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| 2-Phase/1-2 Phase Excitation SLA7032M/SLA7033M 2-Phase Stepper Motor Unipolar Driver ICs sAbsolute Maximum Ratings Parameter Motor supply voltage Control supply voltage FET Drain-Source voltage TTL input voltage SYNC terminal voltage Reference voltage Sense voltage Output current Power dissipation Channel temperature Storage temperature Symbol VCC VS VDSS VIN VSYNC VREF VRS IO PD1 PD2 Tch Tstg Ratings SLA7032M 46 46 100 -0.3 to +7 -0.3 to +7 -0.3 to +7 -5 to +7 1.5 4.5 (Without Heatsink) 35 (Tc = 25C) +150 -40 to +150 3 SLA7033M (Ta=25C) Units V V V V V V A W W C C sElectrical Characteristics Ratings Parameter Symbol min Control supply current Control supply voltage FET Drain-Source voltage FET ON voltage FET diode forward voltage FET drain leakage current IS Condition VS VDSS Condition VDS Condition VSD Condition IDSS SLA7032M typ 10 VS=44V 24 VS=44V, IDSS=250A 0.6 ID=1A, VS=14V 1.1 ISD=1A ISD=3A 250 VDSS=100V, VS=44V 2.0 ID=3A 0.8 VDSS=100V 2.0 VDSS=100V 0.8 ID=3A 1 VS=44V, VI=0 or 5V 4.0 Synchronous chopping mode 0.8 Asynchronous chopping mode 0.1 VS=44V, VYS=5V -0.1 VS=44V, VYS=0V 0 Reference voltage input 4.0 Output FET OFF 1 No synchronous trigger 40 Resistance between GND and REF terminal at synchronous trigger 0.5 VS=24V, ID=1A 0.7 VS=24V, ID=1A 0.1 VS=24V, ID=1A 12 VS=24V 5.5 2.0 V mA V V V ID=3A, VS=14V 2.3 max 15 44 min SLA7033M typ 10 VS=44V 24 VS=44V, IDSS=250A 0.85 Units max 15 44 mA V V V V 10 100 10 100 OUT DC characteristics IN terminal OUT Input current Input voltage SYNC terminal Input current Input current REF terminal Input current Internal resistance Switching time Chopping OFF time 250 Condition VDSS=100V, VS=44V VIH 2.0 Condition ID=1A VIL 0.8 Condition VDSS=100V VIH 2.0 Condition VDSS=100V VIL 0.8 Condition ID=1A II 1 Condition VS=44V, VI=0 or 5V VSYNC 4.0 Condition Synchronous chopping mode VSYNC 0.8 Condition Asynchronous chopping mode ISYNC 0.1 Condition VS=44V, VYS=5V ISYNC -0.1 Condition VS=44V, VYS=0V VREF 0 2.0 Condition Reference voltage input VREF 4.0 5.5 Condition Output FET OFF IREF 1 Condition No synchronous trigger RREF 40 Condition Resistance between GND and REF terminal at synchronous trigger Tr 0.5 Condition VS=24V, ID=1A Tstg 0.7 Condition VS=24V, ID=1A Tf 0.1 Condition VS=24V, ID=1A TOFF 12 Condition VS=24V A A A AC characteristics s s 28 SLA7032M/SLA7033M 2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation) SLA7032M/SLA7033M sInternal Block Diagram 1 8 6 5 7 12 17 16 11 18 Vs A Vs B IN B IN A IN A IN B 1, 8, 11, 18pin Description of pins Reg. Oscillator MOSFET gate drive circuit Synchronous chopping circuit Reg. Chopping blanking timer (5 s typ) Oscillator MOSFET gate drive circuit Synchronous chopping circuit Chopping blanking timer (5 s typ) Chopping OFF timer (12 s typ) + - + - Chopping OFF timer (12 s typ) 1pin 8pin 11pin 18pin Excitation input Active H Active L OUT A OUT A OUT A OUT A OUT B OUT B OUT B OUT B SYNC A SYNC B REF A REF B Rs A 9 2 4 3 14 15 13 10 sDiagram of Standard External Circuit (Recommended Circuit Constants) Active High Vcc (46Vmax) Excitation signal time chart 2-phase excitation clock INA INA INB INB INA INA INB INB Active High Rs B GA GB + 7 VsA 2 Vb (5V) 12 VsB 8 1 18 11 OUTA OUTA OUTB OUTB INA 6 0 H L H L 1 L H H L 2 L H L H 3 H L L H 0 H L H L 1 L H H L r1 : 4k r2 : 1k(VR) Rs : 1 typ(7032M) (1 to 2W) 0.68 typ(7033M) SYNC A SLA7032M SLA7033M SYNC B INA 5 INB 17 INB 16 13 1-2 phase excitation r1 RsA 9 Rs r2 REFA REFB RsB 3 14 10 Rs GA 4 GB 15 clock INA INA INB INB 0 H L L L 1 H L H L 2 L L H L 3 L H H L 4 L H L L 5 L H L H 6 L L L H 7 H L L H 0 H L L L 1 H L H L 2 L L H L 3 L H H L Active Low Vcc (46Vmax) Excitation signal time chart 2-phase excitation clock INA INA INB INB INA INA INB INB Active Low + 7 VsA 2 Vb (5V) 12 VsB 8 1 18 11 OUTA OUTA OUTB OUTB INA 6 0 L H L H 1 H L L H 2 H L H L 3 L H H L 0 L H L H 1 H L L H r1 : 4k r2 : 1k(VR) Rs : 1 typ(7032M) (1 to 2W) 0.68 typ(7033M) SYNC A SLA7032M SLA7033M SYNC B INA 5 INB 17 INB 16 13 1-2 phase excitation clock INA INA INB INB 0 L H H H 1 L H L H 2 H H L H 3 H L L H 4 H L H H 5 H L H L 6 H H H L 7 L H H L 0 L H H H 1 L H L H 2 H H L H 3 H L L H r1 RsA 9 Rs REFA REFB RsB 3 14 10 Rs GA 4 GB 15 r2 SLA7032M/SLA7033M 29 2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation) SLA7032M/SLA7033M sExternal Dimensions 3.20.15 310.2 24.40.2 16.40.2 (Unit: mm) 3.20.15x3.8 4.80.2 1.70.1 9.9 0.2 6.70.5 R-End 0.65 -0.1 +0.2 9.7 -0.5 +1 1 -0.1 17xP1.680.4=28.561 +0.2 (3) 0.65 -0.1 1 -0.1 0.55 -0.1 40.7 +0.2 17xP1.680.4=28.561 31.30.2 1 2 3 * * * * * * * 18 123 * * * * * * * 18 Forming No. No.871 Forming No. No.872 30 SLA7032M/SLA7033M 0.55 -0.1 1.6 0.6 +0.2 +0.2 +0.2 2.20.6 60.6 7.50.6 3 0.6 Part No. Lot No. 2.450.2 4.6 0.6 3. 