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specifications of any and all sanyo semiconductor co.,ltd. 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 ' s products or 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. the products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. if you should intend to use our products for new introduction or other application different from current conditions on the usage of automotive device, communication device, office equipment, industrial equipment etc. , please consult with us about usage conditi on (temperature, operation time etc.) prior to the intended use. if there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. 52312 sy 20120215-s00005 no.a2056-1/13 LV8771VH overview the LV8771VH is a pwm current control stepping motor driver. it is ideally suited for driving stepping motors used in office equipment and am usement applications. features ? 1 channel pwm current control stepping motor driver. ? i o max = 1.5a ? output on-resistance (high side : 0.6 ; low side : 0.4 ; total : 1.0 ; ta = 25 c, i o = 1.5a). ? micro step mode can be set to full-step, half-step (full torque), half-step, and quarter-step mode. ? built-in thermal shutdown circuit. ? no control power supply necessary. specifications absolute maximum ratings at ta = 25 c parameter symbol conditions ratings unit supply voltage v m max 36 v output peak current i o peak t 10ms, on-duty 20% 1.75 a output current i o max 1.5 a allowable power dissipation pd max * 3.0 w logic input voltage v in max -0.3 to +6 v vref input voltage vref max -0.3 to +6 v operating temperature topr -20 to +85 c storage temperature tstg -55 to +150 c * specified circuit board : 90.0mm 90.0mm 1.6mm, glass epoxy board. caution 1) absolute maximum ratings represent the va lue which cannot be exceeded for any length of time. caution 2) even when the device is used within the range of absolu te maximum ratings, as a result of continuous usage under hig h temperature, high current, high voltage, or drastic temperature change, the reliability of the ic may be degraded. please contact us for the further details. bi-cmos lsi pwm constant-current control stepping motor driver orderin g numbe r : ena2056
LV8771VH no.a2056-2/13 recommendation operating conditions at ta = 25 c parameter symbol conditions ratings unit supply voltage range vm 9 to 32 v logic input voltage v in 0 to 5.5 v vref input voltage range vref 0 to 3 v electrical characteristics at ta = 25c, vm = 24v, vref = 1.5v parameter symbol conditions ratings unit min typ max standby mode current drain imstn st = ?l? 100 150 a current drain im st = ?h?, i01 = i11 = i02 = i12 = ?l?, with no load 2 3 ma vreg5 output voltage vreg5 ireg5 = -1ma 4.7 5 5.3 v thermal shutdown temperature tsd design guarantee 150 180 210 c thermal hysteresis width tsd design guarantee 40 c motor driver output on resistance ronu i o = 1.5a, upper-side on resistance 0.6 0.78 rond i o = 1.5a, lower-side on resistance 0.4 0.52 output leakage current i o leak v m = 36v 50 a diode forward voltage vd 1.1 1.4 v logic high-level input voltage v in h 2.0 v logic low-level input voltage v in l 0.8 v logic pin input current i in l v in = 0.8v 4 8 12 a i in h v in = 5v 30 50 70 a current setting comparator threshold voltage vtdac11 i01(02) = ?h?, i11( 12) = ?h? 0.29 0.30 0.31 v vtdac01 i01(02) = ?l?, i11( 12) = ?h? 0.20 0.21 0.22 v vtdac10 i01(02) = ?h?, i11(12) = ?l? 0.11 0.12 0.13 v chopping frequency fchop1 fc = ?l? 24.8 31.0 37.2 khz fchop2 fc = ?h? 49.6 62.0 74.4 khz vref pin input current ir ef vref = 1.5v -0.5 a charge pump vg output voltage vg 28 28.7 29.8 v rise time tong vg = 0.1 f 200 500 s oscillator frequency fosc 100 125 150 khz package dimensions unit : mm (typ) 3222a sanyo : hsop28(275mil) 1 28 14 15 0.5 2.7 15.0 7.6 0.2 0.3 2.0 0.8 (0.7) 5.6 (1.5) 1.7max 0.1 pd max ? ta 0 1.0 2.0 4.0 3.0 1.56 ? 20 40 60 80 20 0100 ambient temperature, ta - c allowable power dissipation, pd max - w
LV8771VH no.a2056-3/13 block diagram ph2 i02 i12 ph1 i11 i01 fc st tsd vref gnd vreg5 vm pgnd cp1 cp2 vg rf1 out1a out1b out2a out2b rf2 vm2 vm1 + - + - + - + - output control logic charge pump regulator oscillation circuit output preamplifier stage output preamplifier stage output preamplifier stage output preamplifier stage current selection quartoe/half/full) current selection quartoe/half/full)
