FAN7387MX Integrated Circuits (ICs)

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FAN7387MX is a single-chip LED controller from Fairchild Semiconductor. Its applications lie in lighting control, such as LED bulbs, LED tubes, LED light strips, and LED spotlights. In addition, FAN7387MX can also be used for motor control, such as brushless DC motor (BLDC) and stepper motor control. This chip is a high-efficiency, low-cost, small-sized device with a variety of features such as wide-dimming range, high-current dimming and overload protection.

The FAN7387MX has been developed to provide a single-chip solution for LED lighting control, LED ballast and lighting equipment control. This chip provides a 5-bit gray scale circuit, an LED driver section and a thermal protection circuit.

First, the 5-bit gray scale circuit is an 8-bit resolution analog-to-digital converter. It converts the analog values from a potentiometer or current sensing circuit and outputs a digital value representing the current luminance level of the lighting device. This implementation ensures precise dimming even with different steps, allowing for a wide range of dimming levels.

Secondly, the LED driver section consists of two MOSFETs connected in series, which provides adjustable voltage for driving the LEDs. The user can adjust the drive current via an external resistor. In addition, this chip also supports PWM dimming and pulse skip dimming, allowing for the smooth dimming control.

Finally, the thermal protection circuit can detect an over-temperature in the system and disable the output transistors to protect the chip from damage. The user can set the threshold by external resistor to prevent such an event.

FAN7387MX is a highly integrated and cost-effective solution for controlling LED lighting and motor systems. Its simple and intuitive design makes it suitable for different applications with different requirements. It is designed to meet the most stringent lighting control requirements and is ideal for applications such as LED bulbs, LED tubes, LED strip lights, LED spotlights and motor control.

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