BD67173NUX

Datasheet DC Brushless Fan Motor Drivers Three-Phase Full-Wave Fan Motor Driver BD67173NUX General Description BD67173NUX 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. Key Specifications  Operating Supply Voltage Range: 2.2V to 5.5V  Operating Temperature Range: -25°C to +95°C Package(s) VSON010X3030 W(Typ) x D(Typ) x H(Max) 3.00mm x 3.00mm x 0.60mm Features  Speed controllable by PWM input signal  Sensorless drive  Soft switched drive Quick start  Power save function  Internal RNF resistance  Quick start function VSON010X3030 Applications  Small fan motor for notebook PCs etc. Typical Application Circuit(s) SIG ＋ 1uF~4.7uF VCC 10kohm FG CTOM VCC VCC 10kohm U FTR 1pin M ― PWM TOSC GND V Ｗ 2200pF PWM Product structure : Silicon monolithic integrated circuit .www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111 15 001 This product has no designed protection against radioactive rays 1/27 TSZ02201-0H1H0B101160-1-2 08.Sep.2015 Rev.001 BD67173NUX Contents General Description ........................................