unisonic technologies co., ltd an8850 preliminary cmos ic www.unisonic.com.tw 1 of 5 copyright ? 2011 unisonic technologies co., ltd qw-r502-507.a motor control circuits ? description the utc an8850 is a electronic governor suitable for low-voltage and compact dc motors generally used in the tape recorder, etc. ? features * wide range of operating voltage : v cc(opr) =1.8v ~ 12v * 2 package types * fewer external parts * speed control in steps with linear fine control dip-8 ? ordering information ordering number lead free halogen free package packing an8850l-d08-t AN8850G-D08-T dip-8 tube note: xx: output voltage, refer to marki ng information. an8850l-d08-t (1)packing type (2)package type (1) t: tube (2) d08: dip-8 (3) halogen free, l: lead free (3)lead free
an8850 preliminary cmos ic unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r502-507.a ? pin configuration 1 2 3 4 v ref - v ref + v cc comparator input 8 7 6 5 phase compensation motor pin gnd gnd ? pin description pin no. pin name description 1 v ref - v ref - 2 v ref + v ref + 3 v cc power supply 4 comparator input input of comparator 5 gnd ground 6 gnd ground 7 motor pin output pin 8 phase compensation phase compensation ? block diagram
an8850 preliminary cmos ic unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r502-507.a ? absolute maximum rating (ta= 25c) parameter symbol ratings unit supply voltage v cc 12 v circuit voltage v n ? 5, 6 (n = 1, 2, 3, 4) -0.5~7.5 v circuit voltage v n ? 5, 6 -0.5~1 v supply current i cc (note 1) 2 a circuit current i out 2 a power dissipation p d 750 mw operating ambient temperature t opr -20~+75 c storage temperature t stg -40~+150 c notes: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. 1. t 5s ? electrical characteristics (ta= 25c) parameter symbol test conditions min typ max unit supply current i cc v cc =3v 2 3 ma reference voltage v ref v cc =3v, v 2-1 >10k ? 1.20 1.28 1.35 v starting voltage v cc(s) supply voltage in which 30ma curren t flows to ra 1.0 1.2 v saturation voltage v sat v cc =1.8v ra=4.7 ? 0.2 0.5 v voltage characteristics 1 cc ref ref v / v v v cc = 1.8v ~ 12v -1.25 0.1 1.25 %v voltage characteristics 2 cc a a v / v v v cc = 1.8v ~ 12v -1.2 0.1 1.2 %v current characteristics out i / ref ref v v i out =1~20ma -0.2 0.01 0.2 %ma current characteristics ta / v v ref ref ta=-20~+60c v cc =3.0v 0.01 %c note: operating supply voltage range : v cc (opr) = 1.8v ~ 12v
an8850 preliminary cmos ic unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r502-507.a ? typical application circuit 8 7 6 5 1 2 3 4 utc an8850 m + - 1f 10v 0.4 (3900ppm/c) v cc 3 510 vr 1kb 9.1k (2000ppm/c) 1000pf 0.1f motor ra=4 motor constants r a : internal resistor = 4 k a : electromotive force constant = 0.4mv/rpm k t : torque constant = 30g cm/a speed control circuit with 3v core motor
an8850 preliminary cmos ic unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r502-507.a utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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