preliminary NJM2641 -1- two-phase unipolar dc brushless motor pre-driver ic general description the NJM2641 is a 2-phase dc brushless motor pre-driver ic. it incorporates lock detect and auto protection circuit. the turn on / turn off ratio at auto protection release was set in 1:10 easy-to-use. moreover, the pin is compatible with 48v pre-driver njm2640. package outline NJM2641m NJM2641e NJM2641rb1 features ? operating voltage v dd =4 to 14v ? absolute maximum voltage 15v ? internal lock detect / auto protection release circuit ? lock alarm output terminal ? package outline dmp8 / emp8 / tvsp8 block diaglam pin function 1: vcc 2: h1 3: la 4: h2 5: gnd 6: ct 7: out1 8: out2 5 6 7 8 4 3 2 1
preliminary NJM2641 - 2 - absolute maximum ratings (ta=25 c) parameter symbol ratings unit note supply voltage v cc 15 v - hall input voltage range v ih -0.3 v cc v - output current (peak) i o ut 70 ma - lock alarm output voltage v ola 15 v - hall input differential voltage v ihd 2 v - lock alarm output current i ola 20 ma - operating temperature range topr -40 85 c - operating junction temperature range toj -40 150 c - storage temperature range tstg -55 150 c - power dissipation p d 300(dmp8) / 375(emp8) / 400(tvsp8) mw device itself recommended operating conditions (ta=25 c) parameter symbol ratings unit (unit) note supply voltage v cc 4 14 v - hall input voltage common mode voltage v icm 1.5 vcc-2 v - junction temperature tj -40 125 c -
preliminary NJM2641 - 3 - electrical characteristics (v dd =12v, ta=25c) parameter symbol condition min. typ. max. unit v cc =12v - 3.0 4.0 operating current i cc v cc =5v - 2.8 3.75 ma hall input hysterisis range v hys - 8 20 32 mv hall amplifier input bias current i b - - 1.0 - a output voltage v out i out =20ma - v cc -1.5 - v output leak current i leak v cc =14v - 1 10 a lock alarm output voltage v la lock alarm on,i la =5ma - - 0.5 v lock alarm leak current i la-leak v la =14v - 1 5 a ct charge current i chg v ct =1.5v - 4.0 - a ct discharge current i dchg v ct =1.5v - 0.4 - a charge / discharge current ratio i chg / i dchg - - 10 - ct h-level cense voltage v cth - 2.5 2.8 3.1 v ct l-level cense voltage v ctl - 0.6 0.7 0.8 v auto protection release on time t on ct=0.47f - 0.25 - s auto protection release on time t off ct=0.47f - 2.5 - s the specifications on this data book are only given fo r information, without any guarantee as regards either mistakes o r omissions. the application circuit in this data book are describe d only to show representative usages of the product and no t intended for the guarantee or permission of any right includin g the industrial rights.
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