BD6326NUX-E2 ROHM

DC Brushless Fan Motor Drivers Three-Phase Full-Wave Fan Motor Driver BD6326NUX General description Package W(Typ) x D(Typ) x H(Max) BD6326NUX is a three-phase sensorless fan motor driver VSON010X3030 3.00mm x 3.00mm x 0.60mm 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 180 Sinusoidal drive Power save function Internal RNF resistance VSON010X3030 Motor rotation direction select function(FR) Application Small fan motor notebook PCs etc. Absolute maximum ratings Parameter Symbol Limit Unit Supply voltage V CC 7 V (NOTE 1) Power dissipation P 0.58 W d Operating temperature T opr 25 to +95 C Storage temperature T stg 55 to +150 C Output voltage V omax 7 V (NOTE 2) Output current I 700 mA omax FG signal output voltage V FG 7 V FG signal output current I FG 6 mA Junction temperature T jmax 150 C (NOTE 1) Reduce by 4.64mW/C over Ta=25C. (On 74.2mm74.2mm1.6mm glass epoxy board) (NOTE 2) This value is not to exceed Pd. Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over the absolute maximum ratings. Recommended operating condition Parameter Symbol Limit Unit Operating supply voltage range V 2.2 to 5.5 V CC Input voltage range(PWM, FR terminals) V 0 to V V INx CC Product structureSilicon monolithic integrated circuit This product is not designed protection against radioactive rays www.rohm.com TSZ02201-0H1H0B100530-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/22 TSZ2211114001 11. Dec. 2014 Rev.002DatasheetDatasheet BD6326NUX Pin Configuration Pin Description (TOP VIEW) P/No. T/name Function 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 Motor rotation direction select 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 Figure 1. Pin configuration Block Diagram TSD UVLO OSC VREG FG PWM SIGNAL DUTY 1 10 OUTPUT CONTROL BEMF CONTROL TOSC COMP. LOGIC COM TOSC 2 9 CS VCS COMP. VCC GND 3 8 PRE- DRIVER U V 4 7 FR W 5 6 Figure 2. Block diagram www.rohm.com TSZ02201-0H1H0B100530-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/22 TSZ2211115001 11. Dec. 2014 Rev.002