2002. 7. 10 1/2 semiconductor technical data KIA6903P bipolar linear integrated circuit revision no : 5 dc motor speed controller for cassette tape recorder system the KIA6903P is a monolithic ic developed for speed control of general purpose dc motors. this ic consist of a reference voltage generator, current multiplier, comparator and start circuit. the ic controls the speed of a dc motor by detecting counter electromotive force from the dc motor. features wide range of working power supply voltage. (v cc =3.5 18v) very large starting torque at the low voltage. large allowable loss due to effective utilization of substrate radiation. usable for various dc motors by means of changing constants of the external components. application radio cassette tape recorders absolute maximum ratings (ta=25 ) 85 14 q dip-8 a b d p d h l w t g dim millimeters a b d t p d g h l 3.8 0.3 0 - 15 1.52 0.1 w 9.6 0.2 6.45 0.2 0.46 0.1 0.50 min 3.3 0.3 2.54 0.25+0.1/-0.05 7.62 q + _ + _ + _ + _ + _ + _ starter ref v + - KIA6903P 20:1 1 2 3 45 6 7 8 parameters symbol limits unit conditions supply voltage v cc 18 v - power dissipation p d 1.4 * w pcb:9 . t=1.0 note : derated above ta=25 in the proportion of 11.2mw/ . block diagram
2002. 7. 10 2/2 KIA6903P revision no : 5 electrical characteristics (v cc =12v, ta=25 ) characteristics symbol test circuit test condition min. typ. max. unit bias current i 4 fig.1(d) r m =180 0.5 0.8 1.2 ma output saturation voltage v sat fig.1(c) v in =4.2v, r m =4.4 - 1.5 2.0 v reference voltage v ref fig.1(a) i m =10ma 1.10 1.27 1.40 v current ratio k fig.1(b) r m1 =44 , r m2 =33 18 20 22 - reference voltage variance- power supply voltage variance v ref / v cc v ref fig.1(a) i m =100ma, v cc =6.3 18v - 0.06 - %/v current ratio variance- power supply voltage variance k / v cc k fig.1(b) i m =100ma, v cc =6.3 18v - 0.4 - %/v reference voltage variance- motor current variance v ref / i m v ref fig.1(a) i m =30 200ma - -0.02 - %/ma current ratio variance- motor current variance k / i m k fig.1(b) i m =30 200ma - -0.02 - %/ma reference voltage variance- ambient temperature variance v ref / t a v ref fig.1(a) i m =100ma, ta=-25 75 - 0.01 - %/ current ratio variance- ambient temperature variance k / t a k fig.1(b) i m =100ma, ta=-25 75 - 0.01 - %/ v v cc m r KIA6903P 58 4 1(2) 1(2) 4 8 5 KIA6903P cc v 390 ? a1 a2 i 4 ' i (sw 2 ) i (sw 1 ) 4 ' 4 ' m1 r r m2 ref v 4 ' i a2 a1 390 ? v cc 5 8 4 1(2) 1(2) 4 8 5 cc v 4.4 ? v v (sat) (a) * (b) _ _ _ k= (d) 1 , 2 , 3 , 6 , 7 pin must be connected with gnd (c) 180 ? m i 390 ? i m KIA6903P KIA6903P i m fi g .1 starter ref v m t r 75 ? r 1k ? s ev adjust r m r 4 ? cc v + - KIA6903P 20:1 1234 5 6 7 8 (r < r x 20) tm i = i k i 4 m 4 ' i (sw 2 ) i (sw 1 ) m m test circuit application circuit
|
