Stepping Motor Driver series High Performance, High Reliability 36V Series Stepping Motor Drivers BD6387xEFV Series No.12009EAT10 Description BD6387xEFV series are the high-grade type that provides the highest function and highest reliance in the ROHM stepping motor driver series. As for its basic function, it is a low power consumption bipolar PWM constant current-drive driver with power BD63877/BD63875/BD63873EFV are CLK-IN type drivers and BD63876/BD63874/BD63872EFV are PARALLEL-IN type drivers. There are excitation modes of FULL STEP & HALF STEP (2 kinds), QUARTER STEP mode, and for current decay mode, the ratio of FAST DECAY & SLOW DECAY can be freely set, so the optimum control conditions for every motor can be realized. In addition, being able to drive with one system of power supply makes contribution to the set design's getting easy. Feature 1) Single power supply input (rated voltage of 36V) 2) Rated output current:(DC) 1.0A, 1.5A, 2.0A 3) Low ON resistance DMOS output 4) CLK-IN drive mode (BD63877/63875/63873EFV) 5) PARALLEL-IN drive mode (BD63876/63874/63872EFV) 6) PWM constant current control (other oscillation) 7) Built-in spike noise cancel function (external noise filter is unnecessary) 8) Full-, half (two kinds)-, quarter-step functionality 9) Current decay mode switching function (linearly variable FAST/SLOW DECAY ratio) 10) Normal rotation & reverse rotation switching function (BD63877/63875/63873EFV) 11) Power save function 12) Built-in logic input pull-down resistor 13) Power-on reset function (BD63877/63875/63873EFV) 14) Thermal shutdown circuit (TSD) 15) Over current protection circuit (OCP) 16) Under voltage lock out circuit (UVLO) 17) Over voltage lock out circuit (OVLO) 18) Ghost Supply Prevention (protects against malfunction when power supply is disconnected) 19) Electrostatic discharge: 8kV (HBM specification) 20) Adjacent pins short protection 21) Inverted mounting protection 22) Microminiature, ultra-thin and high heat-radiation (exposed metal type) HTSSOP-B28 package 23) Pin-compatible line-up (BD63877/63875/63873EFV, BD63876/63874/63872EFV) Application PPC, multi-function printer, laser beam printer, ink jet printer, monitoring camera, WEB camera, sewing machine, photo printer, FAX, scanner, mini printer, toy, and robot etc. www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. 1/8 2012.02 - Rev.A Technical Note BD6387xEFV Series Absolute maximum ratings(Ta=25) Item Symbol VCC1,2 Supply voltage Power dissipation Pd Input voltage for control pin RNF maximum voltage Maximum output current Maximum output current (PEAK)4 Operating temperature range Storage temperature range Junction temperature 1 2 3 4 BD63877/63876EFV VIN VRNF IOUT BD63875/63874EFV -0.2+36.0 1 1.45 2 4.70 -0.2+5.5 0.7 1.53 2.03 -25+85 -55+150 +150 2.03 2.53 IOUTPEAK Topr Tstg Tjmax BD63873/63872EFV 1.03 1.53 Unit V W W V V A/phase A/phase 70mmx70mmx1.6mm glass epoxy board. Derating in done at 11.6mW/ for operating above Ta=25. 4-layer recommended board. Derating in done at 37.6mW/ for operating above Ta=25. Do not, however exceed Pd, ASO and Tjmax=150. Pulse width tw1ms, duty 20%. Operating conditions(Ta= -25+85) Item Supply voltage MaximumOutput current (DC) 5 Symbol VCC1,2 IOUT BD63877/63876EFV 1.75 BD63875/63874EFV 19~28 1.25 BD63873/63872EFV Unit V A/phase 0.75 Do not, however exceed Pd, ASO and . Electrical characteristics (Unless otherwise specified Ta=25, VCC1,2=24V) Min. Limit Typ. Max. ICCST ICC - 1.0 2.5 2.5 5.0 mA mA PS=L PS=H, VREF=3V VINH VINL IINH IINL 2.0 35 -10 50 0 0.8 100 - V V A A VIN=5V VIN=0V Output ON resistance (BD63877/63876EFV) RON - 0.65 0.85 Output ON resistance (BD63875/63874EFV) RON - 1.00 1.30 Output ON resistance (BD63873/63872EFV) RON - 1.90 2.47 Output leak current ILEAK - - 10 A IRNFS IRNF IVREF VREF IMTH VMTH tONMIN -2.0 -40 -2.0 0 -2.0 0 0.3 -0.1 -20 -0.1 -0.1 0.8 3.0 3.5 1.5 A A A V A V s VCTH 0.57 0.60 0.63 V VREF=3V 0.57 0.60 0.63 V VREF=3V, (I0X,I1X)=(L,L) Item Whole Circuit current at standby Circuit current Control input H level input voltage L level input voltage H level input current L level input current Output (OUT1A, OUT1B, OUT2A, OUT2B) Current control RNFXS input current RNFX input current VREF input current VREF input voltage range MTH input current MTH input voltage range Minimum on time (Blank time) BD63877EFV/63875EFV/63873EFV Comparator threshold BD63876EFV/63874EFV/63872EFV Comparator threshold 100% Symbol VCTH10 Unit Conditions IOUT=1.5A, Sum of upper and lower IOUT=1.0A, Sum of upper and lower IOUT=0.5A, Sum of upper and lower RNFXS=0V RNFX=0V VREF=0V MTH=0V C=1000pF, R=39k 0 Comparator threshold 67% VCTH67 0.38 0.40 0.42 V Comparator threshold 33% VCTH33 0.18 0.20 0.22 V www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. 