MOSFET driver, a deadtime generator, UVLO and OVP circuitry into a single monolithic IC. The PWM comparator controls the on-time of the power switch by comparing the voltage error signal across the feedback resistors and the voltage reference. The peak current comparator senses the peak inductor current and adjusts the duty cycle accordingly, forcing the PFC stage to operate at the threshold current and to reduce over-current conditions.

The advanced features of the FAN9611MX provide improved performance in terms of efficiency, power factor correction accuracy, and durability. The device provides a static boost voltage to increase the current and voltage output above the input voltage for better power factor correction, and also features a programmable line over-voltage protection which is adjustable within 0.5-4V.

The FAN9611MX is an ideal solution for power engineers looking for improved performance and maximum power delivery in power supplies and other related products. The decreased board size, improved efficiency, and flexibility make this device an excellent choice for power factor correction.

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