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. 41107 ti pc b8-6489, 6394 no.7633-1/9 lb1945d overview the lb1945d is a pwm current control stepping motor driver that uses a bipolar drive technique. it is optimal for use with the carriage and paper feed steppi ng motors used in printers. functions and features ? pwm current control (external clock) ? digital load current selection function (supports 1-2, w1-2, and 2-phase excitation) ? built-in high and low side diodes ? simultaneous on state prevention function (through-current prevention) ? built-in thermal shutdown circuit ? noise canceling function specifications absolute maximum ratings at ta = 25 c parameter symbol conditions ratings unit motor supply voltage v bb max 30 v output peak current i o peak tw 20 s 1.0 a output continuous current i o max 0.8 a logic system supply voltage v cc max 6.0 v logic input voltage range v in -0.3 to v cc v emitter output voltage range ve 1.0 v allowable power dissipation pd max independent ic 2.8 w operating temperature topr -20 to +90 c storage temperature tstg -55 to +150 c monolithic digital ic pwm current control stepping motor driver orderin g numbe r : en7633a
lb1945d no.7633-2/9 recommended operating range at ta = 25 c parameter symbol conditions ratings unit motor supply voltage v bb 10 to 28 v logic system supply voltage v cc 4.75 to 5.25 v reference voltage vref 1.5 to 5.0 v electrical characteristics at ta = 25 c, v bb = 24v, v cc = 5v, vref = 5v ratings parameter symbol conditions min typ max unit output block output stage supply current i bb on i bb off i 1 = 0.8v, i 2 = 0.8v, enable = 0.8v enable = 3.2v 0.5 1.0 2.0 0.2 ma output saturation voltage 1 v o sat1 i o = +0.5a, sink side 0.3 0.5 v output saturation voltage 2 v o sat2 i o = +0.8a, sink side 0.5 0.7 v output saturation voltage 3 v o sat3 i o = -0.5a, source side 1.6 1.8 v output saturation voltage 4 v o sat4 i o = -0.8a, source side 1.8 2.0 v output leakage current v o 1(leak) v o 2(leak) v o = v bb , sink side v o = 0v, source side -50 50 a output sustain voltage vsus l = 3.9mh, i o = 1.0a* 30 v logic block logic supply current i cc on i cc off i 1 = 0.8v, i 2 = 0.8v, enable = 0.8v enable = 3.2v 50 7 70.0 10.0 92 13 ma input voltage v ih v il 3.2 1.8 v input current i ih i il v ih = 3.2v v il = 0.8v 35 7 50 10 65 13 a set current control threshold value vref/ vsen i 1 = 0.8v, i 2 = 0.8v i 1 = 3.2v, i 2 = 0.8v i 1 = 0.8v, i 2 = 3.2v 9.5 13.5 25.5 10 15 30 10.5 16.5 34.5 reference current iref vref = 5.0v, i 1 = 0.8v, i 2 = 0.8v 17.5 25 32.5 a cr pin current icr cr = 1.0v -1.0 a thermal shutdown temperature ts 170 c thermal shutdown hysteresis tshy 40 c *: the design specification items are design guarantees and are not measured. package dimensions unit:mm (typ) 3147c sanyo : dip28h(500mil) 1 14 28 15 0.4 0.6 4.0 4.0 26.75 20.0 r1.7 8.4 (1.81) 1.78 1.0 12.7 11.2 0 2.5 3.0 2.8 1.5 0.5 1.0 2.0 3.5 -20 10 0 80 60 20 40 0 1.34 ambient temperature, ta ? c allowable power dissipation, pd max ? w pd max ? ta independent ic
lb1945d no.7633-3/9 pin assignment pin functions pin no. pin description 22 v bb 1 output stage power supply voltage 5 v bb 2 high side diode cathode connection 24 6 e1 e2 the set current is controlled by inserting resistors re between these pins and ground. 27 28 2 1 outa outa outb outb output pins 15 gnd ground 14 s-gnd sense ground 4, 25 subgnd ic sub-ground 23 7 d-gnd low side built-in diode ground (anode side) 8 cr chopping is performed at the period of a triangle wa ve set by the rc circuit connected to this pin. the triangle wave off time is the noise cancellation time. 16 13 vref1 vref2 output current settings. (the output current is determined by prov iding an input in the range 1.5v to 5v.) 20 9 phase1 phase2 output phase switching inputs high-level input: outa = high, outa = low low-level input: outa = low, outa = high 19 10 enable1 enable2 output on/off control inputs high-level input: output off low-level input: output on 17, 18 12, 11 ia1, ia2 ib1, ib2 output current setting digital inputs. the output current is set to 1/3, 2/3 or 1 by input high/low levels to these pins. 21 v cc logic block power supply voltage 28 lb1945d top view 27 26 25 24 23 22 21 20 19 18 17 16 15 outb 1 2 3 4 5 6 7 8 9 10 11 12 13 14 outb nc subgnd v bb e2 d-gnd cr phase2 enable2 ib2 ib1 vref2 s-gnd subgnd e1 d-gnd v bb v cc phase1 enable1 ia2 ia1 vref1 gnd outa outa nc ilb01555
