BD6385EFV_11

1/4 STRUCTURE PRODUCT SERIES TYPE FUNCTION Silicon monolithic integrated circuits Bipolar stepping motor driver BD6385EFV ・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 Limit Unit -0.2～+36.0 V 1 W 1.6※ Power dissipation Pd 4.7※2 W Input voltage for control pin VIN -0.2～+5.5 V RNF maximum voltage VRNF 0.5 V ※3 Maximum output current IOUT 1.5 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 12.8mW/℃ for operating above Ta=25℃. ※2 4-layer recommended board. Derating in done at 37.6mW/℃ for operating above Ta=25℃. ※3 Do not, however exceed Pd, ASO and Tjmax=150℃. Symbol VCC0,1,2 ○Recommended operating conditions (Ta=-25～+75℃) Item Symbol Min Supply voltage VCC0,1,2 10 Output current IOUT ※4 Do not, however exceed Pd, ASO. This product isn’t designed for protection against radioactive rays. Typ 24 1.0 Max 28 1.2※4 Unit V A/phase REV. B 2/4 ○Electrical characteristics (Unless otherwise specified Ta=25℃, VCC0,1,2=24V) Item Symbol Min Limit Typ Max Unit Conditions 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 RON ILEAK IRNFS IRNF IVREF VREF IMTH VMTH VCTH tONMIN -2.0 -40 -2.0 0 -2.0 0 0.36 0.3 1.0 -0.2 -20 -0.1 -0.1 0.4 0.7 1.3 10 2.0 3.5 0.44 1.2 mA mA V V μA μA PS=L PS=H, VREFX=2V VIN=5V VIN=0V IOUT=1.0A, Sum of upper and lower Ω μA μA μA μA V μA V V μs RNFXS =0V RNFX=0V VREFX=0V MTHX=0V VREFX=2V R=39kΩ,C=1000pF REV. B 3/4 ○Package outline Product No. BD6385EFV Lot No. HTSSOP-B40 (Unit:mm) ○Block diagram ○Pin No. / Pin name Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Pin name NC RNF1 RNF1S NC OUT1B NC OUT1A NC VCC1 NC CR1 NC MTH1 VREF1 SELECT CW_CCW NC CLK PS TEST Pin No. 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Pin name VCC0 NC GND MODE0 MODE1 ENABLE VREF2 MTH2 NC CR2 NC VCC2 NC OUT2A NC OUT2B NC RNF2S RNF2 GND Buffer VREF1 14 DAC Current Limit Comp. 9 VCC1 7 OUT1A CR1 11 CR Timer Logic Predriver 5 OUT1B 2 RNF1 MTH1 13 CLK 18 MODE0 24 MODE1 25 CW_CCW 16 ENABLE 26 SELECT 15 Buffer VREF2 27 DAC Translator TSD RESET Current Limit Comp. OCP 3 RNF1S 21 VCC0 23 GND 19 PS Reg OVLO UVLO 32 VCC2 34 OUT2A CR2 30 CR Timer Logic Predriver 36 OUT2B 39 RNF2 MTH2 28 TEST 20 OCP 38 RNF2S 40 GND NC : Non Connection REV. B 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 exposes its frame of the backside of package. Note that this part is assumed to use after providing heat dissipation treatment to improve heat dissipation efficiency . Try to occupy as wide as possible with heat dissipation pattern not only on the board surface but also the backside. (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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