monolithic digital ic ordering number : en3976a 33098ha (ot)/d111ts no. 3976-1/6 sanyo electric co.,ltd. semiconductor bussiness headquarters tokyo office tokyo bldg., 1-10, 1 chome, ueno, taito-ku, tokyo, 110-8534 japan three-phase brushless motor driver ic LB1857M overview the LB1857M is a three-phase brushless motor driver ic designed for use as a camcorder capstan or drum motor driver, or as a digital audio tape player/recorder motor driver. features 120 voltage linear system appropriate for portable applications, since the LB1857M reduces system power requirements by using motor voltage control for speed control. built-in torque ripple compensation circuit small external capacitances due to the adoption of a soft switching technique (chip capacitor). built-in thermal shutdown circuit built-in fg amplifier package dimensions unit: mm 3073a-mfp30s sanyo: mfp30s [LB1857M] specifications absolute maximum ratings at ta = 25? parameter symbol conditions ratings unit v cc 1 max 7 v supply voltage v cc 2 max 16 v v s max v cc 2v output applied voltage v o max v s + 2 v output current i o max 1.5 a allowable power dissipation pd max 1.0 w operating temperature topr ?0 to +75 ? storage temperature tstg ?5 to +125 ? allowable operating ranges at ta = 25? parameter symbol conditions ratings unit v cc 1v cc 1 v cc 2 4.0 to 6.0 v supply voltage v cc 2 4 to 14 v v s up to v cc 2v
no. 3976- 2 /6 LB1857M electrical characteristics at ta = 25 c, v cc 1 = 5 v, v cc 2 = 7 v, v s = 3 v ratings parameter symbol conditions min typ max unit i cc 1 v br = 5 v 4.5 6.5 ma supply current i cc 2 v br = 5 v 13 20 ma i s v br = 5 v, r l = 6.5 9.0 ma output quiescent current i ccoq v stby = 0 v 180 a i soq v stby = 0 v, r l = 150 a output saturation voltage v o(sat) i out = 0.6 a, sink + source 2.3 v output trs withstand voltage v o(sus) i out = 20 ma * 1 16 v output quiescent voltage v oq v br = 5 v 1.4 1.5 1.6 v hall amplifier input offset voltage v hoffset * 1 ? +5 mv hall amplifier common mode input v hcom 1.4 2.8 v voltage range hall i/o voltage gain gv ho rangle = 8.2 k 32.0 35.0 38.0 db brake pin high level voltage v brh 2.0 v brake pin low level voltage v brl 0.8 v brake pin input current i brin 100 a brake pin leakage current i brleak ?0 a frc pin high level voltage v frch 2.8 v frc pin low level voltage v frcl 1.2 v frc pin input current i frcin 100 a frc pin leakage current i frcleak ?0 a upper side residual voltage v xh i out = 100 ma, v cc 2 = 6 v, v s = 2 v 0.32 0.49 v lower side residual voltage v xl i out = 100 ma, v cc 2 = 6 v, v s = 2 v 0.39 0.48 v overlap level ol v cc 2 = 6 v, v s = 3 v 60 70 80 % standby on voltage v stbyl * 2 ?.2 +0.1 v standby off voltage v stbyh 2 5 v standby pin bias current i stbyin 10 a thermal protection circuit operating t tsd * 1 150 180 210 c temperature thermal protection circuit hysteresis d t tsd * 1 15 c [fg amplifier] input offset voltage v fg offset ? +8 mv open loop voltage gain gv fg f = 1 khz 60 db source output saturation voltage v fg ou i o = ? ma 3.7 v sink output saturation voltage v fg od i o = 2 ma 1.3 v common mode signal exclusion ratio chr * 1 80 db fg amplifier common mode input v fg ch 0 3.5 v voltage range phase margin f m * 1 20 deg schmitt amplifier threshold voltage v fgs sh v fgin + = 2.5 v, 2.45 2.50 2.55 v when v fgout 2 goes from high to low schmitt amplifier hysteresis width v fgs his v fgin + = 2.5 v 20 40 60 mv note: 1. these are target settings, and are not measured. the overlap ratings are taken as test ratings without change. 2. when the standby pin is open the ic will be in the standby state.
