DC Brushless Fan Motor Drivers
Fan Motor Driver
BH67172UX 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
Speed controllable by PWM input signal
Soft switched drive Quick start
Power save function
Internal RNF resistance
Quick start function
Small fan motor notebook PCs etc.
W (Typ.) x D (Typ.) x H (Max.)
3.00mm x 3.00mm x 0.60mm
●Absolute maximum ratings
Topr –25 to +95
–55 to +125
FG signal output voltage
FG signal output current
*1 Reduce by 4.64mW/°C over Ta=25°C. (On 74.2mm×74.2mm×1.6mm glass epoxy board)
*2 This value is not to exceed Pd.
●Recommended operating conditions
Operating supply voltage range
1.8 to 5.5
○Product structure：Silicon monolithic integrated circuit
© 2012 ROHM Co., Ltd. All rights reserved.
○This product is not designed protection against radioactive rays