lb1945d no.7633-4/9 block diagram enable1 control logic circuit phase1 enable2 ia2 ia1 control logic circuit v bb 1 outa outb outa s-gnd phase2 ib1 ib2 gnd e2 thermal shutdown circuit vref1 e1 vref2 cr outb d-gnd d-gnd v cc current selection circuit current selection circuit blanking time osc blanking time subgnd subgnd v bb 2 ilb01559
lb1945d no.7633-5/9 application circuit outa lb1945d outa nc subgnd e1 d-gnd v bb v cc phase1 enable1 ia2 ia1 vref1 gnd outb outb nc subgnd e2 d-gnd cr phase2 enable2 v bb ib2 ib1 vref2 s-gnd 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 0.5 820pf 0.5 24v 47 f 5v 10 f 5v 10 f ilb01556 motor l motor l logic input logic input 56k
lb1945d no.7633-6/9 truth table enable phase outa outa low high high low low low low high high - off off i 1 i 2 output current low low vref/(10 r e ) = i out high low vref/(15 r e ) = i out 2/3 low high vref/(30 r e ) = i out 1/3 high high 0 note: the output is turned off when enable is high or in the i 1 = i 2 = high state. clockwise/counterclockw ise operating sequence 2-phase excitation drive clockwise rotation ia1 = ia2 = ib1 = ib2 = 0 no. phase1 outa outa phase2 outb outb 0 0 0 1 0 0 1 1 1 1 0 0 0 1 2 1 1 0 1 1 0 3 0 0 1 1 1 0 counterclockwise rotation ia1 = ia2 = ib1 = ib2 = 0 no. phase1 outa outa phase2 outb outb 0 0 0 1 1 1 0 1 1 1 0 1 1 0 2 1 1 0 0 0 1 3 0 0 1 0 0 1 control sequence 2-phase excitation table 1 enable1 = enable2 = 0 phase a phase b no ph1 ia2 ia1 current value ph2 ib2 ib1 current value 0 0 0 0 1 0 0 0 1 1 1 0 0 1 0 0 0 1 2 1 0 0 1 1 0 0 1 3 0 0 0 1 1 0 0 1 1-2 phase excitation - 1/2 step table 2 enable1 = enable2 = 0 phase a phase b no. ph1 ia2 ia1 current value ph2 ib2 ib1 current value 0 0 0 0 1 * 1 1 0 1 0 0 1 2/3 0 0 1 2/3 2 * 1 1 0 0 0 0 1 3 1 0 1 2/3 0 0 1 2/3 4 1 0 0 1 * 1 1 0 5 1 0 1 2/3 1 0 1 2/3 6 * 1 1 0 1 0 0 1 7 0 0 1 2/3 1 0 1 2/3
lb1945d no.7633-7/9 1-2 phase excitation timing chart ph1 ia2 ia1 ph2 ib2 ib1 i out 1 v out 1 i out 2 0 1 2 3 4 5 6 7 v out 2 1 cycle = t ilb01558
lb1945d no.7633-8/9 w1-2 phase excitation - about 1/4 step table 3 enable1 = enable2 = 0 phase a phase b no ph1 ia2 ia1 current value ph2 ib2 ib1 current value 0 0 0 0 1 * 1 1 0 1 0 0 0 1 0 1 0 1/3 2 0 0 1 2/3 0 0 1 2/3 3 0 1 0 1/3 0 0 0 1 4 * 1 1 0 0 0 0 1 5 1 1 0 1/3 0 0 0 1 6 1 0 1 2/3 0 0 1 2/3 7 1 0 0 1 0 1 0 1/3 8 1 0 0 1 * 1 1 0 9 1 0 0 1 1 1 0 1/3 10 1 0 1 2/3 1 0 1 2/3 11 1 1 0 1/3 1 0 0 1 12 * 1 1 0 1 0 0 1 13 0 1 0 1/3 1 0 0 1 14 0 0 1 2/3 1 0 1 2/3 15 0 0 0 1 1 1 0 1/3 w 1-2 phase excitation timing chart ph ia ia ph ib ib i out v ou i out 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 v ou 1 cyc l e = ilb01557
lb1945d ps no.7633-9/9 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. simplified equations for dete rmining rc component values the equations for setting the rc oscillator circuit ri se time (t1) and fall time (t2) are shown below. t1 0.44c r (s) t2 0.72 ( c r 1000 )/( r + 1000 ) (s) (c:220 to 4700pf, r = 10 to 150k ) the oscillator frequency must be set using the simplified equations shown above. note that the triangle wave fall time (t2) is also used as the noise canceller time. usage notes 1. vref since the vref pin is the input pin for the reference voltage that sets the current, applications must be designed so that noise does not appear on this pin. 2. ground pins since this ic switches high currents, the following points concerning grounding must be observed. ? the fins on the package rear surface, pins 7 an d 8, and pins 21 and 22 must all be grounded. ? sections of the circuit that carry large currents must be implemented with wide lines in the printed circuit pattern, and must be physically separated from the small signal system. ? the e pin sense resistor (re) must be position as close as possible to the ic ground (pin 14). ? the capacitors between v cc and ground and between v bb and ground must be positioned as close as possible to the v cc and v bb pins on the printed circuit pattern. this catalog provides information as of april, 2007. specifications and information herein are subject to change without notice. t1 t2 cr t2 motor
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