2/8 VREF=3V, (I0X,I1X)=(H,L) VREF=3V, (I0X,I1X)=(L,H) 2012.02 - Rev.A Technical Note BD6387xEFV Series Terminal function and Application circuit diagram CLK-IN type (BD63877/63875/63873EFV) Pin Pin name Function No. 1 GND 2 OUT1B Pin No. Pin name Function Ground terminal 15 CLK Clock input terminal for advancing the electrical angle. H bridge output terminal 16 CW_CCW Connection terminal of resistor for output current detection 17 TEST Motor rotating direction setting terminal Terminal for testing (used by connecting with GND) 3 RNF1 4 RNF1S Input terminal of current limit comparator 18 MODE0 Motor excitation mode setting terminal 5 OUT1A H bridge output terminal 19 MODE1 Motor excitation mode setting terminal Non connection 20 ENABLE Power supply terminal Power supply terminal 21 NC 6 NC 7 VCC1 8 NC Non connection 22 VCC2 9 GND Ground terminal 23 NC 24 OUT2A H bridge output terminal Input terminal of current limit comparator 10 CR Connection terminal of CR for setting chopping frequency 11 NC Non connection 25 RNF2S 12 MTH Current decay mode setting terminal 26 RNF2 13 VREF Output current value setting terminal 27 OUT2B 14 PS Power save terminal 28 NC Non connection Power supply terminal Non connection Connection terminal of resistor for output current detection H bridge output terminal Non connection Logic input terminal. Refer to P.6 for detail. CLK CW_CCW 15 Power save terminal Refer to P.6 for detail. Regulator 9 GND 16 Translator MODE0 18 MODE1 19 ENABLE 14 PS RESET UVLO 20 OVLO 2bit DAC OCP Set the output currenet. Input by resistor divison. Refer to P.8 for detail. 7 VCC1 2 1000pF MTH 12 TEST Predriver Blank time PWM control 3 Control logic RNF2S CR 10 Set the current decay mode. SLOW DECAY Connect to GND. MIX DECAY Input by resistor divison. Refer to P.8, 10 for detail. 5 RNF1S Set the chopping frequency. Setting range is C:470pF1500pF R:10k200k Refer to P.8, 9 for detail. 39k Bypass capacitor. Setting range is 100uF470uF(electrolytic) 0.01uF0.1uF(multilayer ceramic etc.) Refer to P.7 for detail. Be sure to short VCC1 & VCC2. TSD VREF 13 4 22 24 OSC 27 26 Mix decay control 25 17 1 OUT1A OUT1B RNF1 0.2 100uF 0.1uF RNF1S VCC2 OUT2A OUT2B RNF2 0.2 Resistor for current. detecting. Setting range is 0.10.3. Refer to P.7 for detail. RNF2S GND Resistor for current. detecting. Setting range is 0.10.3. Refer to P.7 for detail. Terminal for testing. Connect to GND. Fig.1Block diagram & Application circuit diagram of BD63877EFV/BD63875EFV/BD63873EFV www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. 3/8 2012.02 - Rev.A Technical Note BD6387xEFV Series PARALLEL-IN type (BD63876/63874/63872EFV) Pin Pin name Function No. 1 GND 2 OUT1B 3 RNF1 Pin No. Pin name Ground terminal 15 PHASE1 H bridge output terminal 16 I01 VREF division ratio setting terminal Connection terminal of resistor for output current detection 17 I11 VREF division ratio setting terminal Phase selection pin VREF division ratio setting terminal Function Phase selection terminal 4 RNF1S Input terminal of current limit comparator 18 PHASE2 5 OUT1A H bridge output terminal 19 I02 6 NC Non connection 20 I12 VREF division ratio setting terminal 7 VCC1 Power supply terminal 21 NC Non connection 8 NC Non connection 22 VCC2 9 GND Ground terminal 23 NC 10 CR Connection terminal of CR for setting chopping frequency 24 OUT2A H bridge output terminal 11 NC Non connection 25 RNF2S Input terminal of current limit comparator 12 MTH Current decay mode setting terminal 26 RNF2 13 VREF Output current value setting terminal 27 OUT2B 14 PS Power save terminal 28 NC Power supply terminal Non connection Connection terminal of resistor for output current detection H bridge output terminal Non connection Logic input terminal. Refer to P.7 for detail. Power save terminal Refer to P.7 for detail. PHASE1 PHASE2 15 Regulator 9 GND 18 16 I01 17 I11 14 PS UVLO 19 I02 I12 20 OVLO 2bit DAC OCP Set the output currenet. Input by resistor divison. Refer to P.8 for detail. 