NJM3717FM Integrated Circuits (ICs)

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The NJM3717FM is a low-voltage fan motor controller integrated circuit (IC) designed to efficiently control the speed and rotation of a DC motor. It is an ideal choice for controlling fan motors that require low torque and low power consumption. The NJM3717FM is a drop-in replacement for most fan controller ICs, providing better performance and cost savings. The NJM3717FM features low-voltage operation, fast start-up time, and high current accuracy.

The NJM3717FM controller utilizes a patented low-voltage fan motor control technology to offer improved performance and cost savings for fan motor applications. The low-voltage operation of the NJM3717FM reduces the number of components required for controlling the fan motor, thereby providing design flexibility and cost savings. The NJM3717FM features a quasistable current control scheme to provide high current accuracy and smooth motor speed control. Additionally, the NJM3717FM includes a dynamic current feedback loop to ensure precise current regulation and quick start-up time.

In addition to providing accurate current regulation and quick start-up time, the NJM3717FM also offers flexible and optimized motor control options. The NJM3717FM includes several operating modes such as Constant Speed control, Designated Speed control, and Speed Increase/Decrease control. Additionally, multiple motor drive configurations such as a constant voltage, constant current, and pulse width modulation (PWM) types can be programmed in the NJM3717FM IC. The built-in auto-shutdown and auto-start functions provide a safe and reliable operation and prevent any damage to the motor.

To determine the maximum speed and current of the motor, the NJM3717FM requires two control inputs, such as a control voltage or temperature. The control signal can be generated from an external control circuit or from an internal reference voltage. The magnitude and polarity of the control signal can be programmed in the NJM3717FM to adjust the fan speed. The built-in temperature sensing circuit on the NJM3717FM can also be used to monitor the motor temperature and adjust the fan speed accordingly.

The NJM3717FM is a versatile and cost-effective solution for controlling fan motors. It includes various operating modes, multiple motor drive configurations, and built-in temperature sensing that offer increased control and flexibility. The low voltage operation and high current accuracy of the NJM3717FM make it the ideal choice for controlling fan motors that require low torque and low power consumption.

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