MTD2018G

Stepper Motor Driver IC MTD Series MTD2018G Features Dual Full-bridge Microstepping PWM Motor Driver ●Dual full bridge for a bipolar stepper motor driver ●Load supply voltage 35V , Output current 0.8A ●Constant current control (Fixed OFF time PWM control) ●2-bit selectable current level (Full step/Half step/Quarter step) ●Logic supply 3.3V only ●Stand-by function ●Built-in flywheel and flyback diodes ●Under voltage lock out function ●Thermal shutdown with hysteresis ●Surface mount package with heat sink(HSOP24) ■Absolute maxmum ratings / Ta=25℃ Parameter Output voltage Output current Logic supply Logic input Power dissipation Storage temperature range Maximum Junction temperature *1 : 50.8×50.8×1mm3 Glass Epoxy Symbol Vmm IOUT Vcc VLOGIC PD *1 Tstg Tj Rating 35 0.8 0∼3.6 0∼Vcc 2.1 -40∼150 150 Unit V A V V W ℃ ℃ Cupper Pattern HSOP24 Board(FR4),200mm2 ■Pin Assignment MTD2018G PHA 1 Vcc 1 Vmm 1 OUT 1A SENSE 1 OUT 1B GND OUT 2B SENSE 2 OUT 2A Vmm 2 Vcc 2 PHA 2 7 8 9 10 11 12 18 17 16 15 14 13 1 2 3 4 5 6 ■Truth table TOP VIEW 24 23 22 21 20 19 PHA 1 or 2 L H OUT A L H Output current ratio[%] 100 67 33 0 Mode stand by active OUT B H L Vr[V] (at VREF=3.3V) 0.330±5% 0.221±8% 0.109±10% - I0 1 I1 1 Vs 1 VREF 1 CR 1 STB GND GND CR 2 VREF 2 Vs 2 I1 2 I0 2 I0 L H L H I1 L L H H STB L H Shindengen Electric Mfg.Co.Ltd W1002 Stepper Motor Driver IC ■Electrical Characteristics MTD2018G Ta=25℃, Vcc=3.3V unless otherwise specified item Logic supply current（2circuit ON） Logic supply current（2circuit OFF） Load supply current（2circuit OFF） Logic supply current(STB) Load supply current(STB) PHA“H”input voltage PHA“L”input voltage PHA“H”input current PHA“L”input current I0,I1“H”input voltage I0,I1“L”input voltage I0,I1“H”input current I0,I1“L”input current STB“H”input voltage STB“L”input voltage Vref input voltage Vref input current Vs input current comparator threshold（100％） comparator threshold（67％） comparator threshold（33％） Upper transistor saturation drop Lower transistor saturation drop Output leak current Upper diode forward drop Lower diode forward drop One Shot OFF time UVLO threshold Thermal shutdown temperature symbol Icc(ON) Icc(OFF) Imm(OFF) Icc(STB) Imm(STB) VPHA H VPHA L IPHA H IPHA L V(I0,I1) H V(I0,I1) L I(I0,I1) H I(I0,I1) L VSTB H VSTB L VREF IREF Is Vs1 Vs2 Vs3 Vce(SAT)H Vce(SAT)L Ir VF H VF L T OFF Vuv TjTSD condition I0=I1=H Vmm=35V,I0=I1=H STB=L Vmm=35V,STB=L MIN TYP 50.0 17.0 5.0 3.5 MAX 62.0 21.0 7.4 4.7 10.0 Vcc 0.6 10.0 -10.0 Vcc 0.6 10.0 -30.0 Vcc 0.6 unit mA mA mA mA μA V V μA μA V V μA μA V V V μA μA V V V V V μA V V μS V ℃ 2.3 GND VPHA =3.3V VPHA =0V Vmm=12V Vmm=12V V(I0,I1)=3.3V V(I0,I1)=0V 2.3 GND 2.3 GND 1.0 VREF=0V Vs=0V VREF=3.3V,I0=L,I1=L VREF=3.3V,I0=H,I1=L VREF=3.3V,I0=L,I1=H Ic=0.8A Ic=0.8A Vmm=Vce(sus)V,Vout=0V If=0.8A If=0.8A Ct=3300pF,Rt=4.7KΩ -1.0 -1.0 0.314 0.203 0.098 - -1.0 -2.0 0.330 0.221 0.109 1.20 0.70 1.30 1.40 17.1 2.7 170 3.6 10.0 10.0 0.347 0.239 0.120 1.40 1.00 10.0 1.50 1.60 - ■Recommended operation conditions Parameter Junction temperature Logic supply Load supply Symbol Tj Vcc Vmm Recommendation -25∼120 3.0∼3.6 7∼27 Unit ℃ V V ■Thermal resistance Symbol θja *1 Rating 58 Unit ℃/W *1 : 50.8×50.8×1mm3 Glass Epoxy Board(FR4),200mm2 Cupper Pattern Shindengen Electric Mfg.Co.Ltd W1002 Stepper Motor Driver IC ■Block diagram / Typical application MTD2018G Vcc Vcc Vmm CPU or GATE ARRAY 2 1 PHA1 Vcc1 4 6 3 Vmm1 Vmm2 10 7 OUT2B 9 OUT2A 11 Vcc2 PHA2 OUT1A OUT1B 12 CPU or GATE ARRAY Vcc R1 VREF1 VREF2 1/10 1/10 21 R2 VREF2 16 VREF1 Vr TSD Current Sensor + 120deg 170deg Vr Current Sensor + ONE SHOT UVLO ONE SHOT STB I1 1 I0 1 CR1 Vs1 SENSE1 GND STB GND SENSE2 Vs2 CR2 I0 2 I1 2 23 24 20 Rf A 22 5 18 19 STB signal TAB 8 15 Rf B 17 13 14 CPU or GATE ARRAY Ct A Rt A Cf A Rs A Rs B Cf B Rt B CtB CPU or GATE ARRAY ●Constant chopping current level Ichop = VREF − 0.015 10 Rs ●Recommended component values Symbol Recommended component values Unit Ct Rt Cｆ Rf 3300 4.7 820 1.0 pF kΩ pF kΩ ●ONE SHOT OFF TIME Toff = 1.1CtRt Shindengen Electric Mfg.Co.Ltd W1002 Stepper Motor Driver IC ■Outline Drawing MTD2018G (Unit : mm) Shindengen Electric Mfg.Co.Ltd W1002 Stepper Motor Driver IC MTD2018G ! 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