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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. 90711 sy 20110902-s00001 no.a1975-1/17 LV8772 overview the LV8772 is a stepping motor driver, which is capable of micro-step drive and supports 4w 1-2 phase excitation. it is stepping motors used in office equipment and amusement applications. features ? low on resistance (upper side : 0.3 ; lower side : 0.25 ; total of upper and lower : 0.55 ; ta = 25 c, i o = 2.5a) ? excitation mode can be set to 2-phase, 1-2 phase, w1-2 phase , or 4w1-2 phase ? bicdmos process ic ? ? motor current selectable in four steps ? ? unusual condition warning output pins ? specifications absolute maximum ratings at ta = 25 c parameter symbol conditions ratings unit supply voltage vm max 36 v output peak current i o peak tw 10ms, duty 20% 3.0 a output current i o max 2.5 a logic input voltage v in -0.3 to +6 v moni/emo input voltage vmoni/vemo -0.3 to +6 v allowable power dissipation pd max1 1 unit 3.0 w pd max2 * 5.4 w 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 2-layer boar d, with backside mounting. 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 : ena1975
LV8772 no.a1975-2/17 allowable operating ratings 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 imst st = ?l? 100 400 a current drain im st = ?h?, with no load 3.2 5 ma vreg5 output voltage vreg5 i o = -1ma 4.5 5 5.5 v thermal shutdown temperature tsd design guarantee 150 180 200 c thermal hysteresis width tsd design guarantee 40 c motor driver output on resistance ronu i o = 2.5a, upper-side on resistance 0.3 0.4 rond i o = 2.5a, lower-side on resistance 0.25 0.33 output leakage current i o leak 50 a diode forward voltage vd id = -2.5a 1.2 1.4 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 logic high-level input voltage v in h 2.0 v logic low-level input voltage v in l 0.8 v current setting comparator threshold voltage (current step switching) 4w1-2-phase drive vtdac0_4w step 0 (when initialized : channel 1 comparator level) 0.291 0.3 0.309 v vtdac1_4w step 1 (initial state+1) 0.291 0.3 0.309 v vtdac2_4w step 2 (initial state+2) 0.285 0.294 0.303 v vtdac3_4w step 3 (initial state+3) 0.279 0.288 0.297 v vtdac4_4w step 4 (initial state+4) 0.267 0.276 0.285 v vtdac5_4w step 5 (initial state+5) 0.255 0.264 0.273 v vtdac6_4w step 6 (initial state+6) 0.240 0.249 0.258 v vtdac7_4w step 7 (initial state+7) 0.222 0.231 0.240 v vtdac8_4w step 8 (initial state+8) 0.201 0.210 0.219 v vtdac9_4w step 9 (initial state+9) 0.180 0.189 0.198 v vtdac10_4w step 10 (initial state+10) 0.157 0.165 0.173 v vtdac11_4w step 11 (initial state+11) 0.134 0.141 0.148 v vtdac12_4w step 12 (initial state+12) 0.107 0.114 0.121 v vtdac13_4w step 13 (initial state+13) 0.080 0.087 0.094 v vtdac14_4w step 14 (initial state+14) 0.053 0.060 0.067 v vtdac15_4w step 15 (initial state+15) 0.023 0.030 0.037 v w1-2-phase drive vtdac0_w step 0 (when initialized : channel 1 comparator level) 0.291 0.3 0.309 v vtdac4_w step 4 (initial state+1) 0.267 0.276 0.285 v vtdac8_w step 8 (initial state+2) 0.201 0.21 0.219 v vtdac12_w step 12 (initial state+3) 0.107 0.114 0.121 v 1-2 phase drive vtdac0_h step 0 (when initialized : channel 1 comparator level) 0.291 0.3 0.309 v vtdac8_h step 8 (initial state+1) 0.201 0.21 0.219 v 2 phase drive vtdac8_f step 8' (when initialized : channel 1 comparator level) 0.291 0.3 0.309 v current setting comparator threshold voltage (current attenuation rate switching) vtatt00 att1 = l, att2 = l 0.291 0.3 0.309 v vtatt01 att1 = h, att2 = l 0.232 0.24 0.248 v vtatt10 att1 = l, att2 = h 0.143 0.15 0.157 v vtatt11 att1 = h, att2 = h 0.053 0.06 0.067 v chopping frequency fchop cchop = 180pf 45 55 65 khz chop pin charge/discharge current ichop 7 10 13 a continued on next page.
