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TB6643KQ 2011-06-21 1 toshiba bi-cmos integrated circuit silicon monolithic TB6643KQ full-bridge dc motor driver ic the TB6643KQ is a full-bridge dc motor driver ic employing the mos process for output power transistors. the low on-resistance mos process and pwm control enables driving dc motors with high thermal efficiency. four operating modes are selectable via in1 and in2: clockwise (cw), counterclockwise (ccw), short brake and stop. features ? power supply voltage: 50 v (max) ? output current: 4.5 a (max) ? output on-resistance: 0.55 ? (typ.) ? pwm control ? cw/ccw/short brake/stop modes ? overcurrent shutdown circuit (isd) ? overvoltage shutdown circuit (vsd) ? thermal shutdown circuit (tsd) ? undervoltage lockout circuit (uvlo) ? dead time for preventing shoot-throu gh current note: the following conditions apply to solderability: about solderability, following conditions were confirmed (1) use of sn-37pb solder bath ? solder bath temperature: 230c ? dipping time: 5 seconds ? the number of times: once ? use of r-type flux (2) use of sn-3.0ag-0 .5cu solder bath ? solder bath temperature: 245c ? dipping time: 5 seconds ? the number of times: once ? use of r-type flux weight: 2.2 g (typ.)
TB6643KQ 2011-06-21 2 block diagram (application circuit example) the application circuits shown in this document are provided for reference pu rposes only. thorough evaluation is required, especially at the ma ss production design stage. toshiba does not grant any license to any industrial prop erty rights by providing th ese examples of application circuits. pin functions pin no. pin name functional description 1 in1 control signal input pin 1 2 in2 control signal input pin 2 3 out1 output pin 1 4 gnd ground pin 5 out2 output pin 2 6 n.c. no-connect 7 vm power supply voltage pin in1 gnd out1 out2 5-v regulator vm uvlo vsd isd detection tsd isd isd detection isd detection isd detection predriver motor in2 control
TB6643KQ 2011-06-21 3 absolute maximum ratings (note) (ta = 25c) characteristics symbol rating unit power supply voltage vm 50 v output voltage v o 50 v output current 1 i o peak1 4.5 (note 1) a output current 2 i o peak2 4.0 (note 2) a input voltage v in - 0.3 to 5.5 v power dissipation p d 1.25 (note 3) w operating temperature t opr - 40 to 85 c storage temperature t stg - 55 to 150 c note: the absolute maximum ratings of a semiconductor device are a set of ratings that mu st not be exceeded, even for a moment. do not exceed any of these ratings. exceeding the rating (s) may cause the device breakdown, damage or deterioration, and may result injury by explosion or combustion. please use the TB6643KQ within the specified operating ranges. note 1: the absolute maximum output current rating of 4.5 a must be kept for out1 and out2 when vm ? 36 v. note 2: the absolute maximum output current rating of 4.0 a must be kept for out1 and out2 when vm ? 36 v. note 3: no heatsink operating ranges characteristics symbol rating unit power supply voltage vm opr 10 to 45 v pwm frequency f pwm up to 100 khz output current i o (ave.) up to 1.5 (note 1) (given as a guide) a note 1: ta = 25c, the TB6643KQ is mounted on the pcb (70 50 1.6 (mm), double-sided, cu thickness: 50 ? m, cu dimension: 67%) with no heatsink. *: the average output current shall be increased or decreased depending on usage conditions such as ambient temperature, a presence/absence of a heatsink and ic mounting method. please use the average output current so t hat the junction temperature of 150c (t j ) and the absolute maximum output current rating of 4.0 a, 4.5a are not exceeded. **: connecting the metal plate on t he rear surface of the TB6643KQ to a heat sink allows for improvement of the power dissipation capability of the TB6643KQ. please consider heat dissipation efficiency when designing the board layout. moreover, this metal plate is electrically connected to t he rear surface of the TB6643KQ; therefore, it must always be insulated or shorted to ground.
