This part is a kind of semiconductor called BD6994FV.

Function of this product has Multifunction Single-phase Full-wave Fan Motor Driver.

Manufacturers : ROHM

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Datasheet DC Brushless Fan Motor Drivers Multifunction Single-phase Full-wave Fan Motor Driver BD6994FV General Description BD6994FV is a 1chip driver for 12V single-phase full-wave fan motor. This IC employs the Bi-CMOS process and incorporates various functions such as low ON resistance, low power consumption and quiet drive. Features  SSOP Small Package  BTL Soft Switching Drive  Stand-by Function  Speed Controllable by DC / Pulse Input  Quick Start  Duty Control Start-up Function  Lock Protection and Automatic Restart (without External Capacitor)  Rotation Speed Pulse Signal (FG) Output  Lock Alarm Signal(AL) Output Key Specifications  Operating Voltage Range:  Operating Temperature Range:  Output Voltage (Total): 4.5V to 17V -40°C to +105°C 0 [ ... ]

BD6994FV PDF Datasheet Download