DC Brushless Motor Drivers for Cooling Fans
Fan Motor Driver for Note PC
BH6717NUV is a three-phase sensorless fan motor driver used to cool off notebook PCs. It is controlled by a variable
speed provided through the PWM input signal. Its feature is sensorless drive which doesn’t require a hall device as a
location detection sensor and motor downsizing can be achieved by limiting the number of external components as much
as possible. Furthermore, introducing a direct PWM soft switched driving mechanism achieves silent operations and low
1) Speed controllable by PWM input signal
2) Sensorless drive
3) Soft switched drive
4) Power save function
small fan motor notebook PCs etc
●Absolute maximum ratings(Ta=25C)
Pd 560 *
Operating temperature Topr -25～+95
FG signal output voltage
FG signal output current
* Reduce by 5.6mW/C over 25/C. (On 70mm×70mm×1.6mm glass epoxy board)
** This value is not to exceed Pd.
Operating supply voltage range
*These specifications might change for their improvement etc.
1.8 ～ 5.5
© 2012 ROHM Co., Ltd. All rights reserved.
2012.03 - Rev.A