BH67172NUX Datasheet, PDF (1/20 Pages) Rohm – Three-Phase Full-Wave Fan Motor Driver

Datasheet
DC Brushless Fan Motor Drivers
Three-Phase Full-Wave
Fan Motor Driver
BH67172NUX
●General description
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
vibrations.
●Features
„ Speed controllable by PWM input signal
„ Sensorless drive
„ Soft switched drive Quick start
„ Power save function
„ Internal RNF resistance
„ Quick start function
●Application
„ Small fan motor notebook PCs etc.
●Package
VSON010X3030
W (Typ.) x D (Typ.) x H (Max.)
3.00mm x 3.00mm x 0.60mm
VSON010X3030
●Absolute maximum ratings
Parameter
Symbol
Limit
Unit
Supply voltage
Power dissipation
VCC
Pd
−0.3～6.5
V
464 ^*1
mW
Operating temperature
Topr
–25 to +95
°C
Storage temperature
Output current
Tstg
Iomax
–55 to +125
°C
700^*2
mA
FG signal output voltage
VFG
6.5
V
FG signal output current
IFG
6
mA
Junction temperature
Tjmax
125
°C
*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
Parameter
Operating supply voltage range
Symbol
VCC
Limit
Unit
1.8 to 5.5
V
○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays
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TSZ22111・14・001
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TSZ02201-0H1H0B100300-1-2
31.JUL.2012 Rev.002