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| 2-Phase Excitation SLA7022MU/SLA7029M/SMA7022MU/SMA7029M 2-Phase Stepper Motor Unipolar Driver ICs sAbsolute Maximum Ratings Parameter Motor supply voltage FET Drain-Source voltage Control supply voltage TTL input voltage Reference voltage Output current Power dissipation Channel temperature Storage temperature Symbol VCC VDSS VS VIN VREF IO PD1 PD2 Tch Tstg Ratings SLA7022MU SLA7029M 46 100 46 7 2 1 1.5 4.5 (Without Heatsink) 35 (TC=25C) +150 -40 to +150 1 1.5 4.0 (Without Heatsink) 28(TC=25C) SMA7022MU SMA7029M (Ta=25C) Units V V V V V A W W C C sElectrical Characteristics Ratings Parameter Symbol IS Condition VS VDSS Condition VDS Condition IDSS Condition VSD Condition IIH Condition IIL Condition VIH Condition VIL Condition VIH Condition VIL Condition Tr Condition Tstg Condition Tf Condition min Control supply current Control supply voltage FET Drain-Source voltage FET ON voltage FET drain leakage current SLA7022MU typ max 10 15 VS=44V 10 24 44 100 VS=44V, IDSS=250 A 0.85 ID=1A, VS=14V 4 VDSS=100V, VS=44V 1.2 ID=1A 40 VIH=2.4V, VS=44V -0.8 VIL=0.4V, VS=44V 2 ID=1A 0.8 VDSS=100V 2 VDSS=100V 0.8 ID=1A 0.5 VS=24V, ID=0.8A 0.7 VS=24V, ID=0.8A 0.1 VS=24V, ID=0.8A min SLA7029M typ max 10 15 VS=44V 24 44 min SMA7022MU typ max 10 15 VS=44V 10 24 44 100 VS=44V, IDSS=250 A 0.85 ID=1A, VS=14V 4 VDSS=100V, VS=44V 1.2 ID=1A 40 VIH=2.4V, VS=44V -0.8 VIL=0.4V, VS=44V 2 ID=1A 0.8 VDSS=100V 2 VDSS=100V 0.8 ID=1A 0.5 VS=24V, ID=0.8A 0.7 VS=24V, ID=0.8A 0.1 VS=24V, ID=0.8A min SMA7029M typ max 10 15 VS=44V 10 24 44 100 VS=44V, IDSS=250 A 0.6 ID=1A, VS=14V 4 VDSS=100V, VS=44V 1.1 ID=1A 40 VIH=2.4V, VS=44V -0.8 VIL=0.4V, VS=44V 2 ID=1A 0.8 VDSS=100V 2 VDSS=100V 0.8 ID=1A 0.5 VS=24V, ID=1A 0.7 VS=24V, ID=1A 0.1 VS=24V, ID=1A (Ta=25C) Units mA V V V mA V FET diode forward voltage TTL input current TTL input voltage (Active High) TTL input voltage (Active Low) Switching time 10 100 VS=44V, IDSS=250 A 0.6 ID=1A, VS=14V 4 VDSS=100V, VS=44V 1.1 ID=1A 40 VIH=2.4V, VS=44V -0.8 VIL=0.4V, VS=44V 2 ID=1A 0.8 VDSS=100V 2 VDSS=100V 0.8 ID=1A 0.5 VS=24V, ID=1A 0.7 VS=24V, ID=1A 0.1 VS=24V, ID=1A DC characteristics A mA V V AC characteristics s SLA7022MU/SLA7029M/SMA7022MU/SMA7029M 5 2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation) SLA7022MU/SLA7029M/SMA7022MU/SMA7029M sInternal Block Diagram INA INB 6 1 5 VS 8 14 10 15 1, 6, 10, 15pin Description of pins Reg Reg + - + - + - + - 1pin 6pin 10pin 15pin Excitation input Active H Active L OUT A OUT A OUT A OUT A OUT B OUT B OUT B OUT B GNDA GNDB REFA REFB RSA 7 2 3 4 12 13 11 RSB 9 TDA sDiagram of Standard External Circuit (Recommended Circuit Constants) TDB VCC (46V max) + Excitation signal time chart 2-phase excitation clock INA INB 0 H L 1 H H 2 L H 3 L L 0 H L 1 H H 1-2 phase excitation Vb (5V) 8 VS 1 6 10 15 INA 2 11 C1 C2 TdA TdB RSA REFA REFB RSB 7 3 13 9 C3 Rs Open collector C4 Rs GA 4 5 INA r3 r4 r1 INB GB 12 14 INB clock INA tdA INB tdB 0 H L L L 1 H L L H 2 H L H L 3 H H H L 4 L L H L 5 L L H H 6 L L L L 7 L H L L 0 H L L L 1 H L L H 23 HH LH HH LL r2 q tdA and tdB are signals before the inverter stage. 