Innovations Embedded Motor Drivers Stepper Motor Driver Series O f fice Ma chines ROHM MarketingUSA S ewing M ac i n e s Se c u r i ty C am e r as R o b o ti c s Fac to r y A u t om a t i on Selection Guide Stepper Motor Drivers from ROHM Semiconductor ROHM Stepper Motor Drivers (SMDs) offer designers a selection of products with the performance features required for printers and copiers, scanners, security cameras, robotics, sewing machines, factory automation and other applications requiring precision motor control. Five product series are offered providing the ability to optimize the combination of function, performance, power and package size. Reliable operation is the hallmark of ROHM Stepper Motor Drivers. A built-in voltage regulator in most models eliminates the need for control sequencing during power ON/OFF to prevent circuit malfunctions. ROHM SMDs also incorporate voltage, current and thermal protection circuits not typically found in this class of device. Plus, ROHM’s exclusive Ghost Supply Prevention function prevents aberrant operation in OFF mode. Finally, ROHM’s fabrication process yields products that exhibit exceptional ESD withstand, low ON resistance and low heat generation. The small package sizes are further enhanced by the reduction in external components. Built-in translator Built-in regulator Multiple protection circuits CLK IN models simplify circuit design and drive the motor using only one clock signal. Eliminates power supply sequence control and simplifies circuit layout. Built in TSD, UVLO and OCP for greater reliability and safety. Logic input with Ghost Supply Prevention Prevents control signals from passing through during OFF, eliminating IC malfunctions due to inadvertant power ON. Constant current control tuning function Adjacent pin short protection Variable chopping frequency, combined with current decay switching, increases torque while reducing vibration. DMOS output For low ON-resistance, low heat generation and high ESD resistance. 1.888.775.ROHM www.rohmsemiconductor.com 1 One failure mode typical of ICs is adjacent pin shorts. ROHM prevents this by utilizing a symmetrical pin configuration. CNA10001_sg Stepper Motor Drivers from ROHM Semiconductor Important Performance Benefits of ROHM SMDs ROHM’s stepping motor drivers utilize PWM constant current drive for increased efficiency and eliminate the need for additional circuitry (i.e. snubber circuit), resulting in lower power consumption. Vcc Output voltage (V) PWM constant current drive significantly increases efficiency Time (T) PWM drive No charge pump required, eliminating the need for external capacitors Charge pump With no charge pump, there is no need for external capacitors, contributing to greater miniaturization while eliminating capacitor shorts, resulting in greater reliability. PMOS Pre driver Motor output NMOS No external components Only one power supply needed due to built-in regulator Simpler 24V Regulator All ROHM stepper motor drivers (except the low voltage line) feature an integrated voltage regulator that eliminates the need for an additional power supply, simplifying design. Vcc Reg. Circuit Stepping motor Single power supply compatibility High ESD resistance (HBM) An electrostatic discharge resistance of 8kV has been achieved through optimization of processes and circuitry, ensuring high reliability in all environments. 