7 VCC1 RNF1S Set the chopping frequency. Setting range is C:470pF1500pF R:10k200k R f t P 8 9 f d t il 39k 1000pF Bypass capacitor. Setting range is 100uF470uF(electrolytic) 0.01uF0.1uF(multilayer ceramic etc.) Refer to P.7 for detail. Be sure to short VCC1 & VCC2. TSD VREF 13 5 2 CR 10 MTH 12 Predriver Blank time PWM control Control logic RNF2S 3 4 22 24 OSC 27 26 Mix decay control 25 Set the current decay mode. SLOW DECAY Connect to GND. MIX DECAY Input by resistor divison. Refer to P.8, 10 for detail. 1 OUT1A OUT1B RNF1 0.2 100uF 0.1uF RNF1S VCC2 OUT2A OUT2B RNF2 0.2 Resistor for current. detecting. Setting range is 0.10.3. Refer to P.7 for detail. RNF2S GND Resistor for current. detecting. Setting range is 0.10.3. Refer to P.7 for detail. Fig.2Block diagram & Application circuit diagram of BD63876FV/BD63874FV/BD63872FV www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. 4/8 2012.02 - Rev.A Technical Note BD6387xEFV Series Points to notice for terminal description CLKClock input terminal for advancing the electrical angle(BD63877/BD63875/BD63873EFV) CLK is reflected at rising edge. The Electrical angle advances by one for each CLK input. Motor's misstep will occur if noise is picked up at the CLK terminal, so please design the pattern in such a way that there is no noise plunging. MODE0,MODE1Motor excitation mode setting terminal (BD63877/BD63875/BD63873EFV) Set the motor excitation mode. MODE0 MODE1 Excitation mode L L FULL STEP H L HALF STEP A L H HALF STEP B H H QUARTER STEP CW_CCW TerminalMotor rotating direction setting terminal (BD63877/BD63875/BD63873EFV) Set the motor's rotating direction. Change in setting is reflected at the CLK rising edge immediately after the change in setting CW_CCW Rotating direction L Clockwise (CH2's current is outputted with a phase lag of 90in regard to CH1's current) Counter Clockwise(CH2's current is outputted with a phase lead of 90in regard to CH1's H current) ENABLE TerminalOutput enable terminal (BD63877/BD63875/BD63873EFV) Turn off forcibly all the output transistors (motor output is open). At the time of ENABLE=L, electrical angle or operating mode is maintained even if CLK is inputted. Please be careful because the electrical angle at the time of ENABLE being released (ENABLE=LH) is different from the released occasion at the section of CLK=H and from the released occasion at the section of CLKL ENABLE Motor output L OPEN (electrical angle maintained) H ACTIVE PSPower save terminal (BD63877/BD63875/BD63873EFV) PS can make circuit standby state and make motor output OPEN. In standby state, translator circuit is reset (initialized) and electrical angle is initialized. Please be careful because there is a delay of 40s(max.) before it is returned from standby state to normal state and the motor output becomes ACTIVE PS State L Standby state (RESET) H ACTIVE The electrical angle (initial electrical angle) of each excitation mode immediately after RESET is as follows Please be careful because the initial state at the time of FULL STEP is different from those of other excitation modes. Excitation mode Initial electrical angle FULL STEP 45 HALFSTEP A 0 HALFSTEP B 0 QUARTER 0 STEP Protection Circuits Thermal Shutdown (TSD) This IC has a built-in thermal shutdown circuit for thermal protection. When the IC's chip temperature rises above 175 (Typ.), the motor output becomes OPEN. Also, when the temperature returns to under 150 (Typ.), it automatically returns to normal operation. However, even when TSD is in operation, if heat is continued to be added externally, heat overdrive can lead to destruction. www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. 5/8 2012.02 - Rev.A Technical Note BD6387xEFV Series Over Current Protection (OCP) This IC has a built in over current protection circuit as a provision against destruction when the motor outputs are shorted each other or VCC-motor output or motor output-GND is shorted. This circuit latches the motor output to OPEN condition when the regulated threshold current flows for 4s (Typ.). It returns with power reactivation or a reset of the PS terminal. The over current protection circuit's only aim is to prevent the destruction of the IC from irregular situations such as motor output shorts, and is not meant to be used as protection or security for the set. Therefore, sets should not be designed to take into account this circuit's functions. After OCP operating, if irregular situations continues and the return by power reactivation or a reset