SHINDENGEN Stepping Motor Driver ICs MTD Series OUTLINE DIMENSIONS MTD1120 Case : ZIP-27 (Unit : mm) FEATURES ●Constant-current chopping function (Off time fixed, self-oscillation) ●4-phase input (with inhibit for simultaneously turn ON) ●Built-in flywheel diodes RATINGS ●Absolute Maximum Ratings Ta=25℃ Item Symbol VCEO(SUS) IO VCC VIN PT Tj Tstg Output Voltage Output Current Logic Supply Voltage Logic Input Voltage Total Power Dissipation Junction Temperature Storage Temperature ●Electrical Characteristics Ta=25℃ Item Output Saturation Voltage Output Leakage Current Logic Supply Current Input High Voltage Input Low Voltage Logic High Input Current Logic Low Input Current Reference Input Current Input Current(Current Sensor) Maximum Sensing Voltage Symbol VCE(sat) ICER ICC VINH VINL lINH lINL Iref Isense VS(max.) Test Conditions Ratings 80 1.2 0～7 0～VCC 5 150 -40～150 min. Io=0.9A Unit V A V V W ℃ ℃ typ. max. 1.1 1.4 VCER=80V 10 VCC = 5V 30 70 VCC = 5V 2.7 Vcc VCC = 5V GND 1.0 VCC = 5V,VIN=5V VCC = 5V,VIN=0V VCC = 5V,Vref=0V VCC=5V,VS=0V VCC=5V Copyright & Copy;2000 Shindengen Electric Mfg.Co.Ltd 10 -10 -1 -1 -50 -50 -50 1.0 Unit V μA mA V V μA μA μA μA V Stepping Motor Driver ICs MTD1120 ● Equivalent Circuit・Basic Application Circuit ●True Table IN A or B L L H H ●Pin Assignment ●Recommended Parts Value IN A or B L H L H Out A or B OFF OFF ON OFF Out A or B OFF ON OFF OFF Symbol Rs RF CF Rt Ct Vz R1+R2 Recommended Value 0.68 1 3300 8.2 3300 Vmm×1.2～1.5 <10 Unit Ω kΩ pF kΩ pF V kΩ ●Setting of Output Current and Fixed Off Time Fig.1 shows constant current chopping wave form. Fig.1 Constant current wave form (Motor current) ○Output Current setting R2 Vcc Io = R1+R2 ・ Rs ○Fixed Off Time Setting Toff=0.69・Ct・Rt ●Recommended Operating Conditions （Ta=25℃） Item Symbol Motor Supply Voltage Vmm Output Voltage VOUT Output Current IO Output Emitter Voltage VE Logic Supply Voltage VCC Chopping Frequency fchop Operating Temperature Top Copyright & Copy;2000 Shindengen Electric Mfg.Co.Ltd min. typ. 4.75 20 -25 max. 32 70 0.9 1.0 5.25 27 120 Unit V V A V V kHz ℃