sanyo electric co.,ltd. semiconductor company tokyo office tokyo bldg., 1-10, 1 chome, ueno, taito-ku, tokyo, 110-8534 japan ordering number : enn7714 31004tn (ot) no. 7714-1/6 overview the LB1948M is a two-channel low saturation voltage forward/reverse motor driver ic. it is optimal for motor drive in 12v system products and can drive either two dc motors, one dc motor using parallel connection, or a two-phase bipolar stepping motor with 1-2 phase excitation mode drive. applications 12v low saturation voltage forward/reverse motor drive features ? supports 12v power supply systems ? low saturation voltage: v o (sat)=0.5v (typical) at i o =400ma ? zero current drawn in standby mode ? braking function ? supports parallel connection: i o max=1.6a, v o (sat)=0.6v (typical) at i o = 800ma ? built-in spark killer diode ? thermal shutdown circuit ? miniature package: mfp-10s (6.5 5.1mm) specifications absolute maximum ratings at ta=25c sanyo semiconductors data sheet LB1948M monolithic digital ic low saturation voltage drive forward/reverse 12 v motor driver 2004.2.4 parameter symbol conditions ratings unit maximum supply voltage v cc max C0.3 to +20 v output voltage v out C0.3 to +20 v input voltage v in C0.3 to +18 v ground pin source current i gnd per channel 800 ma allowable power dissipation pd max1 independent ic 350 mw pd max2 mounted on a circuit board * 870 mw operating temperature topr C20 to +85 c storage temperature tstg C40 to +150 c any and all sanyo products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. consult with your sanyo representative nearest you before using any sanyo products described or contained herein in such applications. sanyo 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 sanyo products described or contained herein. * : on the stipulated circuit board (114.3 76.1 1.6tmm, glass epoxy)
no.7714- 2 /6 LB1948M 1 10 5 6 (0.5) 1.7max 1.0 0.35 5.0 0.15 6.4 (1.5) 0.1 4.4 0.63 v cc 1 in1 2 LB1948M t op vie w ilb01591 in2 3 in3 4 in4 5 out1 10 out2 9 out3 8 out4 7 gnd 6 parameter symbol conditions ratings unit min typ max i cc 0 in1, 2, 3, 4=0v (standby mode) 0.1 10 a current drain i cc 1 * 1 (forward or reverse mode) 15 21 ma i cc 2 * 2 (brake mode) 30 40 ma output saturation voltage v o (sat) 1 i out =200ma (high side and low side) 0.25 0.35 v v o (sat) 2 i out =400ma (high side and low side) 0.50 0.75 v input current i in v in =5v 85 110 a [spark killer diode] reverse current is (leak) 30 a forward voltage v sf i out =400ma 1.7 v electrical characteristics at ta=25 c, v cc =12v allowable operating ranges at ta=25 c package dimensions pin assignment unit : mm 3086b sanyo : mfp10s (225 mil) parameter symbol conditions ratings unit supply voltage v cc 2.5 to 16 v input high-level voltage v ih 1.8 to 10 v input low-level voltage v il C0.3 to +0.7 v * 1: in1/in2/in3/in4=h/l/l/l or l/h/l/l or l/l/h/l or l/l/l/h * 2: in1/in2/in3/in4=h/h/l/l or l/l/h/h ilb01585 0 1.0 0.8 0.87 0.6 0.4 0.35 0.2 0.18 0.45 80 60 100 0 20 20 40 pd max ta allowable power dissipation, pd max w ambient temperature, ta c independent ic mounted on a 114.3 76.1 1.6tmm glass epoxy circuit board
no.7714- 3 /6 LB1948M block diagram in1 in2 in3 in4 60k control b loc k ther mal shutdo wn circuit 80k 60k 80k 60k 80k 60k v cc 10 f out1 m m out2 out3 out4 gnd 80k input output notes in1 in2 in3 in4 out1 out2 out3 out4 l l l l off off off off standby mode l l off off 1ch standby mode h l h l forward l h l h reverse h h l l brake l l off off 2ch standby mode h l h l forward l h l h reverse h h l l brake truth table
no.7714- 4 /6 LB1948M design documentation ? voltage magnitude relationship there are no restrictions on the magnitude relationships between the voltages applied to v cc and in1 to in4. ? parallel connection the LB1948M can be used as a single-channel h-bridge power supply by connecting in1 to in3, in2 to in4, out1 to out3, and out2 to out4 as shown in the figure. (i o max=1.6a, v o (sat)=0.6v (typical) at i o =800ma) ? observe the following points when designing the printed circuit board pattern layout. make the v cc and ground lines as wide and as short as possible to lower the wiring inductance. insert bypass capacitors between v cc and ground mounted as close as possible to the ic. resistors of about 10k must be inserted between the cpu output ports and the in1 to in4 pins if the microcontroller and the LB1948M are mounted on different printed circuit boards and the ground potentials differ significantly. 1 v cc 10 m out1 2 in1 9 out2 3 in2 8 out3 4 in3 7 out4 5 in4 6 gnd
no.7714- 5 /6 LB1948M supply v oltage, v cc v i cc v cc current drain, i cc ma ilb01586 (=in1 / in2 or in3 / in4) h / h l / l h / l, l / h h / l, l / h v in =5v output current, i o ma v o (sat) i o output saturation v oltage, v o (sat) v output saturation v oltage, v o (sat) v 0 10 20 40 30 ambient temperature, t a c i cc t a current drain, i cc ma ilb01589 0 0 20 10 40 30 5 10 20 15 0 0 200 100 400 300 5 10 20 15 input v oltage, v in v i in v in input current, i in a ilb01587 v cc =12v - -40 0 0.1 0.2 0.3 0.4 0.5 0.7 0.6 0 40 80 120 - -20 20 60 100 140 ambient temperature, t a c v o (sat) - - t a ilb01590 v cc =12v high side and lo w side i o =400ma i o =300ma i o =200ma i o =100ma - -40 0 40 80 120 - -20 20 60 100 140 v cc =12v in1 to 4 ilb01588 v cc =12v high side and lo w side 0 0 0.3 0.4 0.1 0.2 0.5 0.6 200 400 100 300 600 500 (in1 / 2) h / h
ps no.7714- 6 /6 LB1948M specifications of any and all sanyo products described or contained herein stipu late the performance , characteristics, and functions of the described products in the independent stat e, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's p roducts or equipment. sanyo electric co., ltd. strives to supply high-quality high-reliability product s. however, any and al l semiconductor products fail with some probability. it is possible that these pro babilistic failures coul d give rise to accidents or events that could endanger human lives, that could giv e rise to smoke or fire, or that could cause damage to other property. when designing equipment, adopt sa fety measures s o t hat these kinds of accidents or events cannot occur. such measures include but a re not limited to protectiv e circuits and error prevention circuits for safe design, redundant design, and st ructural design. in the event that any or all sanyo products(including technical data,services) d escribed o r contained herein are controlled under any of applicable local export control law s and regulations, such products m ust not be e xpor ted without obtaining the e xpor t license from the author ities concerned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by a ny means, electronic o r mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of sanyo electric co. , ltd. any and all information described or contained herein are subject to change with out notice due to product/technology improvement, etc. when designing equipment, refer to the "del ivery specification " for the sanyo product that you intend to use. information (including circuit diagrams and circuit parameters) herein is for ex ample 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 inte llectual property rights or other rights of third parties. this catalog provides information as of march, 2004. specifications and information herein are subject to change without notice.
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