8kV ESD resistance Thin, high power package Bottom side metal heat sink ROHM’s stepping motor drivers employ a thin package with a bottom side metal heat sink, significantly increasing allowable loss while simplifying thermal design. Excellent heat dissipation 1.888.775.ROHM www.rohmsemiconductor.com 2 CNA10001_sg Stepper Motor Drivers Product Lineup High Performance - High Reliability 36V Stepping Motor Driver Series BD63877EFV BD63875EFV BD63873EFV BD63876EFV BD63874EFV BD63872EFV Standard 36V Stepping Motor Driver Series BD6290EFV BD63801EFV Microstep 36V Stepping Motor Driver Series BD63847EFV BD63843EFV BD63860EFV Low Voltage Stepping Motor Driver Series BD6381EFV BD6380EFV High Voltage Stepping Motor Driver Series BD6425EFV BD6423EFV Key Max. output current Clock IN/Parallel IN type control signal input Excitation mode (No. of steps) Small power package Built-in thermal shutdown circuit Function compatible Package type Built-in overcurrent protection circuit Pin compatible Inverse mounting protection Built-in undervoltage lock out circuit Capable of switching between forward and reverse during CLK-IN Standby current 0μA Built-in overvoltage lock out circuit SLOW/FAST/ MIX DECAY Switching function Constant current PWM ESD resistance Adjacent pin short protection One power supply system due to built-in regulator 1.888.775.ROHM www.rohmsemiconductor.com 3 CNA10001_sg Stepper Motor Drivers from ROHM Semiconductor High Performance - High Reliability - 36V Series 1.0A 1.5A 2.0A ROHM Stepping Motor Driver ROHM Stepping Motor Driver ROHM Stepping Motor Driver The carefully designed terminal configuration prevents failures due to reverse orientation or adjacent pin shorts caused by incorrect mounting or poor soldering, eliminating two major failure modes of the assembly process. Pin compatible Ultra-thin, compact size and high heat dissipation characteristics simplify thermal design — even with large currents No malfunctions due to inverse connections 1Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 No failures due to pin shorts 15 16 17 18 19 20 21 22 23 24 25 26 27 28 15 16 17 18 19 20 21 22 23 24 25 26 27 28 1Pin Safe pin configuration High heat dissipation in a compact size The compact, ultra-thin HTSSOP-B28 package The ultra-thin, compact package (HTSSOP-Bxx) dissipates heat to the substrate through the metal backside, resulting in large power dissipation. Compared with conventional HSOP packages that radiate heat through the leads, the HTSSOP-Bxx can handle large currents while reducing mounting area significantly. Top Bottom 9.7 mm Heat Heat 1.0 mm 6.4 mm Current decay mode switching function reduces vibration, even during high rotation speeds IC backside metal IC chip Heat Heat 4.7W* power dissipation Backside heat sink Substrate GND/ metal layer *4-layer substrate (backside copper foil 70mm x 70mm) MIX DECAY Favorable for torque but not for high pulse rates FAST SLOW Time MIX Output current Generally, Slow Decay mode alone causes deformation of the current waveform during high speed rotation, resulting in motor vibration. ROHM stepping motor drivers feature an MTH terminal that allows selection of FAST/SLOW/MIX DECAY modes, ensuring low vibration driving – even during high speed rotation. In addition, the FAST/SLOW ratio can be linearly set during MIX DECAY, allowing optimization of the current decay. Output current Linearly Variable SLOW/FAST Ratio SLOW DECAY FAST DECAY Output current ROHM offers 3 motor drivers (Iomax= 1.0A, 1.5A, 2.0A) that are pin-compatible, allowing different motors to be used without changing the board pattern, reducing both development time and costs. No failures due to adjacent pin shorts or inverse insertion 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Pin compatibility simplifies replacement Optimized for both torque and high pulse rates Variable Variable Favorable for high pulse rates but not for torque Time Time Adjustable FAST/SLOW ratio Low vibration, even during high