FAN8413MX

Step Resolution:	--
Base Part Number:	FAN8413
Supplier Device Package:	8-SOP
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 95°C (TA)
Voltage - Load:	--
Voltage - Supply:	4 V ~ 28 V
Current - Output:	--
Applications:	Fan Controller
Series:	--
Technology:	--
Interface:	On/Off
Output Configuration:	Pre-Driver - Low Side (2)
Function:	Controller - Commutation, Direction Management
Motor Type - AC, DC:	Brushless DC (BLDC)
Motor Type - Stepper:	--
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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FAN8413MX Application Field and Working Principle

The FAN8413MX Power Management Integrated Circuit (PMIC) is a motor driver, controller, and companion power multiplexer designed to operate 3.3V motors up to 2A with PWM speed control. Typically employed in hard drives, the FAN8413MX enables fan speed control via on-board temperature input and PWM signal.

Application Field

The FAN8413MX is commonly employed to control the fan speed of multiple DC motors in the hard drives of computers, automobiles, and other electronic devices. It enables PWM speed control with a 2A peak over-current capability. It also features an on-board temperature sensor to detect sudden temperature rises and reduce PWM duty cycles to prevent fan failures.The FAN8413MX helps to reduce EMI and thereby improve system rigidity and performance. The robust protection features built into the device guard against temperature and current surges, making it an ideal for use in the harsh environments of hard drives.

Working Principle

The FAN8413MX utilizes a pair of integrated control transistors to drive the fan motor. The MOSFETs are connected in parallel to provide current gain and speed control. The control transistors are designed to regulate the current drawn by the fan motor, thus speeding up or slowing down the fan as required.The FAN8413MX utilizes an internal voltage regulator to provide a stable input voltage to the control transistors. The on-board temperature sensor detects sudden temperature rises and adjusts the fan speed accordingly. The PWM signal is modified to slow down the fan and reduce the power consumption.In addition, the FAN8413MX features an over-current protection function, which will shut off the power supply to the control transistors if the current drawn by the fan motor exceeds the preset limit. This safety feature prevents damage to the fan motor or other components on the board.

Conclusion

The FAN8413MX Power Management Integrated Circuit (PMIC) is an efficient and reliable motor driver, controller, and companion power multiplexer. It is commonly employed to control the fan speed of multiple DC motors in hard drives, helping to reduce EMI and improve system rigidity and performance. It offers robust protection features such as over-current protection and on-board temperature sensing to prevent fan failures.

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