of the PS terminal is carried out repeatly, then OCP operates repeatly and the IC may generate heat or otherwise deteriorate. When the L value of the wiring is great due to the wiring being long, after the over current has flowed and the output terminal voltage jumps up and the absolute maximum values may be exceeded and as a result, there is a possibility of destruction. Also, when current which is over the output current rating and under the OCP detection current flows, the IC can heat up to over Tjmax=150 and can deteriorate, so current which exceeds the output rating should not be applied. Under Voltage Lock Out (UVLO) This IC has a built-in under voltage lock out function to prevent false operation such as IC output during power supply under voltage. When the applied voltage to the VCC terminal goes under 15V (Typ.), the motor output is set to OPEN. This switching voltage has a 1V (Typ.) hysteresis to prevent false operation by noise etc. Please be aware that this circuit does not operate during power save mode. Also, the electrical angle is reset when the UVLO circuit operates during CLK-IN drive mode. Over Voltage Lock Out (OVLO) This IC has a built-in over voltage lock out function to protect the IC output and the motor during power supply over voltage. When the applied voltage to the VCC terminal goes over 32V (Typ.), the motor output is set to OPEN. This switching voltage has a 1V (Typ.) hysteresis and a 4s (Typ.) mask time to prevent false operation by noise etc. Although this over voltage locked out circuit is built-in, there is a possibility of destruction if the absolute maximum value for power supply voltage is exceeded, therefore the absolute maximum value should not be exceeded. Please be aware that this circuit does not operate during power save mode. Ghost Supply Prevention (protects against malfunction when power supply is disconnected) If a signal (logic input, VREF, MTH) is input when there is no power supplied to this IC, there is a function which prevents the false operation by voltage supplied via the electrostatic destruction prevention diode from these input terminals to the VCC to this IC or to another IC's power supply. Therefore, there is no malfunction of the circuit even when voltage is supplied to these input terminals while there is no power supply. Usage Notes (1) Absolute maximum ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. If any over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses. (2) Connecting the power supply connector backward Connecting of the power supply in reverse polarity can damage IC. Take precautions when connecting the power supply lines. An external direction diode can be added. (3) Power supply Lines Design PCB layout pattern to provide low impedance GND and supply lines. To obtain a low noise ground and supply line, separate the ground section and supply lines of the digital and analog blocks. Furthermore, for all power supply terminals to ICs, connect a capacitor between the power supply and the GND terminal. When applying electrolytic capacitors in the circuit, not that capacitance characteristic values are reduced at low temperatures. (4) GND Potential The potential of GND pin must be minimum potential in all operating conditions. (5) Metal on the backside (Define the side where product markings are printed as front) The metal on the backside is shorted with the backside of IC chip therefore it should be connected to GND. Be aware that there is a possibility of malfunction or destruction if it is shorted with any potential other than GND. (6) Thermal design Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions. Users should be aware that these products have been designed to expose their frames at the back of the package, and should be used with suitable heat dissipation treatment in this area to improve dissipation. As large a dissipation pattern should be taken as possible, not only on the front of the baseboard but also on the back surface. It is important to consider actual usage conditions and to take as large a dissipation pattern as possible. www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. 