LV8772 no.a1975-3/17 continued from preceding page. parameter symbol conditions ratings unit min typ max chopping oscillation circuit threshold voltage vtup 0.8 1 1.2 v vtdown 0.4 0.5 0.6 v vref pin input current ir ef vref = 1.5v -0.5 a moni pin saturation voltage vsatmon imoni = 1ma 400 mv charge pump vg output voltage vg 28 28.7 29.8 v rise time tong vg = 0.1 f, cp1-cp2 = 0.1 f, st = ?h? vg = vm+4v 200 500 s oscillator frequency fosc 90 125 150 khz output short-circuit protection emo pin saturation voltage vsatemo iemo = 1ma 400 mv package dimensions unit : mm (typ) 3147c pd max - ta 0 1.0 2.0 2.20 7.0 3.0 5.4 2.8 1.5 ? 20 40 60 80 20 0 100 5.0 6.0 ambient temperature, ta -c allowable power dissipation, pd max -w 1 unit with substrate 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
LV8772 no.a1975-4/17 block diagram att1 att2 emo rst step fr md2 md1 chop st tsd lvs vref sgnd vreg5 moni vm pgnd cp1 cp2 vg rf1 out a out b out2a out2b rf2 vm2 vm + - + - + - + - output control logic charge pump regulator output preamplifier stage current selection (4w1-2/ w1-2/1-2/2) oscillation circuit attenuator (4 levels selectable) output preamplifier stage output preamplifier stage output preamplifier stage current selection (4w1-2/ w1-2/1-2/2)
LV8772 no.a1975-5/17 pin assignment pin functions pin no. pin name pin func ttion equivalent circuit 25 24 20 19 18 17 16 att2 att1 rst step fr md2 md1 motor holding current switching pin. motor holding current switching pin. reset input pin step signal input pin cw / ccw signal input pin excitation mode switching pin 2 excitation mode switching pin 1 vreg5 gnd 15 st chip enable pin. vreg5 gnd continued on next page. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 28 27 26 25 24 23 out1a pgnd cp2 cp1 vreg5 vm1 att2 att1 rf1 emo out1b chop out2a moni rst rf2 step fr vm2 md2 md1 pgnd st out2b vref gnd top view LV8772 vm vg
LV8772 no.a1975-6/17 continued from preceding page. pin no. pin name pin func ttion equivalent circuit 12 4/11 10 9 8 7 6 5 3 out2b pgnd vm2 rf2 out2a out1b rf1 vm1 out1a channel 2 outb output pin. power system ground. channel 2 motor power supply connection pin. channel 2 current-sense resistor connection pin. channel 2 outa output pin. channel 1 outb output pin. channel 1 current-sense resistor connection pin. channel 1 motor power supply pin. channel 1 outa output pin gnd 7 12 10 5 8 3 6 9 11 4 2 1 28 27 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 27 28 1 2 14 vref constant current control reference voltage input pin gnd vreg5 26 vreg5 internal power supply capacitor connection pin gnd vm continued on next page.