LV8771VH no.a2056-4/13 pin assignment 1 2 3 4 5 6 7 8 9 10 11 12 13 14 21 20 19 18 17 16 15 28 27 26 25 24 23 22 vg out1a vm pgnd2 cp2 fc cp1 nc vreg5 ph1 vm1 rf1 out1b out2a rf2 vm2 i11 nc nc sgnd st out2b vref top view LV8771VH pgnd1 i01 i12 i02 ph2
LV8771VH no.a2056-5/13 pin functions pin no. pin name pin func ttion equivalent circuit 22 21 20 25 24 23 27 ph1 i01 i11 ph2 i02 i12 fc channel 1 forward/reverse rotation pin. channel 1 output control input pin . channel 1 output control input pin . channel 2 forward/reverse rotation pin. channel 2 output control input pin . channel 2 output control input pin . chopping frequency switching pin. vreg5 gnd 26 st chip enable pin. vreg5 gnd 8 9 10 11 12 3 4 5 6 7 out1b rf1 pgnd1 vm1 out1a out2b vm2 pgnd2 rf2 out2a channel 1 outb output pin. channel 1 current-sense resistor connection pin. power system ground pin 1. channel 1 motor power supply connection pin. channel 1 outa output pin. channel 2 outb output pin. channel 2 current-sense resistor connection pin. power system ground pin 2. channel 2 motor power supply connection pin. channel 2 outa output pin. gnd 8 3 11 4 7 12 9 6 5 10 2, 13 , 17 nc no connection (no internal connection to the ic) continued on next page.
LV8771VH no.a2056-6/13 continued from preceding page. pin no. pin name pin func ttion equivalent circuit 15 14 16 18 vg vm cp2 cp1 charge pump capacitor connection pin. motor power supply connection pin. charge pump capacitor connection pin. charge pump capacitor connection pin. gnd vreg5 18 16 14 15 19 vreg5 internal power supply capacitor connection pin. gnd vm 28 vref constant current control reference voltage input pin. gnd vreg5
LV8771VH no.a2056-7/13 description of operation input pin function the function to prevent including the turn from the input to the power su pply is built into each logic pin. therefore, the current turns to the power supply even if power supply (vm) is turned off with the voltage impressed to the input pin and there is not crowding. (1) chip enable function this ic is switched between standby and operating mode by setting the st pin. in standby mode, the ic is set to power-save mode and all logic is reset. in addition, the internal regulator circuit and charge pump circuit do not operate in standby mode. st mode internal regulator charge pump low or open standby mode standby standby high operating mode operating operating (2) output control logic i01(02) i11(12) output current (i o ) low low 0 high low i o = (( vref / 5 ) / rf ) 40% low high i o = (( vref / 5 ) / rf ) 70% high high i o = ( vref / 5 ) / rf ph1(2) current direction low outb outa high outa outb (3) setting constant-current control reference current this ic is designed to automatically exercise pwm constant-current chopping control for the motor current by setting the output current. based on the voltage input to the vr ef pin and the resistance conn ected between rf and gnd, the output current that is subject to the constant-cur rent control is set using the calculation formula below: i out = (vref / 5) / rf resistance * the above setting is the output current at i01(02) = high, i11(12) = low. (example) when vref = 1.5v, i01(02) = high, i11(12) = low and rf1(2) resistance is 0.5 ? , the setting current is shown below. i out = (1.5v / 5) / 0.5 ? = 0.6a (4) chopping frequency control logic fc chopping frequency low 31khz high 62khz (5) blanking period if, when exercising pwm constant-current chopping control over the motor current, the mode is switched from decay to charge, the recovery current of the parasitic diode may fl ow to the current sensing resistance, causing noise to be carried on the current sensing resistance pin, and this may result in erroneous detection. to prevent this erroneous detection, a blanking period is provided to prevent the noise occurr ing during mode switching from being received. during this period, the mode is not sw itched from charge to decay even if no ise is carried on the current sensing resistance pin. the blanking time is fixed at approximately 1 s.
