BH67172NUX-GE2 ROHM

Datasheet DC Brushless Fan Motor Drivers Three-Phase Full-Wave Fan Motor Driver BH67172NUX General description Package W (Typ.) x D (Typ.) x H (Max.) BH67172UX is a three-phase sensorless fan motor VSON010X3030 3.00mm x 3.00mm x 0.60mm 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 doesnt 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 VSON010X3030 Soft switched drive Quick start Power save function Internal RNF resistance Quick start function Application Small fan motor notebook PCs etc. Absolute maximum ratings Parameter Symbol Limit Unit Supply voltage VCC 0.36.5 V *1 Power dissipation Pd 464 mW Operating temperature Topr 25 to +95 C Storage temperature Tstg 55 to +125 C *2 Output current Iomax 700 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=25C. (On 74.2mm74.2mm1.6mm glass epoxy board) *2 This value is not to exceed Pd. Recommended operating conditions Parameter Symbol Limit Unit Operating supply voltage range VCC 1.8 to 5.5 V Product structureSilicon monolithic integrated circuit This product is not designed protection against radioactive rays . www.rohm.co TSZ02201-0H1H0B100300-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/16 TSZ22111 14001 31.JUL.2012 Rev.002DatasheetDatasheet BH67172NUX Pin configuration Pin description (TOP VIEW) P/No. T/name 1 FG FG output terminal 2 COM Coil midpoint terminal FG PWM 3 VCC Power supply terminal COM TOSC 4 U U phase output terminal 5 FR Forward/Reverse switch terminal VCC GND 6 W W phase output terminal U V 7 V V phase output terminal 8 GND GND terminal FR W 9 TOSC Start-up oscillation terminal 10 PWM PWM signal input terminal Fig.1 Pin configuration Block diagram TSD Det Level UVLO FG COM BEMF Det OSC VCC PWM U Logic FR V TOSC Pre W GND Fig.2 Block diagram www.rohm.co TSZ02201-0H1H0B100300-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/16 TSZ22111 15001 31.JUL.2012 Rev.002