LV8772 no.a1975-7/17 continued from preceding page. pin no. pin name pin func ttion equivalent circuit 23 21 emo moni output short-circuit state warning output pin. position detection monitor pin. vreg5 gnd 22 chop chopping frequency setting capacitor connection pin gnd vreg5
LV8772 no.a1975-8/17 description of operation input pin function (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 stepping mode drive method (1) step pin function input operating mode st stp low * standby mode high excitation step proceeds high excitation step is kept (2) excitation mode setting function md1 md2 excitation mode initial position channel 1 channel 2 low low 2 phase excitation 100% -100% high low 1-2 phase excitation 100% 0% low high w1-2 phase excitation 100% 0% high high 4w1-2 phase excitation 100% 0% this is the initial position of each excitation mode in th e initial state after power-on and when the counter is reset. (3) position detection monitoring function the moni position detection monitoring pin is of an open drian type. when the excitation position is in the initial positi on, the moni output is placed in the on state. (refer to "examples of current waveforms in each of the excitation modes.") (4) 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-current control is set using the calculation formula below : i out = (vref/5)/rf resistance * the above setting is the output current at 100% of each excitation mode. the voltage input to the vref pin can be switched to four-step settings depending on the statuses of the two inputs, att1 and att2. this is effective for reducing power consumption when motor holding current is supplied. attenuation function for vref input voltage att1 att2 current setting reference voltage attenuation ratio low low 100% high low 80% low high 50% high high 20% the formula used to calculate the output current when using the function for attenuating the vref input voltage is given below. i out = (vref/5) (attenuation ratio)/rf resistance
LV8772 no.a1975-9/17 example : at vref of 1.5v, a reference voltage setting of 100% [(att1, att2) = (l, l)] and an rf resistance of 0.22 , the output current is set as shown below. i out = 1.5v/5 100%/0.22 = 1.36a if, in this state, (att1, att2) is se t to (h, h), iout will be as follows : i out = 1.36a 20% = 272ma in this way, the output current is attenuated when th e motor holding current is supplied so that power can be conserved. (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. this ic is the blanking time is fixed at approximately 1 s. (6) reset function rst operating mode low normal operation high reset state when the rst pin is set to high, the excitation position of th e output is forcibly set to the initial state, and the moni output is placed in the on state. when rst is then set to low, the excitation position is advanced by the next step input. rst reset 0% step moni 1ch output 2ch output initial state
LV8772 no.a1975-10/17 (7) forward/reverse switching function fr operating mode low clockwise (cw) high counter-clockwise (ccw) the internal d/a converter proceeds by one bit at the rising edge of the input step pulse. in addition, cw and ccw mode are switched by setting the fr pin. in cw mode, the channel 2 current phase is delayed by 90 relative to the channel 1 current. in ccw mode, the channel 2 current phase is adva nced by 90 relative to the channel 1 current. (8) chopping frequency setting for constant-current control, this ic performs chopping operations at the frequency determined by the capacitor (cchop) connected between the chop pin and gnd. the chopping frequency is set as shown below by the capacitor (cchop) connected between the chop pin and gnd. fchop = ichop/ (cchop vtchop 2) (hz) ichop : capacitor charge/discharge current, typ 10 a vtchop : charge/discharge hysteresis voltage (vtup-vtdown), typ 0.5v for instance, when cchop is 180pf, the chopping frequency will be as follows : fchop = 10 a/ (180pf 0.5v 2) = 55khz fr cw mode cw mode ccw mode step excitation position 1ch output 2ch output (1) (2) (3) (4) (5) (6) (5) (4) (3) (4) (5)
LV8772 no.a1975-11/17 (9) output current vector locus (o ne step is normalized to 90 degrees) setting current ration in each excitation mode step 4w1-2 phase (%) w1-2 phase (%) 1-2 phase (%) 2-phase (%) channel 1 channel 2 channel 1 channel 2 channel 1 channel 2 channel 1 channel 2 0 100 0 100 0 100 0 1 100 10 2 98 20 3 96 29 4 92 38 92 38 5 88 47 6 83 55 7 77 63 8 70 70 70 70 70 70 100 100 9 63 77 10 55 83 11 47 88 12 38 92 38 92 13 29 96 14 20 98 15 10 100 16 0 100 0 100 0 100 0.0 33.3 66.7 100.0 0.0 33.3 66.7 100.0 channeel 2 phase vurrent ratio(%) channeel 1 phase vurrent ratio(%)
