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| 70611hkpc 018-10-0042/30211hkpc no.a1929-1/14 stk681-352-e overview the stk681-352-e is a hybrid ic for use in current control forward/reverse dc motor driver with brush. applications ? office photocopiers, printers, etc. features ? allows forward, reverse, and brake operations in accordance with the external input signal. ? 8a peak startup output current and 12a peak brake output current. ? on-chip output short-circuit detection function. ? reduced voltage detection function (15v) for a motor supply voltage. ? connecting an external current detection resistor allows overcurrent detection and peak current control in the pwmoperation mode. ? obviate the need to design for the dead time in order to turn off the upper- and lower drive devices when switchingbetween the forward and reverse operation mode. ordering number : ena1929a thick-film hybrid ic forward/reverse motor driver 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 el ectronics 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.
stk681-352-e no.a1929-2/14 specifications absolute maximum ratings at tc = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max 38 v input voltage v in max logic input pins -0.3 to +6.0 v output current 1 i o 1 max dc current 6.4 a output current 2 i o 2 max pulse current: 10ms 8 a output current 3 i o 3 max pulse current: 16 s 24 a brake current i o b max v dd =5.0v, square wave current, operating time 15ms (single pulse, low side brake) 12 a allowable power dissipation pdpk max no heat sink 2.8 w operating substrate temperature tc metal surface temperature of the package -20 to +105 c junction temperature tj max 150 c storage temperature tstg -40 to +125 c allowable operating ranges at ta=25 c parameter symbol conditions ratings unit operating supply voltage v cc with signals applied 18 to 29 v input voltage v in 0 to 5.5 v output current 1 i o 1 dc current, tc=80 c 4.6 a output current 2 i o 2 dc current, tc=105 c 3.8 a brake current i o b square wave current, operating time 2ms, low side brake,tc=105 c 12 a refer to the graph for each conduction-period toleranc e range for the output current and brake current. electrical characteristics at tc=25 c, v cc =24v parameter symbol conditions min typ max unit v cc supply current i cco enable=gnd, in1=in2=3.3v 9.3 11 ma fet diode forward voltage vdf if=1a (r l =23 ) 0.76 1.4 v output saturation voltage 1 vsat1 r l =23 , f1, f2 140 200 mv output saturation voltage 2 vsat2 r l =23 , f3, f4 50 85 mv output leak current i ol f1, f2, f3, and f4 off operation 50 a input high voltage v ih in1, in2, enable pins 2.5 v input low voltage v il in1, in2, enable pins 0.8 v high-level input current i il h in1, in2, enable pins, v ih =3.3v 33 50 a low-level input current i il l in1, in2, en able pins, v il =gnd 10 a overcurrent detection voltage voc between pins vref1 and s.p 0.48 v internal pwm frequency fc 32 46 62 khz overheat detection temperature tsd design guarantee 144 c note: a fixed-voltage power supply must be used. stk681-352-e no.a1929-3/14 package dimensions unit:mm (typ) derating curve of motor current, i o , vs. stk681-352-e operating board temperature, tc (the maximum pwm frequency is 50khz.) the pwm frequencies in the above graph indicate the enable signal. the same pwm i o derating curves as those shown above will be obtained when the internal pwm frequency of the stk681-352-e is used. increasing the v cc supply voltage narrows the i o derating curve range, so i o should be set in reference to the above graph. the above operating substrate temperature, tc, is measured immediately when the motor is started. since tc fluctuates due to the ambient temperature, ta, the motor current value, and continuous or intermittent operations of the motor current, always co nfirm this values using an actual set. the tc temperature should be checked in the cente r of the metal surface of the product package. (11.0) (3.5) 11.0 14.4 18 1.0=18.0 4.5 0.4 2.0 4.0 24.2 (r1.47) (18.4) 119 14.4 0.5 1.0 4.45 7 5 6 1 0 080 20 40 60 100 70 10 30 50 90 110 i o - tc operating substrate temperature, tc- c motor current, i o - a 3 4 2 dc pwm(v cc =24v) stk681-352-e no.a1929-4/14 stk681-352-e allowable brake current range (low side: f3, f4=on) stk681-352-e allowable brake current range (high side: f1, f2=on) or allowable startup current range 1.0 23 5 1000 10 72357 23 5 100 7 7 6 5 i o b - t conduction time, t - ms brake current, i o b- a 13 11 12 10 9 8 tc=25c 70c 80c 90c 105c 1.0 23 5 1000 10 72357 23 5 100 7 4 3 2 i o - t conduction time, t - ms single-pulse current, i o - a 9 7 8 6 5 tc=25c 70c 105c 80c 90c stk681-352-e no.a1929-5/14 internal block diagram unassigned pins pwm (46khz typ) constant- current control overcurrent detection setting voltage (0.48v typ) overheat detection latch output short-circuit detection power supply for logic 15 12 