specifications of any and all sanyo semiconductor co.,l td. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, 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 ' sproductsor equipment. any and all sanyo semiconductor co.,ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, av equipment, communication device, office equipment, industrial equ ipment etc.). the products mentioned herein shall not be intended for use for any "special application" (medica l equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, t ransportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of re liability and can directly threaten human lives in case of failure or malfunction of the product or may cause har m to human bodies, nor shall they grant any guarantee thereof. if you should intend to use our products for app lications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. if there is n o consultation or inquiry before the intended use, our customer shall be solely responsible for the use. d2408 ms / 31004tn (ot) no.7714-1/6 LB1948M overview the LB1948M is a 2-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 2-phase bipolar stepping motor with 1-2 phase excitation mode 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 ? built-in thermal shutdown circuit ? miniature package: mfp-10s (6.4mm 5.0mm) specifications absolute maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max -0.3 to +20 v output voltage v out -0.3 to +20 v input voltage v in -0.3 to +18 v ground pin source current i gnd per channel 800 ma pd max1 independent ic 350 mw allowable power dissipation pd max2 mounted on a specified board* 870 mw operating temperature topr -20 to +85 c storage temperature tstg -40 to +150 c * specified board: 114.3mm 76.1mm 1.6mm, glass epoxy board. monolithic digital ic 12v low saturation voltage drive forward/reverse motor driver orderin g numbe r : en7714a http://semicon.sanyo.com/en/network
LB1948M no.7714-2/6 allowable operating range at ta = 25 q c 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 -0.3 to +0.7 v electrical characteristics at ta 25 q c, v cc = 5v ratings parameter symbol conditions min typ max unit i cc 0 in1, 2, 3, 4 = 0v (standby mode) 0.1 10 p a i cc 1 *1 (forward or reverse mode) 15 21 ma current drain i cc 2 *2 (brake mode) 30 40 ma v o (sat)1 i out = 200ma (high side and low side) 0.25 0.35 v output saturation voltage 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 p a spark killer diode reverse current i s (leak) 30 p a forward voltage v sf i out = 400ma 1.7 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. package dimensions unit : mm (typ) 3086b pin assignment 1 v cc 2 in1 3 in2 4 in3 5 in4 10 9 8 7 6 out1 out2 out3 out4 gnd LB1948M top view sanyo : mfp10s(225mil) 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 -20 0 20 40 60 80 100 0 1.0 0.8 0.6 0.4 0.2 85 pd max -- ta 0.87 0.35 0.45 0.18 ambient temperature, ta -- c allowable power dissipation, pd max -- w specified board: 114.3 76.1 1.6mm 3 glass epoxy board. independent ic
LB1948M no.7714-3/6 truth table input output in1 in2 in3 in4 out1 out2 out3 out4 notes l l l l off off off off standby mode l l off off standby mode h l h l forward l h l h reverse h h l l 1ch brake l l off off standby mode h l h l forward l h l h reverse h h l l 2ch brake block diagram v cc in1 in2 in3 in4 out1 out2 out3 out4 gnd m m 60k ? 80k ? 60k ? 80k ? 60k ? 80k ? 60k ? 80k ? 10 f control block thermal shutdown circuit
LB1948M no.7714-4/6 design documentation (1) voltage magnitude relationship there are no restrictions on the magnitude relationships between the voltages applied to v cc and in1 to in4. (2) 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) 1v cc 2 in1 3 in2 4 in3 5 in4 10 9 8 7 6 out1 out2 out3 out4 gnd LB1948M m (3) observe the following points when designing the printed circuit board pattern layout. x make the v cc and ground lines as wide and as short as possible to lower the wiring inductance. x insert bypass capacitors between v cc and ground mounted as close as possible to the ic. x 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. thermal shutdown temperature (1) thermal shutdown temperature the thermal shutdown te mperature ttsd is 200 r 20 q c with fluctuations. (2) thermal shutdown operation the operation of the thermal shutdown circuit is shown in the figure below. when the chip temperature tj is in the direction of incr easing (solid line), the output turns off at approximately 200 q c. when the chip temperature tj is in the direction of decreasing (dotted line), the output turns on (returns) at approximately 125 q c. 100 120 140 160 180 200 220 0 14 12 10 8 6 4 2 v cc = 12v 100 c 220 c 220 c 100 c return tsd operation chip temperature, tj -- c output voltage, v o -- v LB1948M thermal shutdown reference chart
LB1948M no.7714-5/6 thermal shutdown circuit block diagram vref reference voltage circuit thermal shutdown circuit drive circuit function equivalent circuit note: the above is an example of therma l shutdown circuits although there are some differences from the actual internal circuit. thermal shutdown operation the thermal shutdown circuit compares the voltage of the he at sensitive element (diode) with the reference voltage and shuts off the drive circuit at a certain temperature to protect the ic chip from overheating. i cc -- v cc i in -- v in v o (sat) -- i o i cc -- ta 40 0 10 20 30 0 5 10 15 20 0 5 10 15 20 400 0 100 200 300 0.6 0 0.1 0.3 0.5 0.2 0.4 0 100 200 300 400 500 600 40 0 10 20 30 -40 -20 0 20 40 60 80 100 120 140 v in = 5v (= in1 / in2 or in3 / in4) h / h h / l, l /h l / l v cc = 12v in1~4 v cc = 12v v cc = 12v (in1 / 2) h /h h / l, l /h current drain, i cc -- ma supply voltage, v cc -- v input current, i in -- a input voltage, v in -- v output saturation voltage, v o (sat) -- v current drain, i cc -- ma output current, i o -- ma ambient temperature, ta -- c high side and low side
LB1948M ps no.7714-6/6 sanyo semiconductor co.,ltd. assumes no responsib ility for equipment failures that result from using products at values that exceed, even momentarily, rate d values (such as maximum ra tings, operating condition ranges, or other parameters) listed in products specif ications of any and all sanyo semiconductor co.,ltd. products described or contained herein. sanyo semiconductor co.,ltd. strives to supply high-qual ity high-reliability products, however, any and all semiconductor products fail or malfunction with some probabi lity. it is possible that these probabilistic failures or malfunction could give rise to acci dents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause dam age to other property. when designing equipment, adopt safety measures so that these kinds of accidents or e vents cannot occur. such measures include but are not limited to protective circuits and error prevention c ircuits for safe design, redundant design, and structural design. upon using the technical information or products descri bed herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of sanyo semiconductor co.,ltd. or any third party. sanyo semiconductor co.,ltd. shall not be liable f or any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. information (including circuit diagr ams and circuit parameters) herein is for example only; it is not guaranteed for volume production. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equi pment, refer to the "delivery specification" for the sanyo semiconductor co.,ltd. product that you intend to use. in the event that any or all sanyo semiconductor c o.,ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities conc erned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any in formation storage or retrieval system, or otherwise, without the prior written consent of sanyo semiconductor co.,ltd. 0 0.1 0.2 0.3 0.4 0.5 0.7 0.6 0 40 80 120 20 60 100 140 v cc = 12v high side and low side i o = 400ma 300ma 200ma 100ma v o (sat) -- ta -20 -40 output saturation voltage, v o (sat) -- v ambient temperature, ta -- c this catalog provides information as of december, 2008. specifications and inform ation herein are subject to change without notice.
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