510 100 (VR) 47k 47k 2.4k 2.4k 330 to 500pF 330 to 500pF 2200pF 2200pF 1.8 typ(7022MU) (1 to 2W) 1 typ(7029M) r1 : r2 : r3 : r4 : r5 : r6 : C1 : C2 : C3 : C4 : Rs : r5 r6 tdA tdB 6 SLA7022MU/SLA7029M/SMA7022MU/SMA7029M 2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation) SLA7022MU/SLA7029M/SMA7022MU/SMA7029M sExternal Dimensions SLA7022MU/SLA7029M (Unit: mm) 3.20.15 310.2 24.40.2 16.40.2 3.20.15x3.8 4.80.2 1.70.1 Epoxy resin package 16 0.2 13 0.2 9.9 0.2 6.70.5 R-End 0.65 -0.1 +0.2 9.7 -0.5 +1 1.60.6 1.15 -0.1 14xP2.030.7=28.421.0 31.30.2 +0.2 0.55 -0.1 40.7 +0.2 1.15 -0.1 14xP2.030.4=28.420.8 +0.2 2.20.4 6.30.6 7.50.6 1 2 3 * * * * * * * 15 12 3 * * * * * * * 15 Forming No. No.853 Forming No. No.855 sExternal Dimensions SMA7022MU/SMA7029MA 0.55 -0.1 (3) +0.2 0.65 -0.1 +0.2 30.6 2.450.2 4.60.6 Part No. Lot No. (Unit: mm) Epoxy resin package 310.2 10.20.2 30 40.2 2.50.2 3 0.6 1.20.1 (5.9) (7.5) 1.6 0.6 0.620.1 1.160.15 P2.030.1x14=28.42 12 3 * * * * * * * 15 1 2 3 * * * * * * * 15 (4.6) +0.2 0.55 -0.1 8.5max Lot No. Part No. 1.450.15 6.7 0.5 (9.7) +0.2 0.65 -0.1 1.16 +0.2 -0.1 +0.2 0.55 -0.1 40.7 P2.030.1x14=28.42 31.3 +0.2 Forming No. No.1054 (3) Forming No. No.1055 SLA7022MU/SLA7029M/SMA7022MU/SMA7029M 7 2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation) SLA7022MU/SLA7029M/SMA7022MU/SMA7029M Application Notes sDetermining the Output Current Fig. 1 shows the waveform of the output current (motor coil current). The method of determining the peak value of the output current (IO) based on this waveform is shown below. (Parameters for determining the output current IO) Vb: Reference supply voltage r1,r2: Voltage-divider resistors for the reference supply voltage RS: Current sense resistor (1) Normal rotation mode IO is determined as follows when current flows at the maximum level during motor rotation. (See Fig.2.) Vb ................................................................ r2 (1) IO * r1+r2 RS (2) Power down mode The circuit in Fig.3 (rx and Tr) is added in order to decrease the coil current. IO is then determined as follows. IOPD 1+ 1 r1(r2+rX) r2 * rX * Fig. 1 Waveform of coil current (Phase A excitation ON) IO Phase A 0 Phase A Fig. 2 Normal mode Vb(5V) r1 r5 r2 C3 3,(13) 7,(9) RS r6 Vb ......................................................... (2) RS Equation (2) can be modified to obtain equation to determine rx. 1 rX= 1 1 Vb -1 - r1 Rs * IOPD r2 Fig. 4 and 5 show the graphs of equations (1) and (2) respectively. Fig. 3 Power down mode Vb(5V) r6 r1 r5 rx Power down signal Tr RS r2 C3 7,(9) 3,(13) Fig. 4 Output current IO vs. Current sense resistor RS 4 Fig. 5 Output current IOPD vs. Variable current sense resistor rx 2.0 2 r2 * Vb r1+r2 RS r1=510 r2=100 rx= Vb=5V IO= Output current IOPD (A) Output current IO (A) 3 1.5 RS =0.5 1 * Vb r1(r2+rX) RS 1+ r2 * rX r1=510 r2=100 Vb=5V IOPD= 1.0 RS =0.8 RS =1 1 0.5 0 0 1 2 3 4 00 200 400 600 800 1000 1200 Current sense resistor RS () Variable current sense resistor rX () (NOTE) Ringing noise is produced in the current sense resistor RS when the MOSFET is switched ON and OFF by chopping. This noise is also generated in feedback signals from RS which may therefore cause the comparator to malfunction. To prevent chopping malfunctions, r5(r6) and C3(C4) are added to act as a noise filter. However, when the values of these constants are increased, the response from RS to the comparator becomes slow. Hence the value of the output current IO is somewhat higher than the calculated value. 8 SLA7022MU/SLA7029M/SMA7022MU/SMA7029M 2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation) SLA7022MU/SLA7029M/SMA7022MU/SMA7029M sDetermining the chopper frequency Determining TOFF The SLA7000M and SMA7000M series are self-excited choppers. The chopping OFF time TOFF is fixed by r3/C1 and r4/C2 connected to terminal Td. TOFF can be calculated using the following formula: 2 2 TOFF-r3 * C1rn (1- =-r4 * C2rn (1- ) Vb Vb The circuit constants and the TOFF value shown below are recommended. TOFF = 12s at r3=47k, C1=500pF, Vb=5V Fig. 6 Chopper frequency vs. Motor coil resistance 60 15 Chopping frequency f (kHz) 1.0 50 ON time TON ( s) 40 30 VC C 20 =2 4V 25 30 35 40 20 