11 5 out1 10 8 v cc 9 7 out2 6 4 17 in2 18 enable 13 fault 19 vref 14 s.gnd v cc v dd f1 f2 f3 f4 16 in1 1 gnd 3 2 stk681-352-e no.a1929-6/14 sample application circuit motor drive conditions (h: high-level input; l: low-level input) in1 in2 enable remarks h l l l h l stop h h l turns the power supply off. enable must be set low when v cc is rising or falling. forward (cw) h l h reverse (ccw) l h h no input signal is needed that turns off the upper- and lower-side drive devices when switching the rotational direction. l l l or h v cc side brake mosfet on brake h h h gnd side brake mosfet on * output control is enabled by applying an external pwm signal to the enable pin. the product can run at a minimum external pwm pulse width of 1 s. in the case when the high pulse width is less than 16 s, however, the ic may fail to detect a short-circ uit condition when an output short-circuit occurs. fault signal is generated to indicate an error condition if v cc falls below the allowable operating range when the enable pin is set to high during motor rotation or pwm operation. for this reason, enable must be set to low when v cc is rising or falling. when both in1 and in2 are set low, the mosfet on the v cc side is driven. to minimize the loss when stopped, set in1 = in2 = high and enable = low to turn off the gate signal to the v cc side mosfets. setting the current limit using the vref pin peak output current (iop) = (vref 4.9) rs ?4.9? in the above formula indicates the portion of the vref voltage that is divided using the circuit inside the control ic. vref = (r2 (r1 + r2)) 3.3v rs is the external current detection resistance value of the hic, and vref 2.0v must be satisfied so that overcurrent detection is not triggered. fault 3.3v in1 in2 enable (dc or pwm) n.c 13 18 17 16 15 19 14 r1 vref r2 c2 10 f/50v c3 0.1 f s.gnd n.c n.c 9 7 10 8 12 11 6 5 4 3 2 1 n.c out1 out2 rs c1 47 f to /50v moto r v cc =24v gnd ccw cw stk681-352-e stk681-352-e no.a1929-7/14 notes (1) be sure to set the capacitance of the power supply bypa ss capacitor, c1, so that the ri pple current of the capacitor, which varies as motor current increas es, falls within the allowed range. (2) chopping operations based on f3 and f4 are used for current control. the timing given below is used for out1 or out2 voltage output and for f3 or f4 drain current. (3) do not connect the n.c pins (5, 11, 12 and 15 pin) shown in the internal block diagram or sample application circuit to a circuit pattern on the pcb. (4) sample timing diagram (5) if the current detection resistor, rs, connected to pin1, pin2, and pin3 is short-circuited, the overcurrent detection circuit does not operate. if the output pin is short-circuited directly to v cc or connected directly to gnd, an output short-circuit condition is detected and the output is latched in the off state. to restart the operation, turn on v dd again. (6) smoke emission precautions: there is a possibility of smoke emission if the hybrid ic is subjected to physical or electrical damage as the result of being used without compliance with the specifications. in1 in2 enable stop forward rotation brake reverse rotation stop forward rotation brake stop out1 or out2 output voltage f3 or f4 drain current motor current v cc +vdf gnd i o peak (current setting value) 0a i o peak (current setting value) 0a 22 f stk681-352-e no.a1929-8/14 i/o functions of each pin pin name pin no. function in1 16 input pin for turning f2 and f4 on and off at low level f2: on and f4: off; at high level, f2: off and f4: on in2 17 input pin for turning f1 and f3 on and off at low level f1: on and f3: off; at high level, f1: off and f3: on enable 18 pin for turning f3 and f4 on; at high level f3 and f4: on enable must be set low when v dd is rising and falling. enable must be set high to drive the motor. fault 13 monitor pin used when either of the ou tput short-circuit detector, overcurrent detector, or overheat detector is activated. when the detector is activated, this pin is set low and all of f1, f2, f3 and f4 in the final stage are latched off. out1 8, 10 this pin connects to th e motor and outputs source/sync current depending on conditions at in1 and in2. out2 4, 6 this pin connects to th e motor and outputs source/sync current depending on conditions at in1 and in2. vref 19 this pin limits the peak cu rrent when motor startup. the current setting voltage, vref, is set to the value of 4. 