LV8772 no.a1975-12/17 (10) typical current waveform in each excitation mode 2-phase excitation (cw mode) 1-2 phase excitation (cw mode) step moni l1 (%) (%) -100 -100 100 100 0 0 i2 step moni i1 (%) -100 -100 100 (%) 100 0 0 i2
LV8772 no.a1975-13/17 w1-2 phase excitation (cw mode) 4w1-2 phase excitation (cw mode) step moni i1 (%) -100 -100 100 (%) 100 0 0 i2 step moni [%] i1 i2 [%] 100 50 0 -50 -100 100 50 0 -50 -100
LV8772 no.a1975-14/17 (11) current control operation 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 fchop coil current step set current set current forced charge section forced charge section fast slow fast slow charge current mode fchop coil current step set current set current forced charge section charge
LV8772 no.a1975-15/17 output short-circuit protection function this ic incorporates an output short-circuit protection circu it that, when the output has been shorted by an event such as shorting to power or shorting to ground, sets the output to the standby mode and turns on the warning output in order to prevent the ic from being damaged. this function sets the output to the standby mode for both channels by detecting the short-circuiting in one of the channels. (1) output short-circuit protection method the output short-circuit protection method of LV8772 is a latch method to turn off the output when the output current exceeds the detection current, and to maintain the state. the detection of the output short-circuited state by the ic causes the output short-circuit protection circuit to be activated. all the outputs of correspondence ch side where the short-circuit was first detected are switched to the standby mode when the short-circuit is the consecutive be tween internal timers (approximately 4 s), and the state is maintained. this state is released by setting st to low. (2) unusual condition warning output pins (emo) the LV8772 is provided with the emo pin which notifies the cpu of an unusual condition if the protection circuit operates by detecting an unusual condition of the ic. this pin is of the open-drain output type and when an unusual condition is detected, the emo output is placed in the on (emo = low) state. furthermore, the emo pin is placed in the on state when one of the following conditions occurs. 1. shorting-to-power, shorting-to-ground, or shorting-to-load occurs at the output pin and the output short-circuit protection circuit is activated. 2. the ic junction temperature rises and the thermal protection circuit is activated. short-circuit short- circuit short-circuit detection state h-bridge output state internal counter 1st counter start 1st counter stop 1st counter start 1st counter end release output on standby state
LV8772 no.a1975-16/17 charge pump circuit when the st pin is set high, the charge pump circuit operat es and the vg pin voltage is boosted from the vm voltage to the vm + vreg5 voltage. if the vg pi n voltage is not boosted sufficiently, the output cannot be controlled, so be sure to provide a wait time of tong or more after settin g the st pin high before starting to drive the motor. vg pin voltage schematic view tong st vm+vreg5 vm+4v vm vg pin voltage
LV8772 ps no.a1975-17/17 application circuit example ? stepping motor driver circuit the formulae for setting the constants in the examples of the application circuits above are as follows : constant current (100%) setting when vref = 1.5v i out = vref/5/rf resistance = 1.5v/5/0.22 = 1.36a chopping frequency setting fchop = ichop/ (cchop vtchop 2) = 10 a/ (180pf 0.5v 2) = 55khz this catalog provides information as of september, 2011. specifications and information herein are subject to change without notice. sanyo semiconductor co.,ltd. assumes no responsib ility 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 semiconductor co.,ltd. products described or contained herein. sanyo semiconductor co.,ltd. strives to supply high-quality high-reliab ility pr oducts, however, any and all semiconductor products fail or malfunction with some probab ility. it is possible that these pr obab ilistic 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 dam age 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. 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 intellctual property rights which has resulted from the use of the technical information and products mentioned above. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equip ment, 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 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. vg vm cp1 vreg5 att2 att1 emo chop moni step fr md2 rst vref gnd md1 cp2 out1a vm1 rf1 out1b out2a rf2 st vm2 out2b pgnd 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 28 27 26 25 24 23 LV8772 +- 180pf 24v 1.5v + - m pgnd logic input clock input short-circuit state detection monitor position detection monitor

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