MTD1121F

Stepper Motor Driver IC MTD Series MTD1121F Features Unipolar PWM Stepper Motor Driver ● Unipolar stepper motor driver ● Constant current control function（Fixed OFF Time） ● Logic supply voltage 3.3V ● TTL, CMOS compatible input ● 4-Phase input (Simultaneous ON prevention function) ● Built-in flywheel diodes ● Surface mount package with heat sink(HSOP28) HSOP28 ■Absolute maxmum ratings / Ta=25℃ Parameter Output voltage Output current Logic supply Logic input Power dissipation * Storage temperature Maximum Junction temperature Symbol VCEO(SUS) IOUT Vcc VLOGIC PD Tstg Tj Rating 80 1.2 0∼3.6 0∼Vcc 3 -40∼150 150 Unit V A V V W ℃ ℃ *50.8×50.8×1mm3 Glass Epoxy Board(FR4),250mm2 Cupper Pattern ■Pin Assignment MTD1121F OUT A Rs A OUT A NC NC NC NC 1 2 3 4 5 6 7 ■Truth table TOP VIEW 28 27 26 25 24 23 22 IN A or B L PG A IN A IN A Vs A Vref A CR A Vcc L H H IN A or B L H L H OUT A or B OFF OFF ON OFF OUT A or B OFF ON OFF OFF GND GND 8 9 10 11 12 13 14 COM NC NC NC OUT B Rs B OUT B 21 20 19 18 17 16 15 LG CR B Vref B Vs B IN B IN B PG B Shindengen Electric Mfg.Co.Ltd W1001 Stepper Motor Driver IC ■Electrical Characteristics MTD1121F Ta=25℃,Vcc=3.3V unless otherwise specified Parameter Output transistor saturation voltage Output transistor leak current Flywheel diode forward drop Flywheel diode leak current Flyback diode forward drop Flyback diode leak current Logic supply current IN"H" input voltage IN"L" input voltage IN"H" input current IN"L" input current Vref input current Vs input current Chopping frequency Oneshot off time Vs maximum voltage Symbol VCE(SAT) ICER VFFW IRFW VFFB IRFB Icc VINH VINL IINH IINL Iref Isence fCHOP tOFF Vs(max) Rt=15kΩ , Ct=2200pF VIN=3.3V VIN=0V Vref=0V Vs=0V Condition Ic=0.9A VCER=80V IFFW=0.9A VRFW=80V IFFB=0.9A VRFB=80V MIN 2.0 GND 12 TYP 1.1 1.2 1.3 30 -10 -1 20 20 MAX 1.5 10 1.5 10 2 10 100 Vcc 0.6 10 -50 -50 -50 27 0.7 Unit V μA V μA V μA mA V V μA μA μA μA kHz μs V ■Recommended operation conditions Parameter Junction temperature Logic supply Load supply Chopping frequency Symbol Tj Vcc Vmm fCHOP Recommendation -25∼120 3.13∼3.46 ∼27.5 ∼27 Unit ℃ V V kHz ■Thermal resistance Symbol θja * Rating 41 Unit ℃/W * 50.8×50.8×1mm3 Glass Epoxy Board(FR4),250mm2 Cupper Pattern Shindengen Electric Mfg.Co.Ltd W1001 Stepper Motor Driver IC ■Block diagram / Typical application MTD1121F Vcc Vz Vmm 1 Vcc CPU or GATE ARRAY IN A OUT A OUT A COM OUT B OUT B IN B CPU or GATE ARRAY IN A IN B CR A ONE SHOT Ct Rt + + ONE CR B SHOT LG Rt Ct Vref A Vcc R1 R2 Vs A Rs A PG A Rf Cf Rs TAB PG B Rs B Vs B Rf Rs Cf Vref B ●Constant chopping current level Vref Ichop = Rs ●Recommended component values Symbol Rs Cf Rf Ct Rt Recommended value 0.68 3300 1.0 3300 8.2 Vmm×1.2∼1.5 ＜10 Unit Ω pF kΩ pF kΩ V ｋΩ ●One shot off time toff = 0.69×Ct×Rt Vz R1+R2 Shindengen Electric Mfg.Co.Ltd W1001 Stepper Motor Driver IC ■Outline Drawing MTD1121F (Unit : mm) Shindengen Electric Mfg.Co.Ltd W1001 Stepper Motor Driver IC MTD1121F ! Although we are constantly making every effort to improve the quality and reliability of our products, there nevertheless remains a certain probability that the semiconductor products may occasionally fail or malfunction. Please take careful precautions against product failures or malfunctions to avoid any injuries, fire accidents or social loss by implementing safety designs such as redundancy designs, designs for fi re spread prevention, and designs for preventing malfunctions. Our semiconductor products listed in this document are not designed or manufactured to be used in devices or systems requiring extremely high levels of quality and reliability, or the failure or malfunction of which may directly threaten human lives or cause injury. In the cases where the products are to be used in devices or systems for special applications or devices or systems for specialized applications shown below, always make sure to consult us in advance. Special Applications Transportation devices (automotive, marine, etc.), communication devices for core network, traffic signal devices, fire prevention/anticrime devices, various safety devices, medical devices, etc. Specialized Applications Nuclear power control systems, aircraft and aerospace devices, submarine relay devices, and systems for preserving life, etc. Even if it is not for a special or specialized application, when IC products are to be used for devices or systems that are desired to last for a long period under continuous operation, please make sure to consult our sales representative in advance. ! ● We reserve the right to make any changes to the contents of this manual without prior notice in accordance with modifications to IC products. ● Details of specifications should be exchanged at the adoption of the IC products. ● All information included in this manual is believed to be accurate and reliable. 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