FAN7530MX Integrated Circuits (ICs)

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In the design of power systems, the power factor of the power source is usually corrected by the power factor correction (PFC) technique. The FAN7530MX is a monolithic PFC controller for various power applications. It is capable of providing excellent power factor correction (PFC) performance for offline power systems, delivering power outputs up to 100W.

Application Field of FAN7530MX
The FAN7530MX is a highly integrated PFC controller, offering superior performance and additional features such as:

• High power factor with less than 5% total harmonic distortion (THD)
• Excellent load and line regulation
• Wide input voltage range
• High integration level (60V high voltage power MOSFETs, a high performance buck conversion regulator, a synchronous rectifier, etc.)
• Low power dissipation

The FAN7530mx offers a wide range of application fields such as lights, adapters, chargers, etc.

Working principle of FAN7530MX
The FAN7530MX is a high performance PFC controller with a high power factor. The controller is composed of input AC rectification circuit, DC-DC boost converter, error amplifier, oscillator and gate driver.

The main purpose of the PFC controller is to maintain a high power factor, by converting input current harmonics to a steady DC voltage with less than 5% THD.

The FAN7530MX utilizes a 120° single ended PFC topology, which provides high power factor with excellent line and load regulation. The topology uses a two-stage circuit configuration, which is composed of an input AC rectification circuit and a DC-DC boost converter. The output voltage is regulated by controlling the duty cycle of the boost converter.

The input rectification circuit is a full-wave rectification circuit with a single phase diode bridge. The current input is transformed into a DC voltage, which is then fed to the DC-DC boost converter. The boost converter increases the DC input voltage and generates a steady DC output voltage.

The PFC controller also offers a low-power, highly accurate error amplifier to accurately measure and compare the output voltage to a reference voltage. The error amplifier drives the oscillator, which is used to generate a pulse width modulation (PWM) signal. The PWM signal is used to control the duty cycle of the boost converter, which allows the error amplifier to accurately regulate the output voltage.

The FAN7530MX also includes a gate driver to control the operation of the power MOSFETs of the input diode bridge and the DC-DC boost converter. The driver is powered by a low voltage regulator and provides fast switching speeds and low losses.

The FAN7530MX is an integrated PFC controller that can provide excellent power factor correction performance with less than 5% total harmonic distortion (THD). It offers high performance, high power factor and wide input voltage range, meeting the requirements of various applications.

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