speed rotation Part No. BD63877EFV BD63875EFV BD63873EFV BD63876EFV BD63874EFV BD63872EFV 1.888.775.ROHM Supply voltage(V) Input threshold voltage Output current (A) Circuit current (mA) H level voltage(V) L level voltage(V) Output ON resistance (Ω) Package Vcc 19 to 28 2.0 2.5 2.0 0.8 0.65 HTSSOP-B28 19 to 28 1.5 2.5 2.0 0.8 1.00 HTSSOP-B28 19 to 28 1.0 2.5 2.0 0.8 1.90 HTSSOP-B28 19 to 28 2.0 2.5 2.0 0.8 0.65 HTSSOP-B28 19 to 28 1.5 2.5 2.0 0.8 1.00 HTSSOP-B28 19 to 28 1.0 2.5 2.0 0.8 1.90 HTSSOP-B28 www.rohmsemiconductor.com 4 CNA10001_sg Stepper Motor Drivers from ROHM Semiconductor High Performance - High Reliability - 36V Series CLK Interface Important Features Regulator CLK CLK-IN with built-in translator — Full-step/ half-step/ quarter-step Constant current PWM driver — Variable frequency by external CR — FAST / SLOW / MIX DECAY modes Translator MODE 01 UVLO ENABLE OVLO TSD VREF + _ 2 bit DAC DMOS output (Pch+Nch) — No charge pump Built-in circuit protection — Undervoltage lockout — Overvoltage lockout — Thermal shutdown — Overcurrent protection — Adjacent pin short protection OCP VCC1 OUT1A + _ RNF1S OUT1B + _ RNF2S PS RESET MODE 02 1.0A, 1.5A and 2.0A output current models — Pin-compatible line-up — Small, thin power package (HTSSP-B28) GND CW/CCW RNF1 Blank time PWM control CR 39kȍ Predriver Single supply voltage (Vcc = 36V) with internal voltage regulator Control Logic 0.1μF 100μF OUT2A OSC 1000pF MTH ȍ RNF1S VCC2 OUT2B Mix decay control RNF2 ȍ RNF2S TEST GND Ghost supply prevention function Easy board layout with simple CLK-IN control Simple CLK-IN control Compared with PARALLEL IN devices that require drive signals from the CPU, ROHM’s CLK-IN stepper motor drivers feature a built-in translator circuit making it possible to drive stepper motors using a single CLK signal. This cuts down both the amount of software processing as well as the number of signals significantly reducing the development time, simplifying board layout and decreasing costs. Part No. BD63877EFV BD63875EFV BD63873EFV 1.888.775.ROHM Supply voltage(V) Conventional ROHM CPU PHASE1 PHASE2 I01 I02 I11 I12 Difficult to generate many complicated signals PHASE1 Stepping motor driver PHASE2 I01 I02 I11 I12 CLK IN selectable via ‘L’ SELECT Stepping motor driver CPU CLK Logic circuit Too many connections Input threshold voltage Only one simple CLK signal required Translator circuit CW-CCW ENABLE MODE0 MODE1 Simple connection makes it easy to use Drive signal generated Output current (A) Circuit current (mA) H level voltage(V) L level voltage(V) Output ON resistance (Ω) Package Vcc 19 to 28 2.0 2.5 2.0 0.8 0.65 HTSSOP-B28 19 to 28 1.5 2.5 2.0 0.8 1.00 HTSSOP-B28 19 to 28 1.0 2.5 2.0 0.8 1.90 HTSSOP-B28 www.rohmsemiconductor.com 5 CNA10001_sg Stepper Motor Drivers from ROHM Semiconductor High Performance - High Reliability - 36V Series PARALLEL Interface Important Features VCC1 Single supply voltage (Vcc, max = 36V) with internal voltage regulator 1.0A, 1.5A and 2.0A output current models — Pin-compatible line-up — Small, thin power package (HTSSP-B28) PHASE 1 OUT1A CR1 Nȍ One Shot RNF1 I 01 DAC VCC2 PHASE 2 OUT2A CR2 Nȍ One Shot 0.1μF 100μF Logic Predriver OUT2B 1000pF RNF2 I 02 DAC ȍ OCP I 12 Built-in circuit protection — Undervoltage lockout — Overvoltage lockout — Thermal shutdown — Overcurrent protection — Adjacent pin short protection Current Limit Comp. VREF TEST Buffer Regulator Regulator RESET RESET PGND TSD TSD PS GND OVLO OVLO Ghost supply prevention function 1.888.775.ROHM ȍ OCP I 11 DMOS output (Pch+Nch) — No charge pump BD63876EFV BD63874EFV BD63872EFV OUT1B Current Limit Comp. Constant current PWM driver — Variable frequency by external CR — FAST / SLOW / MIX DECAY modes Supply voltage(V) Predriver 1000pF Parallel IN — Full-step/ half-step/ quarter-step Part No. Logic UVLO UVLO Input threshold voltage Output current (A) Circuit current (mA) H level voltage(V) L level voltage(V) Output ON resistance (Ω) Package Vcc 19 to 28 2.0 2.5 2.0 0.8 0.65 HTSSOP-B28 19 to 28 1.5 2.5 2.0 0.8 1.00 HTSSOP-B28 19 to 28 1.0 2.5 2.0 0.8 1.90 HTSSOP-B28 www.rohmsemiconductor.com 6 CNA10001_sg Stepper Motor Drivers from ROHM Semiconductor High Performance - High Reliability - 36V Series Standard / PARALLEL IN Important Features 0.8A output current Parallel-In — Full-step/ half-step/ quarter-step VCC1 Single supply voltage (Vcc, max = 36V) with internal voltage regulator PHASE 1 OUT1A CR1 Nȍ One Shot Logic Predriver OUT1B 1000pF RNF1 I 01 DAC I 11 Constant current PWM driver — SLOW decay mode ȍ OCP Current Limit Comp. VCC2 PHASE 2 DMOS output (Pch+Nch) — No charge pump OUT2A CR2 Built-in circuit protection — Undervoltage lockout — Overvoltage lockout — Thermal shutdown — Overcurrent protection — Adjacent pin short protection Nȍ One Shot 0.1μF 100μF Logic Predriver OUT2B 1000pF RNF2 I 02 DAC ȍ OCP I 12 Current Limit Comp. VREF TEST Buffer RESET RESET Regulator Regulator PGND Ghost supply prevention function TSD TSD PS GND OVLO OVLO Part No. BD6290EFV 1.888.775.ROHM Supply voltage(V) UVLO UVLO Input threshold voltage Vcc Output current (A) Circuit current (mA) H level voltage(V) L level voltage(V) Output ON resistance (Ω) 19 to 28 0.8 3.0 2.0 0.8 2.8 www.rohmsemiconductor.com 7 Package HTSSOP-B24 CNA10001_sg Stepper Motor Drivers from ROHM Semiconductor High Performance - High Reliability - 36V Series Standard / CLK IN Important Features CLK Single supply voltage (Vcc, max = 36V) with internal voltage regulator Regulator FR Translator PS RESET TSD TEST MODE 0.8A output current OVLO EN Clock-In — Full-step/ half-step UVLO VCC1 Trigger OUT1A CR1 Constant current PWM driver — SLOW decay mode Nȍ One Shot Logic Predriver OUT1B 1000pF RNF1 DMOS output (Pch+Nch) — No charge pump VREF1 Built-in circuit protection — Undervoltage lockout — Overvoltage lockout — Thermal shutdown — Overcurrent protection — Adjacent pin short protection ȍ OCP Current Limit Comp. VCC2 OUT2A CR2 Nȍ One Shot 100μF Predriver OUT2B 1000pF RNF2 VREF2 PGND Ghost supply prevention function 0.1μF Logic ȍ OCP PGND Current Limit Comp. GND Part No. BD63801EFV 1.888.775.ROHM Supply voltage(V) Input threshold voltage Vcc Output current (A) Circuit current (mA) H level voltage(V) L level voltage(V) Output ON resistance (Ω) 19 to 28 0.8 2.7 2.0 0.8 2.8 www.rohmsemiconductor.com 8 Package HTSSOP-B24 CNA10001_sg Stepper Motor Drivers from ROHM Semiconductor High Performance - High Reliability - 36V Series Microstep Important Features Regulator CLK 1.0A and 2.0A output current models — Pin-compatible line-up — Small, thin power package (HTSSP-B28) GND CW/CCW Translator MODE 01 UVLO ENABLE OVLO TSD VREF CLK-IN with built-in translator — Full-step/ half-step/ eighth-step / sixteenth-step PS RESET MODE 02 + _ 4 bit DAC OCP VCC1 Constant current PWM driver — Variable frequency by external CR — FAST / SLOW / MIX DECAY modes + _ RNF1S OUT1B + _ RNF2S DMOS output (Pch+Nch) — No charge pump Blank time PWM control Built-in circuit protection — Undervoltage lockout — Overvoltage lockout — Thermal shutdown — Overcurrent protection — Adjacent pin short protection OUT1A CR 39kȍ RNF1 Predriver Single supply voltage (Vcc = 36V, max) with internal voltage regulator Control Logic ȍ 0.1μF 100μF RNF1S VCC2 OUT2A OSC 1000pF OUT2B Mix decay control MTH RNF2 ȍ RNF2S TEST GND 4 mode settings possible from full step to sixteenth step via 4-bit logic input