Stepper Motor Driver IC MTD Series MTD2038G DMOS Microstepping PWM Motor Driver Features ●Dual full bridge for a bipolar stepper motor driver ●Load supply voltage 40V , Output current 1.0A ●Constant current control (Fixed frequency PWM control) ●2-bit selectable current level (Full step/Half step/Quarter step) ●Stand-by function ●Thermal shutdown with hysteresis ●Under voltage lock out function ●Surface mount package with heat sink(HSOP24) HSOP24 ■Absolute maxmum ratings / Ta=25℃ Parameter Symbol Rating Unit VREGOutput current IREG 12 mA Logic input VLOGIC 0∼6 V Reference input Vｒ 0∼7 V Load supply Vmm 40 V Output current IOUT 1.0 A Power dissipation PD *1 2.1 W Storage temperature range Tstg -40∼150 ℃ Maximum Junction temperature Tj 150 ℃ *1 : 50.8×50.8×1mm3 Glass Epoxy Board(FR4),200mm2 Cupper Pattern ■Pin Assignment MTD2038G I0 A PHA A Vmm A OUT A Rs A OUT A 1 2 3 4 5 6 TOP VIEW 24 23 22 21 20 19 PG (TAB) OUT B Rs B OUT B Vmm B PHA B I0 B I1 A Vr A Vr B TEST DEC VREG PG (TAB) 7 8 9 10 11 12 18 17 16 15 14 13 Shindengen Electric Mfg.Co.Ltd LG Cp C Cp B Cp A STB I1 B W1002 Stepper Motor Driver IC MTD2038G ■Electrical Characteristics Vmm=24V,Ta=25℃ unless otherwise specified Parameter Symbol Condition MIN TYP MAX Unit 22 mA ●Output stage Load supply current（All circuit OFF） Imm(OFF) VI0A=VI1A=VI0B=VI1B=5V - 13 Load supply current（All circuit ON） Imm(ON) VI0A=VI1A=VI0B=VI1B=0V - 13 22 mA Load supply current（Stand-by） Imm(STB) VSTB=5V - - 200 μA Upper MOSFET ON resistance RONH Iout=-0.8A - 1.8 2.0 Ω Lower MOSFET ON resistance RONL Iout=0.8A - 0.8 1.0 Ω Upper MOSFET leakage current IrH Vmm=35V, VOUT=0V - - 100 μA Lower MOSFET leakage current IrL VOUT=35V, VRS=0V - - 100 μA Upper MOSFET reverse voltage VFH IF=0.8A - 1.4 1.6 V Lower MOSFET reverse voltage VFL IF=0.8A VcpA under voltage lock out threshold VcpAUVLO - - 1.1 1.3 V Vmm+3 Vmm+4 Vmm+6 V IREG=500μA 4.85 5.00 5.15 V ●Logic stage VREGoutput voltage VREG IREG=12mA 4.75 - 5.25 V PHA/I0/I1/DEC "H" input voltage VLOGICH - 2.0 - VREG V PHA/I0/I1/DEC "L" input voltage VLOGICL - GND - 0.8 V STB "H" input voltage VSTBH - 2.3 - VREG V STB "L" input voltage VSTBL - GND - 0.8 V PHA/I0/I1 "H" input current IPHA/I0/I1H VPHA/I0/I1=5V - - 10 μA PHA/I0/I1 "L" input current IPHA/I0/I1L VPHA/I0/I1=0V - -20 -50 μA STB "H" input current ISTBH VSTB=5V - 45 90 μA STB "L" input current ISTBL VSTB=0V - - -10 μA DEC "H" input current IDECH VDEC=5V - 75 150 μA DEC "L" input current IDECL VDEC=0V - - -10 μA Vr "H" input current IrefH Vr=4V - 1 10 μA Vr "L" input current IrefL Vr=0V - -1 -10 μA Comparator threshold voltage (100%) Vs1 VI0(AorB)="L", VI1(AorB)="L" 95 100 105 % Comparator threshold voltage (70%) Vs2 VI0(AorB)="H", VI1(AorB)="L" 64 70 76 % Comparator threshold voltage (40%) Vs3 VI0(AorB)="L", VI1(AorB)="H" 36 40 44 % Oscillator frequency fOSC - 20 30 40 kHz Comparator blanking time tb - - 0.65 - μs CpA charging time *1 Tchg Cp1=0.22μF,Cp2=0.01μF,VSTB=5V→0V Thermal shutdown temperature *2 TTSD - - - 1.5 ms 150 170 190 ℃ *1: Charge of a charge pump takes time. Therefore, please take the time more than Tchg from aftre Vcc input or Stand-by release to even before a motor drive start. *2: TTSD is design value. ■Thermal resistance Symbol Rating Unit θja *3 58 ℃/W *3: 50.8×50.8×1mm3 Glass Epoxy Board(FR4),200mm2 Cupper Pattern Shindengen Electric Mfg.Co.Ltd W1002 Stepper Motor Driver IC MTD2038G ■Recommended operation conditions Parameter Symbol Recommendation Unit Junction temperature Tj -25∼120 ℃ Load supply Vmm 15∼35 V Reference voltage Vr 0∼6 V ■Truth table I0 A(B) and I1 A(B) PHA A or B OUT A or B OUT A or B L H H L L L L H H × OFF OFF ×：don't care I0 A(B) I1 A(B) Current Level(％) L L 100 H L 70 L H 40 H H 0 STB *1 Mode L or OPEN ACTIVE H Stand-By DEC *1 Current Decay Mode L or OPEN Slow Decay H Mix Decay(37.5% Fast) *1 built-in pull-down resistance Shindengen Electric Mfg.Co.Ltd W1002 Stepper Motor Driver IC MTD2038G ■Block diagram / Typical application Vmm Cvmm VREG VmmA TSD OUTA OUTA OUTB OUTB VmmB Cp2 CpA CpB UVLO CpC Charge Pump Stand-by PHA A STB PHA B GATE CIRCUIT GATE CIRCUIT CPU or GATE ARRAY Stand-by Decay Vr Cp1 Decay VrA VrB 1/5 Current Sensor Q 2-bit digital current selection I1A R S S 2-bit digital current selection Oscillator DEC RsA LG PG(TAB) RsB Rs CPU or GATE ARRAY TEST Rs Vr Q VREG Decay Mix Decay% selection I0A 1/5 . Current Sensor R CPU or GATE ARRAY CVREG OPEN or "H" I0B I1B CPU or GATE ARRAY ●Recommended component values Symbol Recommended component values Unit Cp1 0.22 μF Cp2 0.01 μF CVREG 0.1 μF Rs 0.68 Ω Cvmm *1 47 μF *1： It recommend the electrolytic capacitor for the noise absorption connect near IC to Load supply. ●Constant chopping current level Ichop = Ichop Vr 5×Rs Output current 0A Shindengen Electric Mfg.Co.Ltd W1002 Stepper Motor Driver IC MTD2038G ■Outline Drawing (Unit : mm) Shindengen Electric Mfg.Co.Ltd W1002 Stepper Motor Driver IC ! ! MTD2038G 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. 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