LV8771VH no.a2056-8/13 (6) current control o peration specification (sine wave increasing direction) (sine wave decreasing direction) in each current mode, the operation sequence is as described below : ? at rise of chopping frequency, the charge mode begins. (in the time defined as the ?blanking time,? the charge mode is forced regardless of the magnitude of the coil current (icoil) and set current (iref).) ? the coil current (icoil) and set current (ir ef) are compared in this blanking time. when (icoil < iref) state exists ; the charge mode up to icoil iref, then followed by changeover to the slow decay mode, and finally by the fast decay mode for approximately 1 s. when (icoil < iref) state does not exist ; the fast decay mode begins. the coil current is a ttenuated in the fast decay mode till one cycle of chopping is over. above operations are repeated. normally , the slow (+fast) decay mode continues in the sine wave increasing direction, then entering the fast decay mode till the curren t is attenuated to the set level and followed by the slow decay mode. fast slow charge fast slow charge current mode coil current step set current set current forced charge section forced charge section fast slow fast slow charge current mode coil current step set current set current forced charge section charge
LV8771VH no.a2056-9/13 (7) typical current waveform in each excitation mode full step (cw mode) half step full torque (cw mode) i01,i11 ph1 i02,i12 ph2 i1 i2 (%) -100 -100 100 (%) 100 0 0 h h i12 ph2 l1 l2 -100 -100 0 0 (%) 100 (%) 100 ph1 i02 i11 i01
LV8771VH no.a2056-10/13 half step (cw mode) quarter step (cw mode) i12 ph2 i1 (%) -100 -100 100 (%) 100 0 0 i2 i02 i11 ph1 i01 i12 ph2 i1 (%) -100 -100 100 (%) 100 0 0 i2 i02 i11 ph1 i01
LV8771VH no.a2056-11/13 (8) charge pump circuit when the st pin is set high, the charge pump circuit operates and the v g pin voltage is boosted from the v m voltage to the v m + vreg5 voltage. because the ou tput is not turned on if v m +4v or more is not pressured, the voltage of the v g pin recommends the drive of the motor to put the time of t ong or more, and to begin. v g pin voltage schematic view tong st vm+vreg5 vm+4v vm vg pin voltage
LV8771VH no.a2056-12/13 application circuit example each constant setting formula of ab ove circuit example is as below. setting of chopping frequency: 31khz (fc = low) the setting constant-current level becomes like a list. (example) i01(02) = high, i11(12) = high when vref = 1.5v, rf = 0.47 i out = vref/5/rf resistance = (1.5v/5) / 0.47 = 0.64a i01(02) i11(12) output current (i o ) low low 0 high low i o = (( vref / 5 ) / rf ) 40% low high i o = (( vref / 5 ) / rf ) 70% high high i o = ( vref / 5 ) / rf ph1(2) current direction low outb outa high outa outb sgnd nc vm2 pgnd2 rf2 out2a out1b rf1 pgnd1 vm1 out1a vm nc out2b vref fc ph2 i02 i12 ph1 i01 i11 vreg5 cp1 nc vg cp2 st 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 LV8771VH +- + - m 24v 1.5v logic input logic input
LV8771VH ps no.a2056-13/13 this catalog provides information as of may, 2012. specifications and inform ation herein are subject to change without notice. sanyo semiconductor co.,ltd. 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 specif ications of any and all sanyo semiconductor co.,ltd. products described or contained herein. regarding monolithic semiconductors, if you should intend to use this ic continuously under high temperature, high current, high voltage, or drastic temperature change, even if it is used within the range of absolute maximum ratings or operating conditions, there is a possibility of decrease reliability. please contact us for a confirmation. sanyo semiconductor co.,ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. it is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. in the event that any or all sanyo semiconductor co.,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 concerned 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 information storage or retrieval system, or otherwise, without the prior written consent of sanyo semiconductor co.,ltd. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equ ipment, refer to the "delivery specification" for the sanyo semiconductor co.,ltd. product that you intend to use. upon using the technical information or products described 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 for any claim or suits with regard to a third party's intellectual property rights which has resulted from the use of the technical information and products mentioned above.

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