Select between Full-Step, Half-Step, Eighth-Step or Sixteenth-Step operation based on the control input terminal settings. Full-step mode is ideal for sets requiring large current for high torque, while sixteenth-step mode features a smooth output waveform for lower noise and vibration. Part No. BD63843EFV BD63847EFV 1.888.775.ROHM Supply voltage(V) Input threshold voltage Vcc Output current (A) Circuit current (mA) H level voltage(V) L level voltage(V) 19 to 28 1.0 2.5 2.0 19 to 28 2.0 2.5 2.0 www.rohmsemiconductor.com 9 Output ON resistance (Ω) Package 0.8 1.9 HTSSOP-B28 0.8 0.85 HTSSOP-B28 CNA10001_sg Stepping Motor Drivers from ROHM Semiconductor High Performance - High Reliability - 36V Microstep Buffer VREF Important Features Current Limit Comp. DAC VCC1 OUT1A CR1 Single supply voltage (Vcc = 36V) with internal voltage regulator OUT1B Predriver Logic CR Timer RNF1 MTH 2.5 output current — Small, thin power package (HTSSP-B28) OCP CLK SR MODE2 CLK-IN with built-in translator — Full-step/ half-step/ quarter-step / eighth-step VCC Reg MODE1 Translator CW/CCW TSD OVLO ENABLE Constant current PWM driver — Variable frequency by external CR — FAST / SLOW / MIX DECAY modes UVLO RESET PS VCR RESET DAC DMOS output (Pch+Nch) — No charge pump VCC2 Current Limit Comp. OUT2A CR2 Built-in circuit protection — Undervoltage lockout — Overvoltage lockout — Thermal shutdown — Overcurrent protection CR Timer OUT2B Predriver Logic RNF2 OCP GND TEST GND Ghost supply prevention function Excitation Mode Current Waveforms 4 mode settings possible from full step to eighth step via 3-bit logic input Large average current and high torque Large Large Noise/Vibration Select between Full-Step, Half-Step, Quarter-Step or Eighth-Step operation based on the control input terminal settings. Full-step mode is ideal for sets requiring large current for high torque, while eighth-step mode features a smoother output waveform for lower noise and vibration. Torque Full Step Mode Small Small Half Step Mode Selectable Quarter Step Mode Eighth Step Mode Smooth current change Select the excitation mode based on the application Part No. BD63860EFV 1.888.775.ROHM Supply voltage(V) Input threshold voltage Output current (A) Circuit current (mA) H level voltage(V) L level voltage(V) Output ON resistance (Ω) Package Vcc 16 to 28 2.5 4.0 2.0 0.8 0.8 HTSSOP-B28 www.rohmsemiconductor.com 10 CNA10001_sg Stepper Motor Drivers from ROHM Semiconductor High Performance - High Reliability - 36V Series Low Voltage Series Parallel-in (Vcc 2.5V-5.5V ) 4.7μF 0.1μF VCC Important Features 0.8A, and 1.2A output current models — Pin-compatible line-up — Small, thin power package (HTSSP-B24) VREF VREF Current Limit Comp. VLIM 1 VM 1 Parallel-In — Full-step/ half-step OUT1A Predriver OUT1B Constant current PWM driver — SLOW decay mode CR 1 Nȍ DMOS output (Pch+Nch) — No charge pump RNF1 CR Timer 1000pF SENSE 1 PS 4.7μF UVLO IN 1A Built-in circuit protection — Undervoltage lockout — Overvoltage lockout — Thermal shutdown — Overcurrent protection — Adjacent pin short protection ȍ Logic 0.1μF TSD IN 1B OCP IN 2A IN 2B VCC2 CR2 Nȍ CR Timer OUT2A Predriver 1000pF OUT2B Ghost supply prevention function VLIM 2 ȍ RNF2 SENSE 2 Current Limit Comp. GND Sta 0 μA standby current Part No. 1.888.775.ROHM Operation at low voltage Supply voltage(V) OFF 0μA standby current Input threshold voltage Output current (A) Circuit current (mA) H level voltage(V) L level voltage(V) Output ON resistance (Ω) 2.5 to 5.5 6.0 to 13.5 1.2 1.6 2.0 0.8 1.0 HTSSOP-B24 2.5 to 5.5 4.0 to 13.5 0.8 1.6 2.0 0.8 1.2 HTSSOP-B24 Vcc BD6381EFV BD6380EFV The built-in power save function features virtually no standby current, contributing