Datasheet DC Brushless Fan Motor Drivers Three-Phase Full-Wave Fan Motor Driver BD6326ANUX General description Package W(Typ) x D(Typ) x H(Max) BD6326ANUX 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 180 Sinusoidal drive Power save function VSON010X3030 Internal RNF resistance 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 d 0.58 W Operating temperature T opr 25 to +95 C Storage temperature Tstg 55 to +150 C Output voltage V omax 7 V (NOTE 2) Output current I omax 700 mA 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 IN CC Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0H2H0C102310-1-2 2018 ROHM Co., Ltd. All rights reserved. 1/22 TSZ22111 14 001 31. Aug. 2018 Rev.001 BD6326ANUX 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 Start-up oscillation capacitor connection 9 TOSC 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 TSZ02201-0H2H0C102310-1-2 2018 ROHM Co., Ltd. All rights reserved. 2/22 TSZ22111 15 001 31. Aug. 2018 Rev.001