TB6643KQ 2011-06-21 4 electrical characteristics (unless otherwise specified, ta = 25c, vm = 24 v) characteristics symbol test condition min typ. max unit i cc1 stop mode ? 2.5 8 i cc2 cw/ccw mode ? 2.5 8 power supply current i cc3 short brake mode ? 2.5 8 ma v inh 2 ? 5.5 input voltage v inl 0 ? 0.8 hysteresis voltage v in (hys) ? 0.4 ? v i inh v in = 5 v ? 27 45 control circuit in1 pin, in2 pin input current i inl v in = 0 v ? ? 5 ? a pwm frequency f pwm duty: 50 % ? 100 ? khz pwm minimum pulse width f pwm (tw) (value given as a guide) 1 ? ? ? s output on-resistance r on (u + l) i o = 3 a ? 0.55 0.9 ? i l (u) vm = 50 v, v out = 0 v - 2 ? ? output leakage current i l (l) vm = v out = 50 v ? ? 2 ? a v f (u) i o = 3 a ? 1.3 1.7 diode forward voltage v f (l) i o = -3 a ? 1.3 1.7 v
TB6643KQ 2011-06-21 5 thermal performance characteristics i/o equivalent circuits the equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purposes. pin no. i/o signal i/o internal circuit in1 (1) in2 (2) digital input l: 0.8 v (max) h: 2 v (min) out1 (3) out2 (5) gnd (4) vm (7) operating supply voltage range vm = 10 to 45 v in1 (in2) 10 k ? (typ.) 185k ? (typ.) p d ? ta ambient temperature ta (c) power dissipation p d (w) (2) 0 0 14 25 50 75 100 125 150 2 4 6 8 10 12 (1) (1) with a heatsink (10c/w): ta = 25c, p d = 7.8 w (2) no heatsink: ta = 25c, p d = 1.25 w * : with an infinite heatsink: r th (j-c) = 6c/w thermal resistance pulse width t (s) out1 (out2) vm gnd 5-v regulator
TB6643KQ 2011-06-21 6 functional description the equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purposes. timing charts may be simplified for explanatory purposes. 1. i/o function table input output in1 in2 out1 out2 mode h h l l short brake l h l h cw/ccw h l h l ccw/cw l l off (hi-z) stop (caused by a release of tsd/isd) 2. undervoltage lockout circuit (uvlo) the TB6643KQ incorporates an undervoltage lockout circuit. if the power supply voltage drops under 8 v (typ.), all the output transi stors are turned off (hi-z). the uvlo circuit has a hysteresis of 0.7 v (typ .); thus the TB6643KQ recovers at 8.7 v (typ.). 8.7 v (typ.) vm voltage uvlo internal signal h l 8.0 v (typ.) uvlo operation out1, out2 h l normal operation off (hi-z) uvlo operation normal operation
TB6643KQ 2011-06-21 7 3. overvoltage shutdown circuit (vsd) the TB6643KQ incorporates an overvoltage shutdown circuit. when the power supply voltage exceeds 53 v (typ.), all the output transi stors are turned off (hi-z). the vsd circuit has a hysteresis of 3 v (typ.); thus the TB6643KQ resumes the normal operation at 50 v (typ.). note: the vsd circuit is activated if the absolute maximu m voltage rating is violated. note that the circuit is provided as an auxiliary only and does not necessarily provide the ic with a perfect protection from any kind of damages. 53 v (typ.) vm voltage vsd internal signal h l 50 v (typ.) vsd operation vsd operation out1, out2 h l normal operation off (hi-z) normal operation
TB6643KQ 2011-06-21 8 4. thermal shutdown circuit (tsd) the TB6643KQ incorporates a thermal shutdown circuit. if the junction temperature (t j ) exceeds 170c (typ.), all the output transi stors are turned off (hi-z). the shutdown is released and the TB6643KQ resumes the normal operation when both the in1 pin and in2 pin are driven low. tsd = 170c (typ.) note: the tsd circuit is activated when the junction temperature (t j ) violates the rating temperature of 150c. note that the circuit is provided as an auxiliary only and does not necessarily provide the ic with a perfect protection from any kind of damages. 170c (typ.) chip temperature: junction temperature (t j ) tsd internal signal h l tsd operation tsd operation in1, in2 h l out1, out2 h l more than 1 p s (typ.) normal operation off (hi-z) normal operation
TB6643KQ 2011-06-21 9 5. overcurrent shutdown circuits (isd) the TB6643KQ incorporates overcurrent shutdown (isd) circuits monitoring the current that flows through each of all the four output power transistors. the threshold current ranges from 4.5 a to 8 a. if any of the isds detects an overcurrent for more than 5.1 ? s (typ.), which is the predefined de tection time, all the output transistors are turned off and enter high impedance state. the shutdown is released and the TB6643KQ resumes the normal operation when both the in1 pin and in2 pin are driven low. note: the isd is activated if the absolute maximum current ra ting is violated. note that the circuit is provided as an auxiliary only and does not necessarily provide t he ic with a perfect protection from damages due to overcurrent caused by power fault, ground fault, load-short and the like. isd internal signal h l in1, in2 h l out1, out2 isd operation threshold 0 5.1 ? s (typ.) output current more than 1 ? s (typ.) normal operation off (hi-z) normal operation
TB6643KQ 2011-06-21 10 6. pwm control switching input through the in1 and in2 pins enables the pwm control of the motor driver. when the motor drive is controlled by the pwm input, the TB6643KQ repeats operating in normal operation mode and short brake mode alternately. for preventing the shoot-t hrough current in the output circuit caused by the upper and lower power transistors being turned on simultaneously, the dead time is internally generated at the time the upper and lower power transistors swit ches between on and off. this eliminates the need of inserting off time externally; thus the pwm control with synchronous rectification is enabled. note that inserting off time externally is not requ ired on operation mode changes between cw and ccw, and cw (ccw) and short brake, again, because of the dead time generated internally. pwm on t5 vm m gnd out1 vm m gnd pwm off t3 out1 vm m gnd pwm on t1 out1 vm m gnd pwm on o off t2 = 200 ns (typ.) out1 vm m gnd pwm off o on t4 = 500 ns (typ.) out1 gnd vm output voltage waveform (out1) t1 t2 t3 t5 t4
