1/4 STRUCTURE Silicon monolithic integrated circuits PRODUCT SERIES Bipolar stepping motor driver TYPE BD6389FM FUNCTION ・PWM constant current controllable two H bridge driver ・Built-in translator circuit for CLK-IN control ・Full, Half, Quarter step ・Mixed Decay control ・Parallel IN control ○Absolute maximum ratings(Ta=25℃) Item Supply voltage Symbol VCC0,1,2 Limit Unit -0.2～+36.0 V 2.8※1 W Power dissipation Pd 5.2※2 W Input voltage for control pin VIN -0.2～+5.5 V RNF maximum voltage VRNF 0.5 V Maximum output current IOUT 2.2※3 A/phase Operating temperature range Topr -25～+75 ℃ Storage temperature range Tstg -55～+150 ℃ Junction temperature Tjmax 150 ℃ ※1 70mm×70mm×1.6mm glass epoxy board. Derating in done at 22.4mW/℃ for operating above Ta=25℃. ※2 4-layer recommended board. Derating in done at 41.6mW/℃ for operating above Ta=25℃. ※3 Do not, however exceed Pd, ASO and Tjmax=150℃. ○Operating conditions (Ta=-25～+75℃) Item Symbol Supply voltage VCC0,1,2 Output current IOUT ※4 Do not, however exceed Pd, ASO. Min 10 - Typ 24 1.7 This product isn’t designed for protection against radioactive rays. REV. B Max 28 4 1.9※ Unit V A/phase 2/4 ○Electrical characteristics (Unless otherwise specified Ta=25℃, VCC0,1,2=24V) Item Symbol Min Limit Typ Max Whole Circuit current at standby ICCST 1.0 3.0 Circuit current ICC 4.5 10 Control input (SELECT, CW_CCW, CLK, PS, MODE0, MODE1, ENABLE) H level input voltage VINH 2.0 L level input voltage VINL 0.8 H level input current IINH 35 50 85 L level input current IINL -10 0 Output (OUT1A, OUT1B, OUT2A, OUT2B) Output ON resistance Output leak current Current control RNFXS input current RNFX input current VREFX input current VREFX input voltage range MTHX input current MTHX input voltage range Comparator threshold Minimum on time Unit mA mA PS=L PS=H, VREFX=2V V V μA μA VIN=5V VIN=0V RON - 0.7 0.91 Ω ILEAK - - 10 μA IRNFS IRNF IVREF VREF IMTH VMTH VCTH tONMIN -2.0 -40 -2.0 0 -2.0 0 0.36 0.3 -0.2 -20 -0.1 -0.1 0.40 0.7 2.0 3.5 0.44 1.2 μA μA μA V μA V V μs REV. B Conditions IOUT=1.7A, Sum of upper and lower RNFXS =0V RNFX=0V VREFX=0V MTHX=0V VREFX=2V R=39kΩ,C=1000pF 3/4 ○Package outline 18.5±0.1 MAX18.75 (include.BURR) Product No. 6° 4°+ ｰ 4° 2.77±0.1 9.9±0.2 7.5±0.1 28 19 27 0.5±0.15 1.2±0.2 36 BD6389FM 1 0.85 9 1PIN MARK 18 +0.055 0.27 -0.045 10 2.4MAX 2. 2±0. 05 0.1±0.05 Lot No. +0.05 0.37 -0.04 0.8 0.08 M 0.08 S ○Block diagram Buffer VREF1 4 ○Pin No. / Pin name Pin No. 1 2 3 4 5 6 7 8 9 FIN 10 11 12 13 14 15 16 17 18 Current Limit Comp. DAC 35 VCC1 33 OUT1A Logic CR Timer CR1 2 Predriver 31 OUT1B 28 RNF1 OCP MTH1 3 CLK 7 MODE0 11 Reg MODE1 12 CW_CCW 6 ENABLE 13 SELECT 5 Translator RESET Buffer VREF2 14 TSD OVLO 29 RNF1S 36 VCC0 10 GND UVLO 8 PS Current Limit Comp. DAC 19 VCC2 22 OUT2A CR2 16 MTH2 15 CR Timer Logic Predriver 24 OUT2B 27 RNF2 OCP 26 RNF2S TEST 9 Pin name N.C CR1 MTH1 VREF1 SELECT CW_CCW CLK PS TEST FIN GND MODE0 MODE1 ENABLE VREF2 MTH2 CR2 N.C N.C NC : Non Connection FIN : Connect to GND REV. B Pin No. 19 20 21 22 23 24 25 26 27 FIN 28 29 30 31 32 33 34 35 36 Pin name VCC2 N.C N.C OUT2A N.C OUT2B N.C. RNF2S RNF2 FIN RNF1 RNF1S N.C. OUT1B N.C OUT1A N.C VCC1 VCC0 4/4 ○Operation 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) Power supply lines As return of current regenerated by back EMF of motor happens, take steps such as putting capacitor between power supply and GND as an electric pathway for the regenerated current. Be sure that there is no problem with each property such as emptied capacity at lower temperature regarding electrolytic capacitor to decide capacity value. If the connected power supply does not have sufficient current absorption capacity, regenerative current will cause the voltage on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the absolute maximum ratings. It is recommended to implement a physical safety measure such as the insertion of a voltage clamp diode between the power supply and GND pins. (3) GND potential The potential of GND pin must be minimum potential in all operating conditions. (4) Thermal design Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions. This IC is equipped with FIN heat dissipation terminals, but dissipation efficiency can be improved by applying heat dissipation treatment in this area. It is important to consider actual usage conditions and to take as large a dissipation pattern as possible. (5) Actions in strong electromagnetic field Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to malfunction. (6) ASO When using the IC, set the output transistor so that it does not exceed absolute maximum ratings or ASO. (7) 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. (8) Ground Wiring Pattern 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 ground potential of application 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 of any external components, either. (9) TEST pin Be sure to connect TEST pin to GND. REV. B 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. 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