Diodes Incorporated
SO 8

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AM4406F (Not Recommended for new design)

NRND = Not Recommended for New Design

Two Phase BLDC Fan and Motor Driver with Complementary Open Darlington Emitter Output

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The AM4406/4406F are 2-phase, half-wave motor predrivers fabricated for fan motors. These ICs are equipped with lock shutdown and automatic restart functions. The lock shutdown function turns off the output current when the motor is under lock condition. And when the motor is unlocked, the ICs will automatically restart and allow DC fan to run. In addition, the AM4406 and AM4406F have RD and FG functions respectively. The RD function is to detect the motor status and FG function enables frequency generation.


· Hall Inputs with a Hysteresis · Lock Shutdown and Automatic Restart · Rotation Detection (RD) Output · Frequency Generation (FG) Output · Supply Voltage: 4 to 28V · Output Current: 70mA Max. · Operating Temperature: -40°C to 95°C


· High Voltage, High Current Brushless DC Fan · Power Supply and Switchboards · Communications Facilities · Industrial Equipment

Product Specifications

Product Parameters

Frequency Generator (FG) and Rotation Detect FG
Lock Detect, Shut-Down and Auto Start -
Low Side Switch Drive Sink Current -
Low Side Switch Drive Source Current (mA) 70
Minimum Speed Setting -
Operating Ambient Temperature (°C) -40 to 85
Operating Voltage (V) 4 to 28
Reference Voltage Output (V) -
Speed Control VSPD or VDD
SupplyCurrent (mA) 3.2

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Technical Documents

Recommended Soldering Techniques


Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2654 2024-02-15 2024-04-28 Device End of Life (EOL)