product structure silicon monolithic integrated circuit this product is not designed protection against radioactive rays 1/22 tsz02201-0h1h0b100530-1-2 ? 2013 rohm co., ltd. all rights reserved. 11. dec. 2014 rev.002 tsz22111 ? 14 ? 001 www.rohm.com dc brushless fan motor drivers three-phase full-wave fan motor driver BD6326NUX general description BD6326NUX 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 op erations and low vibrations. features ? speed controllable by pwm input signal ? 180 sinusoidal drive ? power save function ? internal rnf resistance ? motor rotation direction select function(fr) package w(typ) x d(typ) x h(max) vson010x3030 3.00mm x 3.00mm x 0.60mm application ? small fan motor notebook pcs etc. absolute maximum ratings parameter symbol limit unit supply voltage v cc 7 v power dissipation (note 1) p d 0.58 w operating temperature t opr ?25 to +95 c storage temperature t stg ?55 to +150 c output voltage v omax 7 v output current (note 2) 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 t he ic. the damage can either be a short circuit between pins or an open circuit between pins and the internal circuitry. therefore, it is import ant to consider circuit protection measures, such as adding a f use, in case the ic is operated over the absolute maximum ratings. recommended operating condition parameter symbol limit unit operating supply voltage range v cc 2.2 to 5.5 v input voltage range(pwm, fr terminals) v inx 0 to v cc v vson010x3030
2/22 datasheet d a t a s h e e t BD6326NUX tsz02201-0h1h0b100530-1-2 ? 2013 rohm co., ltd. all rights reserved. 11. dec. 2014 rev.002 www.rohm.com tsz22111 ? 15 ? 001 pin configuration pin description block diagram p/no. t/name function 1 fg fg output terminal 2 com coil midpoint terminal 3 vcc power supply terminal 4 u u phase output terminal 5 fr motor rotation direction select terminal 6 w w phase output terminal 7 v v phase output terminal 8 gnd gnd terminal 9 tosc start-up oscillation terminal 10 pwm pwm signal input terminal figure 2. block diagram figure 1. pin configuration (top view) fg com vcc u fr pwm tosc gnd v w pre- driver tsd uvlo osc vreg control duty pwm 10 v 7 w 6 vcc 3 u 4 fr 5 fg signal output 1 tosc 9 gnd 8 com 2 comp. bemf control logic comp. cs vcs tosc
3/22 datasheet d a t a s h e e t BD6326NUX tsz02201-0h1h0b100530-1-2 ? 2013 rohm co., ltd. all rights reserved. 11. dec. 2014 rev.002 www.rohm.com tsz22111 ? 15 ? 001 electrical characteristics (unless otherwise specified t a =25c, v cc =5v) parameter symbol limit unit conditions min typ max circuit current stb i cst - 20 50 a circuit current i cc 2.4 5.5 8.6 ma pwm input h level v ph 2.5 - v cc v pwm input l level v pl 0 - 0.7 v pwm input current h i ph - 0 1 a pwm=vcc pwm input current l i pl -50 -20 - a pwm=gnd input frequency f p 20 - 50 khz fr input h level v oh 2.5 - v cc v fr=h : normal rotation fr input l level v ol 0 - 0.5 v fr=l; reverse rotation tosc frequency f osf 28 40 52 khz tosc-gnd 2200pf tosc charge current i occ -137.5 -110 -82.5 a tosc=0.5v tosc discharge current i odc 75 100 125 a tosc=1.0v fg low voltage v fgl - - 0.4 v ifg 5ma |