1/4 STRUCTURE Silicon monolithic integrated circuits PRODUCT SERIES Bipolar stepping motor driver TYPE BD6381EFV FUNCTION ・PWM constant current controllable two H bridge driver ・Power save mode ・Reference voltage output ・Low on resistance DMOS ○Absolute maximum ratings (Ta=25℃) Item Symbol Supply voltage VCC VCC Supply voltage VM VM Limit Unit -0.2～+7.0 V -0.2～+15.0 V 1.1※1 W Power dissipation Pd 4.0※2 W Input voltage for control pin VIN -0.2～(VCC +0.3) V RNF maximum voltage VRNF 0.5 V Maximum output current IOUT 1.2※3 A/ch 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 8.8mW/℃ for operating above Ta=25℃ ※2 4-layer recommended board. Derating in done at 32.0mW/℃ for operating above Ta=25℃. ※3 Do not exceed Pd, ASO. ○Operating conditions (Ta=-25～+75℃) Item Symbol Supply voltage VCC VCC Supply voltage VM VM Input voltage for control VIN Output current (DC) IOUT ※4 Min. 2.5 6.0 0 - Typ. 3.3 7.2 0.6 Do not exceed Pd, ASO. This product isn’t designed for protection against radioactive rays. REV. A Max. 5.5 13.5 VCC 0.8※4 Unit V V V A/ch 2/4 ○ Electrical characteristics (Unless otherwise specified Ta=25℃､VCC=3.3V､VM=7.2V) Item Min. Limit Typ. Max. - 0 1.6 0 0.09 10 3.0 10 0.50 μA mA μA mA PS=L PS=H, VLIMX=0.5V PS=L PS=H, VLIMX=0.5V 2.0 0 15 -10 30 0 3.3 0.8 60 - V V μA μA VIN =3V VIN =0V RON - 1.0 1.25 Ω ILEAK - - 10 μA IRNF -40 -2.0 -2.0 0 -10 0.3 0.97 -20 -0.1 -0.1 0.7 1.00 0.5 10 1.2 1.03 μA μA μA V mV μs V Symbol Whole VCC current at standby ICCST VCC current ICC VM current at standby IVMST VM current IVM Control input (PS, IN1A, IN1B, IN2A, IN2B) H level input voltage VINH L level input voltage VINL H level input current IINH L level input current IINL Output (OUT1A, OUT1B, OUT2A, OUT2B) Output ON resistance Output leak current Current control RNFX input current SENSEX input current VLIMX input current VLIMX input voltage range Comparator offset voltage Noise cancel time VREF voltage ISENSE IVLIM VVLIM VOFS tn VVREF Unit ○ Input-output logic table INPUT OUTPUT IN1A IN1B OUT1A OUT1B PS IN2A IN2B OUT2A OUT2B L X X OPEN OPEN All circuit Standby H L L OPEN OPEN Standby H H L H L Forward H L H L H Backward H H H L L Brake X: H or L REV. A Conditions IOUT =±0.6A, VM=7.2V Sum of upper and lower RNFX=0V SENSEX=0V VLIMX=0V R=39kΩ, C=1000pF IVREF=0~1mA 3/4 ○ Package outline Product No. BD6381 Lot No. HTSSOP-B24 (Unit:mm) ○Block diagram ○Pin No. / Pin name VCC 24 VREF VREF 23 Current Limit Comp. VLIM1 3 9 VM1 Predriver 10 OUT1A 11 OUT1B 12 RNF1 CR1 5 CR Timer 4 SENSE1 PS 2 UVLO IN1A 6 IN1B 7 IN2A 19 IN2B 18 CR2 20 Logic Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 Pin name GND PS VLIM1 SENSE1 CR1 IN1A IN1B NC VM1 OUT1A OUT1B RNF1 TSD NC : Non Connection OCP 16 VM2 CR Timer Predriver 15 OUT2A 14 OUT2B 13 RNF2 VLIM2 22 Current Limit Comp. 21 SENSE2 1 GND REV. A Pin No. 13 14 15 16 17 18 19 20 21 22 23 24 Pin name RNF2 OUT2B OUT2A VM2 NC IN2B IN2A CR2 SENSE2 VLIM2 VREF VCC 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. 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. 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