no. 3976- 3 /6 LB1857M pin assignment bloc k dia gram top view allowable power dissipation, pd max ?w
no. 3976- 4 /6 LB1857M pin functions pin no. symbol pin voltage equivalent circuit pin function 4 v s v cc 2 power supply input that determines the output amplitude. it must be set to a voltage equal or lower than v cc 2. 5 v cc 2 4 to 14 v power supply for power amplifier systems other than motor drive transistors. power supply pin that provides voltage for blocks other than control blocks supplied by v cc 1. 6 v cc 1 4 to 6 v power supply that provides voltage for the hall amplifier, the forward/reverse circuit, the fg amplifier, and the thermal shutdown circuit. 8 angle connect a resistor between this pin and gnd. changing the value of this resistor will change the hall input-output gain (motor waveform slope). 10 fg in 0 v min fg signal input pin 11 fg in + 3.5 v max (when v cc 1 is 5 v) 12 fg out 1 fg amplifier output pin 7 st. by (h): 0.1 v max all circuits can be made inoperative either by (l): 2.0 v min connecting this pin to gnd, or by leaving it open. (when v cc 1 is 5 v) in that state the supply current will be approximately 100 a. hold at 2 v or higher during normal operation. continued on next page unit (resistance: )
continued from preceding page. pin no. symbol pin voltage equivalent circuit pin function no. 3976- 5 /6 LB1857M 19 br (h): 2.0 v min motor brake pin (l): 0.8 v max low level: motor drive (under 0.8 v) high level: motor brake (over 2.0 v) 20 w in 2 1.4 v min w phase hall element input pins. 21 w in 1 2.8 v max logic high is defined to be states where 22 v in 2 (when v cc 1 is 5 v) w in 1 > w in 2. 23 v in 1 v phase hall element input pins. 24 u in 2 logic high is defined to be states where 25 u in 1 v in 1 > v in 2. u phase hall element input pins. logic high is defined to be states where u in 1 > u in 2. 13 fg out 2 fg schmitt amplifier output pin 27 u out output pin 28 v out 3 w out 26 r f output transistor gnd 1, 2, frame gnd for all circuits other than output transistors. 14, 15, (gnd) 16, 17, 29, 30 18 frc (h): 2.8 v min pin for setting the motor to forward or reverse (l): 1.2 v max rotation (when v cc 1 is 5 v) low level: forward rotation (under 1.2 v: when v cc 1 is 5 v) high level: reverse rotation (over 2.8 v: when v cc 1 is 5 v) unit (resistance: )
sample application cir cuit logic v alue t ab le inputs: high: for each phase, the input 1 potential is at least 0.2 v higher than the input 2 potential. low: for each phase, the input 1 potential is at least 0.2 v lower than the input 2 potential. forward/reverse control: high: 2.8 v to v cc 1 low: 0 to 1.2 v ps no. 3976- 6 /6 LB1857M this catalog provides information as of march, 1998. specifications and information herein are subject to change without notice. n no products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. n anyone purchasing any products described or contained herein for an above-mentioned use shall: accept full responsibility and indemnify and defend sanyo electric co., ltd., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on sanyo electric co., ltd., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. n information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. sanyo believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. source input forward and reverse control sink u v w f/rc 1 w phase ? v phase h h l l v phase ? w phase h 2 w phase ? u phase h l l l u phase ? w phase h 3 v phase ? w phase l l h l w phase ? v phase h 4 u phase ? v phase l h l l v phase ? u phase h 5 v phase ? u phase h l h l u phase ? v phase h 6 u phase ? w phase l h h l w phase ? u phase h units (resistance: , capacitance: f)
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