6/8 2012.02 - Rev.A Technical Note BD6387xEFV Series (7) Inter-pin shorts and mounting errors When attaching to a printed circuit board, pay close attention to the direction of the IC and displacement. Improper attachment may lead to destruction of the IC. There is also possibility of destruction from short circuits which can be caused by foreign matter entering between outputs or an output and the power supply or GND. (8) Operation in a strong electric field Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to malfunction. (9) ASO When using the IC, set the output transistor so that it does not exceed absolute maximum ratings or ASO. (10) Thermal shutdown circuit The IC has a built-in thermal shutdown circuit (TSD circuit). If the chip temperature becomes Tjmax=150, and higher, coil output to the motor will be open. The TSD circuit is designed only to shut the IC off to prevent runaway thermal operation. It is not designed to protect or indemnify peripheral equipment. Do not use the TSD function to protect peripheral equipment. TSD on temperature [] (Typ.) 175 Hysteresis Temperature [] 25 (Typ.) (11) Inspection of the application board During inspection of the application board, if a capacitor is connected to a pin with low impedance there is a possibility that it could cause stress to the IC, therefore an electrical discharge should be performed after each process. Also, as a measure again electrostatic discharge, it should be earthed during the assembly process and special care should be taken during transport or storage. Furthermore, when connecting to the jig during the inspection process, the power supply should first be turned off and then removed before the inspection. (12) Input terminal of IC This IC is a monolithic IC, and between each element there is a P+ isolation for element partition and a P substrate. This P layer and each element's N layer make up the P-N junction, and various parasitic elements are made up. For example, when the resistance and transistor are connected to the terminal as shown in figure 3, When GND(Terminal A) at the resistance and GND(Terminal B) at the transistor (NPN), the P-N junction operates as a parasitic diode. Also, when GND(Terminal B) at the transistor (NPN) The parasitic NPN transistor operates with the N layers of other elements close to the aforementioned parasitic diode. Because of the IC's structure, the creation of parasitic elements is inevitable from the electrical potential relationship. The operation of parasitic elements causes interference in circuit operation, and can lead to malfunction and destruction. Therefore, be careful not to use it in a way which causes the parasitic elements to operate, such as by applying voltage that is lower than the GND (P substrate) to the input terminal. Resistor Transistor (NPN) Pin A Pin B C Pin A N P+ N P P+ N Pin B B E N Parasitic element P+ N GND P+ P B N E P substrate P substrate Parasitic element C Parasitic element GND GND GND Parasitic element Other adjacent elements Fig. 3 Pattern Diagram of Parasitic Element (13) Ground Wiring Patterns When using both small signal and large current GND patterns, it is recommended to isolate the two ground patterns, placing a single ground point at the application's reference point so that the pattern wiring resistance and voltage variations caused by large currents do not cause variations in the small signal ground voltage. Be careful not to change the GND wiring pattern potential of any external components, either. (14) TEST Terminal (BD63877/BD63875/BD63873EFV) Be sure to connect TEST pin to GND. www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. 7/8 2012.02 - Rev.A Technical Note BD6387xEFV Series Ordering part number B D 6 3 8 7 2 E F V EFV=HTSSOP-B28 - E2 E2: HTSSOP-B28 <Tape and Reel information> 9.70.1 (MAX 10.05 include BURR) (5.5) 1 Tape Embossed carrier tape (with dry pack) Quantity 2500pcs Direction of feed E2 The direction is the 1pin of product is at the upper left when you hold ( reel on the left hand and you pull out the tape on the right hand ) 14 +0.05 0.17 -0.03 1PIN MARK 1.0MAX 0.625 1.00.2 (2.9) 0.50.15 15 4.40.1 6.40.2 28 +6 4 -4 0.080.05 0.850.05 S 0.08 S 0.65 +0.05 0.24 -0.04 0.08 1pin M Reel (Unit : mm) www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. 8/8 Direction of feed Order quantity needs to be multiple of the minimum quantity. 2012.02 - Rev.A Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. 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Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. ROHM Customer Support System http://www.rohm.com/contact/ www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. R1120A