10 0 VCC V =36 r3 = r4 = 47k 500pF C1 C2 TOFF =12s RS =1 Lm =1~3ms Rm 0 2 46 8 10 12 14 16 Motor coil resistance Rm () sChopper frequency vs. Supply voltage sChopper frequency vs. Output current 50 50 40 40 f (kHz) 20 Motor : 23LM-C202 IO = 0.8A at VCC=24V RS=1 f (kHz) 30 30 20 Motor : 23LM-C202 VCC=24V RS=1 10 10 0 0 10 20 30 40 50 0 0 0.2 0.4 0.6 0.8 VCC (V) IO (A) SLA7022MU/SLA7029M/SMA7022MU/SMA7029M 9 2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation) SLA7022MU/SLA7029M/SMA7022MU/SMA7029M sThermal Design An outline of the method for calculating heat dissipation is shown below. (1)Obtain the value of PH that corresponds to the motor coil current IO from Fig. 7 "Heat dissipation per phase PH vs. Output current IO." Fig. 7 Heat dissipation per phase PH vs. Output current IO SLA7022MU, ASMA7022MU 1.2 (2) The power dissipation Pdiss is obtained using the following formula. 2-phase excitation: Pdiss 2PH+0.015xVS (W) 1-2 phase excitation: Pdiss 3 PH+0.015xVS (W) 2 (3) Obtain the temperature rise that corresponds to the calculated value of Pdiss from Fig. 8 "Temperature rise." SLA7029M, SMA7029M 1.2 Heat dissipation per phase PH (W) Heat dissipation per phase PH (W) 1 1.0 0.8 0.6 0.4 0.2 0 V =44 24V 15 0.8 VC 0.6 C =4 4V 36 V 36 V 24 V 1 5V Motor : 23LM-C202 Holding mode VCC Motor : 23LM-C004 V Holding mode 0.4 0.2 0 0 0.2 0.4 0.6 0.8 1.0 0 0.2 Output current IO (A) 0.4 0.6 0.8 Output current IO (A) 1.0 Fig. 8 Temperature rise 150 SLA7000M series 150 SMA7000M series T j T j 100 Tj-a TC-a (C) Tj-a (C) TC-a C T 100 Natural cooling Without heatsink C T Natural cooling Without heatsink 50 50 0 0 1 2 3 Total Power (W) 4 5 0 0 1 2 3 Total Power (W) 4 Thermal characteristics SLA7022MU 35 30 SLA7029M Without heatsink Natural cooling Case temperature rise TC-a (C) 30 25 20 15 10 5 0 200 Case temperature rise TC-a (C) Without heatsink Natural cooling 25 20 TC ( 4 pin) Motor : PH265-01B Motor current IO=0.8A Ta=25C VCC=24V, VS=24V 2-phase excitation TC ( 4 pin) 15 10 5 0 200 Motor : PH265-01B Motor current IO=0.8A Ta=25C VCC=24V, VS=24V 2-phase excitation 500 1K 500 1K Response frequency (pps) Response frequency (pps) SMA7022MU 35 30 SMA7029MU Case temperature rise TC-a (C) Without heatsink Natural cooling 25 20 Case temperature rise TC-a (C) 30 25 20 15 10 5 0 200 Without heatsink Natural cooling TC ( 4 pin) Motor : PH265-01B Motor current IO=0.8A Ta=25C VCC=24V, VS=24V 2-phase excitation TC ( 4 pin) 15 10 5 0 Motor : PH265-01B Motor current IO=0.8A Ta=25C VCC=24V, VS=24V 2-phase excitation 500 1K 200 500 1K Response frequency (pps) Response frequency (pps) 10 SLA7022MU/SLA7029M/SMA7022MU/SMA7029M 2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation) SLA7022MU/SLA7029M/SMA7022MU/SMA7029M sSupply Voltage VCC vs. Supply Current ICC SLA7022MU, SMA7022MU 500 500 SLA7029M, SMA7029M Supply current ICC (mA) 400 300 Motor : 23LM-C202 1-phase excitation Holding mode IO : Output current IO=1A Supply current ICC (mA) 400 300 200 Motor : 23LM-C004 1-phase excitation Holding mode IO : Output current IO=1A 200 100 0.4A 0.2A 0 10 20 30 40 50 100 0 0 0.5A 0.2A 0 10 20 30 40 50 Supply voltage VCC (V) Supply voltage VCC (V) sTorque Characteristics SLA7022MU, SMA7022MU 2.0 2.0 SLA7029M, SMA7029M Pull-out torque (kg-cm) Pull-out torque (kg-cm) 1.5 1.5 1.0 Motor : PX244-02 Output current IO =0.6A Motor supply voltage VCC =24V 2-phase excitation 1.0 Motor : 23LM-C202 Output current IO =0.8A Motor supply voltage VCC =24V 2-phase excitation 0.5 0.5 0 100 500 1K 5K 0 100 500 1K 5K Response frequency (pps) Response frequency (pps) SLA7022MU/SLA7029M/SMA7022MU/SMA7029M 11 |
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