9 times the voltage drop of the external current detection resistor. the internal overcurrent detection level is 0.48v, so setting vref < 2.0v is recommended. gnd 1, 2, 3 power system ground s.gnd 14 control system ground v cc 7, 9 motor system supply voltage stk681-352-e no.a1929-9/14 technical information 1. configuration of each pins stk681-352-e no.a1929-10/14 stk681-352-e no.a1929-11/14 2. output short-circuit detection, over current detection and overheat detection each detection function operates using a latch system and turns output off. to restore output operation, turn the v dd power supply off and then on again to apply a power-on reset. [output short-circuit detection, overcurrent detection] when the output pin is simply co nnected to the circuit gnd or v cc , or when the output load is short-circuited, the output short circuit detector must be activated and turn the output off. constant current pwm control can be performed by connecting a current detection resistor to pins 1, 2 and 3, and setting the vref pin voltage to less than 2.0v. in addition, when this current detection resistor voltage exceeds 0.48v (typ.), the overcurrent de tector is activated and shuts the output off. [overheat detection] rather than directly detecting the temperature of th e semiconductor device, overheat detection detects the temperature of the aluminum substrate (144 c typ). within the allowed operating range of i o 1 (4.6a) recommended in the specifications , if a heat sink attached for the purpose of reducing the operating substrate temperature, tc, comes loose, the semiconductor can operate without breaking. however, we cannot guarantee operations without breaking in the case of operation other than those recommended, such as operations at a current exceeding i o h max (4.6a) that occurs before overcurrent detection is activated. 3. mitigated curve of package power loss, pdpk, vs. ambient temperature, ta package power loss, pdpk, refers to the average internal power loss, pdav, allowable without a heat sink. the figure below represents the allowable power loss, pd pk, vs. fluctuations in the ambient temperature, ta. power loss of up to 2.8w is allowable at ta=25 c, and of up to 1.5w at ta=60 c. allowable power dissipation, pdpk (no heat sink) - ambient temperature, ta 3.0 1.0 0.5 0 0 40 120 20 60 80 100 pdpk - ta ambient temperature, ta- c allowable power dissipation, pdpk - w 1.5 2.5 2.0 stk681-352-e no.a1929-12/14 4. data 0123 8 5 467 200 0 vsat1, vsat2 - i o output current, i o - a (dc) output saturation voltage, vsat1, vsat2 - mv 2600 1400 1600 1800 2000 2200 2400 1000 1200 800 600 400 tc=25c v s a t 1 v s a t 2 v s a t 1 ( 1 0 5 c ) v s a t 2 ( 1 0 5 c ) 0.40 0.45 14 0235 7 68 vdf - i o output current, i o - a (dc) diode forward voltage, vdf - v 0.60 0.65 1.00 0.50 0.55 0.70 0.75 0.80 0.85 0.90 0.95 tc=25c v d f ( h i g h s i d e) v d f ( l o w s i d e ) stk681-352-e no.a1929-13/14 5. other notes on use in addition to the ?notes? indicated in the sample application circuit, care should also be given to the following contents during use. (1) allowable operating range operation of this product assumes use within the allo wable operating range. if a supply voltage or an input voltage outside the allowable operating range is applied, an overvoltage may damage the internal control ic or the mosfet. if a voltage application mode that exceeds the a llowable operating range is an ticipated, connect a fuse or take other measures to cut off power supply to the product. (2) input pins if the input pins are connected directly to the pc board connectors, electrostatic discharge or other overvoltage outside the specified range may be applied from the connectors and may damage the product. current generated by this overvoltage can be suppressed to effectively prevent damage by inserting 100 to 1k resistors in lines connected to the input pins. take measures such as inserting resistors in lines connected to the input pins. (3) input signal lines 1) do not use an ic socket to mount the driver, and instead solder the driver directly to the pc board to minimize fluctuations in the gnd potential due to the influence of the resistance component and inductance component of the gnd pattern wiring. 2) to reduce noise due to electromagnetic induction to small signal lines, do not design small signal lines (sensor signals, 5v or 3.3v power supply signal lines) that run parallel near the motor output lines out1 and out2. 3) pins 5, 11, 12 and 15 of this product are n.c pins. do not connect any wiring to these pins. (4) when mounting multiple drivers on a single pc board when mounting multiple drivers on a single pc board, the gnd design should mount a v cc decoupling capacitor, c1, for each driver to stabili ze the gnd potential of the other drivers. the key wiring points are as follows. 3.3v input signals short 16 19 18 17 7 9 ic1 14 3 2 1 motor 1 input signals 16 19 18 17 79 ic2 14 3 2 1 motor 2 input signals 16 19 18 17 7 9 ic3 14 3 2 1 motor 3 gnd gnd 24v c1 for ic1 c1 for ic2 c1 for ic3 thick and short thick stk681-352-e no.a1929-14/14 ps this catalog provides information as of july, 2 011. specifications and info rmation 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, 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. |
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