TB6643KQ 2011-06-21 11 7. output circuits the switching characteristics of the output transist ors provided to the out1 pin and out2 pin are as follows: characteristic value unit t plh 650 (typ.) t phl 450 (typ.) t r 90 (typ.) t f 130 (typ.) ns output voltage (out1, out2) 90% 10% 50% t plh t r 50% t phl 90% 10% t f pwm input (in1, in2)
TB6643KQ 2011-06-21 12 package dimensions weight: 2.2 g (typ.)
TB6643KQ 2011-06-21 13 notes on contents 1. block diagrams some of the functional blocks, circ uits, or constants in the block diagram may be omitted or simplified for explanatory purposes. 2. equivalent circuits the equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purposes. 3. timing charts timing charts may be simplified for explanatory purposes. 4. application circuits the application circuits shown in this document ar e provided for reference purposes only. thorough evaluation is required, especially at the mass production design stage. toshiba does not grant any license to any industrial property rights by prov iding these examples of application circuits. 5. test circuits components in the test circuits are used only to obtain and confirm the devi ce characteristics. these components and circuits are not guaranteed to prev ent malfunction or failure from occurring in the application equipment. ic usage considerations notes on handling of ics (1) the absolute maximum ratings of a semiconductor device are a set of ratings that must not be exceeded, even for a moment. do not exceed any of these ratings. exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result injury by explosion or combustion. (2) use an appropriate power supply fuse to ensure that a large current does not continuously flow in case of over current and/or ic failure. the ic will fully break down when used under conditions that exceed its absolute maximum ratings, when the wiring is routed improperly or when an abnormal pulse noise occurs from the wiring or load, causing a large cu rrent to continuously flow and the breakdown can lead smoke or ignition. to minimize the effects of the flow of a large current in case of breakdown, appropriate settings, such as fuse capacity, fusing time and insertion circuit location, are required. (3) if your design includes an inductive load such as a motor coil, incorporate a protection circuit into the design to prevent device malfunction or breakdown caused by the current re sulting from the inrush current at power on or the negative current result ing from the back electromotive force at power off. ic breakdown may cause injury, smoke or ignition. use a stable power supply with ics with built-in protec tion functions. if the power supply is unstable, the protection function may not operate, causing ic breakdown. ic breakdown may cause injury, smoke or ignition. (4) do not insert devices in the wrong orientation or incorrectly. make sure that the positive and negative terminals of power supplies are connected properly. otherwise, the current or power consumption may exceed the absolute maximum rating, and exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result injury by explosion or combustion. in addition, do not use any device that is applied th e current with inserting in the wrong orientation or incorrectly even just one time.
TB6643KQ 2011-06-21 14 points to remember on handling of ics (1) over current protection circuit over current protection circuits (referred to as current limiter circuits) do not necessarily protect ics under all circumstances. if the ov er current protection circuits oper ate against the over current, clear the over current stat us immediately. depending on the method of use and usage condit ions, such as exceeding absolute maximum ratings can cause the over current protection circuit to not operate properly or ic breakdown before operation. in addition, depending on the method of use and usage conditions, if ov er current continues to flow for a long time after operation, the ic may generate heat resulting in breakdown. (2) thermal shutdown circuit thermal shutdown circuits do not necessarily prot ect ics under all circumst ances. if the thermal shutdown circuits operate against th e over temperature, clear the heat generation status immediately. depending on the method of use and usage condit ions, such as exceeding absolute maximum ratings can cause the thermal shutdown circuit to not oper ate properly or ic breakdown before operation. (3) heat radiation design in using an ic with large current flow such as power amp, regulator or driver, please design the device so that heat is appropriately radiated, not to exceed the specified junction temperature (t j ) at any time and condition. these ics generate heat even during normal use. an inadequate ic heat radiation design can lead to decrease in ic life, deterioration of ic characteristics or ic breakdown. in addition, please design the device taking into considerate the effect of ic heat radiation with peripheral components. (4) back-emf when a motor rotates in the reverse direction, stops or slows down abruptly, a current flow back to the motor?s power supply due to the effect of back-emf. if the current sink capability of the power supply is small, the device?s mo tor power supply and output pins might be exposed to conditions beyond ma ximum ratings. to avoid this problem, take the effect of back-emf into consideration in system design.