to increased energy savings and longer battery life. Vcc 2.5V~ Operation is possible from a voltage as low as Vcc=2.5V, enabling compatibility with a wide range of battery-driven applications. by curr nd t en Compatible with low voltage (Vcc=2.5V) operation VM www.rohmsemiconductor.com 11 Package CNA10001_sg Stepper Motor Drivers from ROHM Semiconductor High Performance - High Reliability - Low Voltage Vcc 2.5 - 55 High reference voltage output accuracy, even during battery driving Built-in high accuracy reference voltage The high accuracy (±3%) reference voltage is stable, even during voltage fluctuations. This allows arbitrary setting of the input at the constant current limit setting terminal via external resistor division. Dependable operation is ensured, even in battery driven applications with wide voltage variations. In addition, an external analog power supply is not required, reducing overall costs. SENSE terminal enables high accuracy constant current drive Current up to 1mA with no voltage drop VREF High accuracy ±3% reference voltage built-in R1 VLIM H-bridge R2 Io A wide range of external resistances can be selected Output accuracy improved for stable driving SENSE RNF High accuracy constant current drive Conventional (Without SENSE terminal) Motor current is detected by the SENSE terminal, eliminating any adverse effects due to the internal wiring resistance, ensuring precise control (i.e. during microstep driving via external DAC), resulting in lower noise and vibration. ROHM (With SENSE terminal) IO IO OUT OUT VLIM VLIM IO = RW Error due to wiring resistance magnified VLIM RNF + RW Wiring resistance RNF When Io=400mA, VLIM IO = = 363.6 (mA)+5% RNF + RW (Comparator offset) A large 14% error is generated VLIM RNF Wiring resistance RW SENSE terminal not affected by the wiring resistance RNF Highaccuracy RNF SENSE RNF Increased accuracy with no effects from wiring resistance Greater error due to wiring resistance Drive two DC motors with the independent VM terminals IO = With a PWM comparator offset of ±10mV, wiring resistance RW=0.05Ω, VLIM=0.2V, and RNF=0.5Ω When Io=400mA, VLIM = 400 (mA)+5% IO = RNF (the offset of COMP) The output error is only 5% Drive 2 DC motors independently Conventional driver Two independent motor power supply terminals (VM) allow for two different voltage settings, making it possible to drive two different DC motors (or one stepping motor). In addition, the PWM frequency can be set separately for each output. VM ROHM Dual VM Driver Common VM VM1 Independent VM Drives motors with different voltages 12V H-bridge Stepping motor H-bridge 12V DC motor H-bridge 5V DC motor VM2 5V 8V H-bridge A common VM allows driving of stepping motors as well Compatible with a wide range of applications 1.888.775.ROHM www.rohmsemiconductor.com 12 CNA10001_sg Stepper Motor Drivers from ROHM Semiconductor High Performance - High Reliability - High Voltage Series Vcc up to 45V Important Features Regulator CLK GND CW/CCW 1.0A and 1.5A output current models — Small, thin power packages 1.0A HTSSOP-B24 1.5A HTSSOP-B28 Translator MODE 01 UVLO ENABLE OVLO TSD CLK-IN with built-in translator — Full-step/ half-step/ quarter-step VREF + _ Built-in circuit protection — Undervoltage lockout — Overvoltage lockout — Thermal shutdown — Overcurrent protection — Adjacent pin short protection OCP VCC1 RNF1S Constant current PWM driver) — Variable frequency by external CR — Four decay mode settings DMOS output (Pch+Nch) — No charge pump OUT1A + _ OUT1B RNF2S + _ RNF1 Blank time PWM control CR 2 bit DAC Parallel-In (1.0A only) — Full-step/ half-step/ quarter-step PS RESET MODE 02 39kȍ Predriver Single supply voltage with