4. 5. 16 0.2 13 0.2 2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation) SLA7032M/SLA7033M Application Notes sOutline SLA7032M (SLA7033M) is a stepper motor driver IC developed to reduce the number of external parts required by the conventional SLA7024M (SLA7026M). This IC successfully eliminates the need for some external parts without sacrificing the features of SLA7024M (SLA7026M). The basic function pins are compatible with those of SLA7024M (SLA7026M). the SYNC terminals open because they are for CMOS input. Connect TTL or similar to the SYNC terminals and switch the SYNC terminal level high or low. When the motor is not running, set the TTL signal high (SYNC terminal voltage: 4 V or more) to make chopping synchronous. When the motor is running, set the TTL signal low (SYNC terminal voltage: 0.8 V or less) to make chopping asynchronous. If chopping is set to synchronous at when the motor is running, the motor torque deteriorates before the coil current reaches the set value. If no abnormal noise occurs when the motor is not running, ground the SYNC terminals (TTL not necessary). sNotes on Replacing SLA7024M (SLA7026M) SLA7032M (SLA7033M) is pin-compatible with SLA7024M (SLA7026M). When using the IC on an existing board, the following preparations are necessary: (1) Remove the resistors and capacitors attached for setting the chopping OFF time. (r3, r4, C1, and C2 in the catalog) (2) Remove the resistors and capacitors attached for preventing noise in the detection voltage VRS from causing malfunctioning and short the sections from which the resistors were removed using jumper wires. (r5, r6, C3, and C4 in the catalog) (3) Normally, keep pins 2 and 13 grounded because their functions have changed to synchronous and asynchronous switching (SYNC terminals). For details, see "Circuit for Preventing Abnormal Noise When the Motor Is Not Running (Synchronous circuit)." (Low: asynchronous, High: synchronous) SYNC_A TTL, etc. SYNC_B SLA7032M SLA7033M SYNC voltage : Low Chopping asynchronous SYNC voltage : High Chopping synchronous sCircuit for Preventing Abnormal Noise When the Motor Is Not Running (Synchronous Circuit) A motor may generate abnormal noise when it is not running. This phenomenon is attributable to asynchronous chopping between phases A and B. To prevent the phenomenon, SLA7032M (SLA7033M) contains a synchronous chopping circuit. Do not leave 5V The built-in synchronous chopping circuit superimposes a trigger signal on the REF terminal for synchronization between the two phases. The figure below shows the internal circuit of the REF terminal. Since the VREF varies depending on the values of R1 and R2, determine these values for when the motor is not running within the range where the two phases are synchronized. R1 VREF R2 3 14 REF_A REF_B 40 (typ.) 40 (typ.) VREF waveform VREF 0 To comparator (high impedance) SLA7032M SLA7033M Sync/async switching signal ONE SHOT (tw=2 S) FET A/A gate drive signal ONE SHOT (tw=2 S) FET B/B gate drive signal Synchronous circuit operating waveform VREF Phase A 0 VRS VREF Phase B 0 VRS Synchronous circuit OFF Synchronous circuit ON SLA7032M/SLA7033M 31 2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation) SLA7032M/SLA7033M 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.) IO r2 r1+r2 * Fig. 1 Waveform of coil current (Phase A excitation ON) IO Phase A 0 Phase A Vb ................................................................ (1) RS Fig. 2 Normal mode Vb(5V) r1 3,(14) r2 9,(10) 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 1 1 r1 Vb Rs * IOPD -1 - 1 r2 * Vb ......................................................... (2) RS Equation (2) can be modified to obtain equation to determine rx. rX= Fig. 3 Power down mode Vb(5V) r1 Fig. 4 and 5 show th e graphs of equations (1) and (2) respectively. 3,(14) 9,(10) rX Power down signal Tr r2 Fig. 4 Output current IO vs. Current sense resistor RS Fig. 5 Output current IOPD vs. Variable current sense resistor rx 4 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 () 32 SLA7032M/SLA7033M 2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation) SLA7032M/SLA7033M sThermal Design An outline of the method for calculated heat dissipation is shown below. (1) Obtain the value of PH that corresponds to the motor coil current IO from Fig. 6 "Heat dissipation per phase PH vs. Output current IO." (2) The power dissipation Pdiss is obtained using the following formula. 2-phase excitation: Pdiss 2PH+0.015xVS (W) 3 PH+0.015xVS (W) 2 (3) Obtain the temperature rise that corresponds to the computed value of Pdiss from Fig. 7 "Temperature rise." 1-2 phase excitation: Pdiss Fig. 6 Heat dissipation per phase PH vs. Output current IO SLA7032M 1.2 Heat dissipation per phase PH (W) SLA7033M 4.0 Heat dissipation per phase PH (W) 1.0 0.8 0.6 0.4 0.2 0 44 C= V 24V 1 3.0 =4 4 V VC 1.0 0 0.2 0.4 0.6 0.8 Output current IO (A) 1.0 0 0 1.0 2.0 Output current IO (A) 36 V Motor : 23LM-C004 Holding mode 5V 24 2.0 VC C V 15 V 36 V Motor : 23PM-C503 Holding mode 3.0 Fig. 7 Temperature rise 150 T j 100 Tj-a TC-a (C) C T Natural cooling Without heatsink 50 0 0 1 2 3 Total Power (W) 4 5 Thermal characteristics SLA7032M 30 SLA7033M 50 Case temperature rise TC-a (C) 25 20 Case temperature rise TC-a (C) Without heatsink Natural cooling Without heatsink Natural cooling 40 TC ( 4 pin) 15 10 5 0 200 30 TC( 4 pin) Motor : 23PM-C705 Motor current IO=1.5A Ta=25C VCC=24V, VS=24V 2-phase excitation Motor : PH265-01B Motor current IO=0.8A Ta=25C VCC=24V, VS=24V 2-phase excitation 20 10 500 1K 0 100 500 1K 5K Response frequency (pps) Response frequency (pps) SLA7032M/SLA7033M 33 2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation) SLA7032M/SLA7033M sSupply Voltage VCC vs. Supply Current ICC SLA7032M 500 1.5 SLA7033M Supply current ICC (mA) 400 Supply current ICC (A) 300 Motor : 23LM-C004 1-phase excitation Holding mode IO : Output current IO=1A 1.0 200 Motor : 23PM-C503 1-phase excitation Holding mode IO : Output current IO=3A IO=2A 0.5 100 0 0.5A 0.2A 0 10 20 30 40 50 IO=1A 0 0 10 20 30 40 50 Supply voltage VCC (V) Supply voltage VCC (V) sTorque Characteristics SLA7032M 2.0 6.0 5.0 Pull-out torque (kg-cm) SLA7033M Pull-out torque (kg-cm) 1.5 4.0 3.0 2.0 1.0 1.0 Motor : 23LM-C202 Output current IO =0.8A Motor supply voltage VCC =24V 2-phase excitation Motor : 23PM-C705 Output current IO =2.5A Motor supply voltage VCC =24V 2-phase excitation 0.5 0 100 500 1K 5K 0 100 500 1K 5K 10K Response frequency (pps) Response frequency (pps) 34 SLA7032M/SLA7033M 2-Phase Stepper Motor Unipolar Driver IC (2-Phase/1-2 Phase Excitation) SLA7032M/SLA7033M 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 1.0 VCC (V) IO (A) sNote The excitation input signals of the SLA7032M, SLA7033M can be used as either Active High or Active Low. Note, however, that the corresponding output (OUT) changes depending on the input (IN). Active High Input INA (pin6) INA (pin5) INB (pin17) INB (pin16) Corresponding output OUTA (pin1) OUTA (pin8) OUTB (pin11) OUTB (pin18) Active Low Input INA (pin6) INA (pin5) INB (pin17) INB (pin16) Corresponding output OUTA (pin8) OUTA (pin1) OUTB (pin18) OUTB (pin11) sHandling Precautions The input terminals of this product use C-MOS circuits. Observe the following precautions. q Carefully control the humidity of the room to prevent the buildup of static electricity. Since static electricity is particularly a problem during the winter, be sure to take sufficient precautions. q Take care to make sure that static electricity is not applied to the IC during wiring and assembly. Take precautions such as shorting the terminals of the printed wiring board to ensure that they are at the same electrical potential. SLA7032M/SLA7033M 35 |
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