HIC (DC power input) 3-Phase Stepping Motor Drive IC for Universal Controller PMM3501 Micro step Outline The PMM3501 IC for stepping motor drive is a power hybrid IC (HIC) that consists of an energization mode generation circuit and a switching device to drive 3-phase stepping motors in a single package. It has been developed to facilitate the use of 3-phase stepping motors more easily so that you can easily configure a micro step drive device only with this HIC and a few peripheral parts. Features • • • • • Micro step sine wave drive driver Built-in current detection resistor Adopting MOSFET as the power drive device to reduce heat generation All-in-one package reducing the number of parts of the peripheral circuit 5 energization modes available with an external bit signal Maximum ratings (TC=25˚C) Symbol Condition Rating Unit Source voltage_1 Item VCC1max VCC2=0V 37 V Source voltage_2 VCC2max Without signal 7 V Input voltage Vinmax Logic input terminal 7 V Phase current IOmax VCC2=5V,Clock ≧ 100Hz 6 A Board temperature during operation TCmax No condensation at low temperature 0~+105 ˚C Joint temperature Tjmax ______ +150 ˚C Conservation temperature Tstg ______ –40~+125 ˚C Recommended operating conditions (Ta=15˚C) Item 35 Condition Rating Source voltage_1 VCC1 Symbol With signal 16~30 V Source voltage_1 VCC2 Without signal 5.0±5% V Input voltage VIH ______ 0~VCC2 V Phase current_1 IO1 Without heat sink 1.7 A Phase current_2 IO2 TC=105˚C,Clock ≧ 100Hz 4.4 A DC~50 kHz 60 V Clock frequency Clock Phase driver withstand voltage VDSS Pin 11 input frequency (pulse duty: 50%) ID=10mA(TC=25˚C) Unit External Figures (unit: mm) VCC1B VCC1C 78 – 9 70 PMM3501 UO WO VO Vz VCC1A GND2 Vref Clock Mode A Mode B Hold CW/CCW Enable Reset Mode C GND1 MOI VCC2 PMM3501 21.5 +0.2 2–ø3.6–0.1 28 4 1 28.5 Name 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 44 Pin No. PMM3101 Pin connection +0.2 0.5–0.05 2 – (8) UI VI WI 2.9 +0.2 0.4–0.05 27x2=54 – P.GNDA P.GNDB Electrical characteristics (TC=25˚C, VCC1=24V, VCC2=5V) Rating Item VCC2 source current Symbol Condition Unit Min Standard – 6.1 Max ICCO Enable="L" Ioe Each phase R/L=2Ω/6mH 2W2–3phase energization FET diode forward voltage Vdf If=1A(RL=23Ω) – 1.0 1.6 V Output saturation voltage Vsat RL=23Ω – 0.30 0.40 V mA Effective output current 0.92 1.03 12 1.14 mA Arms Output leak current IOL RL=23Ω – – 0.1 "H" level input voltage VIH Pins 11 to 18 4.0 – – V "L" level input voltage VIL Pins 11 to 18 – – 1.0 V IIL Pins 11 to 18 = GND level 115 250 0 – 440 625 Input current Vref input voltage Vref input current Pull-up resistance:20kΩ VrH Ir Pin 10 Pin 10 = 2.5 V Internal resistance:4kΩ 550 µA VCC2/2 V 810 µA "H" level MOI output voltage VOH Pins 20 – 19 = 820kΩ 2.5 – – V "L" level MOI output voltage VOL Pins 21 – 20 = 1.6kΩ – – 0.4 V PWM frequency FC – 23 31 39 kHz 36 HIC (DC power input) Function of each terminal Function of each terminal function Vref Input condition for operation Motor current setting input Clock Pulse input for motor drive Hold Pause input – Mode C = "H": Rising edge operation Mode C = "L": Rising edge and falling edge operation Hold = "L" level CW/CCW Motor rotational direction setting input Enable Power off input Reset System reset MOI Rotation monitor output "H" level = CW rotation "L" level = CCW rotation Enable = "L" level Reset = "L" level "H" level output once for each phase current period • The MOI output differs from the phase origin monitor output. Energization mode table Input Mode A 1 step angle condition Energization mode Basic step division Mode B Mode C L L H 2EX 1.2 1 L H H 2–3EX 0.6 2 H L H W2–3EX 0.3 4 H H H 2W2–3EX 0.15 8 H H L 4W2–3EX 0.075 16 (degree) • When Mode C = "L," 1 step operation is performed for each rising edge and falling edge of the Clock pulse. If the duty ratio of the drive pulse moves out of the adjustment significantly by 50%, operation becomes unstable. Example of Application Circuit Vcc2(5V) PMM3501 Clock Mode A Mode B Mode C Hold CW / CCW Enable Reset MOI + C4 R1 21 11 12 13 18 7 14 15 16 17 20 4 23 3 6 24 2 5 25 1 + C2 16~30 + Vref R2 Vcc1 8 1 2 C3 10 19 Stepping motor C1 9 27 28 P.GND Recommended circuit part constants C1 C2 C3 C4 470µF 6.8µF 0.1µF 10µF For the R1 and R2 constants, determine the Vref voltage according to the following equation. Vref (V) = motor current adjustment value (A/phase) x 0.41 Notice that 100Ω is recommended for R2 due to the configuration of the internal circuit of the PMM3101. Place the GND side of the source by-pass capacitor of VCC1 (C1) as close to pins 27 and 28 as possible to reduce noise. 37