internal voltage regulator Control Logic ȍ 0.1μF 100μF RNF1S VCC2 OUT2A OSC 1000pF OUT2B Mix decay control MTH RNF2 ȍ RNF2S TEST GND Ghost supply prevention function Low noise during motor hold with external PWM excitation Self Excitation vs. External Excitation This series utilizes an external excitation (fixed frequency) PWM method for constant current control. Conventional self-excitation methods feature a timing lag between channels between regeneration and output ON, resulting in noise. Conversely, ROHM’s high voltage stepping motor drivers utilize external excitation with synchronized timing, reducing noise significantly. Self Excitation Method (Fixed OFF Time) Conventional Noise generated Output current CH1 CH2 Lag Timing Lag Between Channels (RegenerationÆOutput ON) Time External Excitation (Fixed Frequency) Low noise during Motor Hold Output current ROHM CH1 CH2 Timing Synchronized Between Channels (RegenerationÆOutput ON) Time 1.888.775.ROHM www.rohmsemiconductor.com 13 CNA10001_sg Stepper Motor Drivers from ROHM Semiconductor High Performance - High Reliability - 36V High Voltage Series (Vcc up to 45V) Current decay mode switching possible via 2-bit logic input Four decay mode settings (Slow Decay + 3 Mixed Decay modes) can be set via two 2-bit logic input terminals. Each mode features a different decay ratio between fast and slow, enabling optimization based on motor specs for lower distortion and vibration. Mixed DECAY Favorable for torque but not for high pulse rates Time MIX Output current FAST DECAY Optimized for both torque and high pulse rates SLOW FAST Output current Output current DECAY MODE switching SLOW DECAY Variable Variable Favorable for high pulse rates but not for torque Time Adjustable FAST/SLOW ratio Time Low vibration, even during high speed rotation Logic H-bridge Mixed DECAY Control CPU Set the Decay Mode based on 2bit control signals Part No. BD6425EFV BD6423EFV 1.888.775.ROHM Supply voltage(V) DEC 1 DEC 2 L L SLOW DECAY H L MIX DECAY (FAST DECAY 15%) L H MIX DECAY (FAST DECAY 40%) H H MIX DECAY (FAST DECAY 75%) Input threshold voltage Current decay mode Vcc Output current (A) Circuit current (mA) H level voltage(V) L level voltage(V) Output ON resistance (Ω) 19 to 42 1.5 2.0 2.0 0.8 1.1 HTSSOP-B28 19 to 42 1.0 2.0 2.0 0.8 2.0 HTSSOP-B24 www.rohmsemiconductor.com 14 Package CNA10001_sg Stepper Motor Drivers Package Dimensions HTSSOP-B24 HTSSOP-B28 9.7 7.8 0.5 1 0.625 12 0.17 0.65 0.65 [Unit : mm] 1.888.775.ROHM www.rohmsemiconductor.com 15 14 0.17 1.0 Max. 1.0 1 Backside 15 4.4 6.4 1.0 0.53 28 1.0 Backside 13 5.6 7.6 24 [Unit : mm] CNA10001_sg 10145 Pacific Heights Blvd., Suite 1000 San Diego, CA 92121 www.rohmsemiconductor.com | 1.888.775.ROHM NOTE: For the most current product information, contact a ROHM sales representative in your area. ROHM assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representations that the circuits are free from patent infringement. Specifications subject to change without notice for the purpose of improvement. The products listed in this catalog are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of which would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. © 2009 ROHM Semiconductor USA, LLC. Although every effort has been made to ensure accuracy, ROHM accepts no responsibility for errors or omissions. Specifications and product availability may be revised without notice. No part of this document represents an offer or contract. Industry part numbers, where specified, are given as an approximate comparative guide to circuit function only. Consult ROHM prior to use of components in safety, health or life-critical systems. All trademarks acknowledged.