TB6643KQ 2011-06-21 15 restrictions on product use ? toshiba corporation, and its subsidiaries and affiliates (collect ively ?toshiba?), reserve the right to make changes to the in formation in this document, and related hardware, software a nd systems (collectively ?product?) without notice. ? this document and any information herein may not be reproduc ed without prior written permission from toshiba. even with toshiba?s written permission, reproduction is permissible only if reproduction is without alteration/omission. ? though toshiba works continually to improve product?s quality a nd reliability, product can malfunction or fail. customers are responsible for complying with safety standards and for prov iding adequate designs and safeguards for their hardware, software and systems which minimize risk and avoid sit uations in which a malfunction or failure of product could cause loss of human life, b odily injury or damage to property, including data loss or corruption. before customers use the product, create designs including the product, or incorporate the product into their own applications, customers mu st also refer to and comply with (a) the latest versions of all relevant toshiba information, including without limitation, this document, the specificati ons, the data sheets and application notes for product and the precautions and conditions set forth in the ?toshiba semiconduc tor reliability handbook? and (b) the instructio ns for the application with which the product will be used with or for. customers are solely responsible for all aspects of their own product design or applications, including but not lim ited to (a) determining the appropriateness of the use of this product in such des ign or applications; (b) evaluating and dete rmining the applicability of any information contained in this document, or in charts, dia grams, programs, algorithms, sample application circuits, or any other referenced document s; and (c) validating all operating paramete rs for such designs and applications. toshiba assumes no liability for customers? product design or applications. ? product is intended for use in general el ectronics applications (e.g., computers, personal equipment, office equipment, measur ing equipment, industrial robots and home electroni cs appliances) or for specif ic applications as expre ssly stated in this document . product is neither intended nor warranted for use in equipment or systems that require extraordinarily high levels of quality a nd/or reliability and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious property damage or se rious public impact (?unintended use?). unintended use includes, without limit ation, equipment used in nuclear facilities, equipment used in the aerospace industry, medical equipment, equi pment used for automobiles, trains, ships and other transportation, traffic signalin g equipment, equipment used to control combustions or explosions, safety dev ices, elevators and escalato rs, devices related to el ectric power, and equipment used in finance-related fi elds. do not use product for unintended us e unless specifically permitted in thi s document. ? do not disassemble, analyze, reverse-engineer, alter, modify, translate or copy product, whether in whole or in part. ? product shall not be used for or incorporated into any products or systems whose manufacture, use, or sale is prohibited under any applicable laws or regulations. ? the information contained herein is pres ented only as guidance for product use. no re sponsibility is assumed by toshiba for an y infringement of patents or any other intellectual property rights of third parties that may result from the use of product. no license to any intellectual property right is granted by this document, whether express or implied, by estoppel or otherwise. ? a bsent a written signed agreement, except as provid ed in the relevant terms and conditions of sale for product, and to the maximum extent allowable by law, toshiba (1) assumes no liability whatsoever, including without limitation, indirect, co nsequential, special, or incidental damages or loss, including without limitation, loss of profit s, loss of opportunities, business interruption and loss of data, and (2) disclaims any and all express or implied warranties and conditions related to sale, use of product, or information, including warranties or conditions of merchantability, fitness for a particular purpose, accuracy of information, or noninfringement. ? do not use or otherwise make available product or related so ftware or technology for any m ilitary purposes, including without limitation, for the design, development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or missile technolog y products (mass destruction weapons). product and related softwa re and technology may be controlled under the japanese foreign exchange and foreign trade law and the u.s. export administration regulations. export and re-export of product or related softw are or technology are strictly prohibited except in comp liance with all applicable export laws and regulations. ? please contact your toshiba sales representative for details as to environmental matters such as the rohs compatibility of pro duct. please use product in compliance with all applicable laws and regula tions that regulate the inclusion or use of controlled subs tances, including without limitation, the eu rohs directive. toshiba assumes no liability for damages or losses occurring as a result o f noncompliance with applicable laws and regulations.

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