PDF LC898240 Data sheet ( Hoja de datos )

Número de pieza	LC898240
Descripción	High Efficient Stepper Motor Controller
Fabricantes	ON Semiconductor
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No Preview Available ! LC898240 Advance Information High Efficient Stepper Motor Controller Overview The LC898240 is a current controller IC for a stepper motor, co-working with a conventional driver. It provides additional functions to a stepper motor control system. The drive current of a motor coil is adopted for the motor load, so that minimize the waste of power. By this current control, the stepper motor moves smoothly. And, it gives higher efficiency power consumption, lower acoustic noise, lower vibration and lower heat generation. The LC898240 also provides speed acceleration profile control function and step-out detection/prevention. These functions can be configured by the registers through an SPI serial port interface flexibly. The preset parameters and configuration can be stored to the companion non-volatile memory. The LC898240 consists of the monitor inputs from motor terminal, serial port inter face, the step control signal inputs from a microprocessor and the outputs to a stepper motor driver. The topology of a microprocessor, a stepper motor driver and LC898240, can be arranged to match various drivers and system architecture. Thus, it can be used as an interface converter between a microprocessor and a driver with the advanced control functions. Features • Unipolar and bipolar motor applicable • Supported excitation mode: o Half step o Quarter step o 1/8 step o 1/16 step o Full step (high efficient function not applicable) • SPI interface for the motor control and setting • Interface for the driver control • Non-volatile memory (E2PROM) o Setting of the controller o Acceleration curve: 9 curves, 440 steps for each Recommended Stepper Motor Driver • LV8726TA • LV8736V • LV8740V • STK672-6XXX • STK672-4XXX Typical Applications • Multi-Function Printer • Consumer www.onsemi.com PACKAGE PICTURE SQFP48 0.5mm pitch MARKING DIAGRAM 898240 13T YMMXXX 1 Y: Year MM: Month XXX: ID ORDERING INFORMATION Ordering Code: LC898240-2H (tray) LC898240-WH (reel) Package SQFP48 (Pb-Free / Halogen Free) Shipping (Qty / packing) 1250 / Tray 1000 / Tape & Reel † For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. http://www.onsemi.com/pub_link/Collateral/BRD8011-D.PDF This document contains information on a new product. Specifications and information herein are subject to change without notice. © Semiconductor Components Industries, LLC, 2016 April 2016- Rev. P1 1 Publication Order Number: LC898240/D 1 page PIN DESCRIPTION LC898240 1. HOLD Hold E2PROM. It must be connected to DVDD1. For more detail, see the E2PROM datasheet. 2. OE Output Enable For IO port control mode: - bit OERST = 0: OE acts as an input. - bit OERST = 1: OE acts as an output with respect to the pin ST transparently. For register control mode: - OE outputs the value of the bit OE_REG. 3. RSTO Driver Reset Output To force synchronization of the step position with the driver, the driver reset pulse is output once an electrical cycle, while the bit RSTAD is set 1. For IO port control mode: - RSTO outputs with respect to the pin RSTI transparently. For register control mode: - RSTO outputs the value of the bit RST_REG. 4. FR Rotation Direction For IO port control mode: - Input For register control mode: - FR outputs the value of the bit FR_REG. 5. STP Step Pulse Output 6. DVSS Digital Ground 7. DVDD1 Power Supply for the E2PROM and the Digital Portion of the Main Chip 8. RSTI Driver Reset Input for IO Port Control Mode For register control mode, it is ignored. 9. SO_M and 12. SO_E E2PROM output. They must be connected on a board. 10. CSB_M and 11. CSB_E E2PROM chip select pins. They must be connected on a board. 13. GAD High Efficient Current Control Mode The adaptive motor current control mode is enabled by GAD = H or the bit GAD_REG = 1. 14. RSB System Reset Input LC898240 is reset by RSB = L. After the reset is released, it will start the E2PROM data download to the registers. 15. CLK Clock Input Frequency range is from 840kHz through 10MHz 16. TSMOD Test Mode It must be connected to DVSS or open. 17. VREFI Reference Voltage Input It must be connected to AVDD. 18. VREFO Current Control Reference Voltage Output 19. ADCI ADC Input 20. AVSS Ground of the Analog Portion 21. AVDD Power Supply for the Analog Portion 22. AMPO Amplifier Output 23. OUTAI and 24. OUTBI Motor Signal Input 25. WP Write Protection of E2PROM 26. NC, 32. NC and 35. NC No Connection 27. INTP1 and 28. INTP0 Interpolation Setting for the Acceleration Curve For IO port control mode: - INTP[1:0] = 0h: not interpolation - INTP[1:0] = 1h: interpolate 1 point between the steps based on E2PROM data - INTP[1:0] = 2h: interpolate 3 point between the steps based on E2PROM data - INTP[1:0] = 3h: interpolate 7 point between the steps based on E2PROM data For register control mode, it is ignored. www.onsemi.com 5 5 Page LC898240 WSEL acceleration curve selection (R/W) Address Default Bit7 Bit6 Bit5 Bit4 0002h 00h - - - It is effective during the register control mode (AIFSEL = 1). WSEL_REG[3:0] = 0h: the acceleration curve #0 WSEL_REG[3:0] = 1h: the acceleration curve #1 WSEL_REG[3:0] = 2h: the acceleration curve #2 WSEL_REG[3:0] = 3h: the acceleration curve #3 WSEL_REG[3:0] = 4h: the acceleration curve #4 WSEL_REG[3:0] = 5h: the acceleration curve #5 WSEL_REG[3:0] = 6h: the acceleration curve #6 WSEL_REG[3:0] = 7h: the acceleration curve #7 WSEL_REG[3:0] = 8h: the acceleration curve #8 WSEL_REG[3:0] = 9h - Fh: N.A. - Bit3 Bit2 Bit1 Bit0 WSEL_REG[3:0] INTP interpolation setting between steps (R/W) Address Default Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 0003h 00h - - - - - It is effective during the register control mode (AIFSEL = 1). INTP_REG[1:0] = 0h: not interpolation INTP_REG[1:0] = 1h: interpolate 1 point between the steps based on E2PROM data INTP_REG[1:0] = 2h: interpolate 3 point between the steps based on E2PROM data INTP_REG[1:0] = 3h: interpolate 7 point between the steps based on E2PROM data - Bit1 Bit0 INTP_REG[1:0] DSKIP skip setting at deceleration (R/W) Address Default Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 0004h 00h - - - - - - DSKIP[1:0] The number of skip of the acceleration curve data for deceleration DSKIP = 0: no skip DSKIP = 1: 1 point skip DSKIP = 2: 2 points skip DSKIP = 3: 3 points skip SETST wait time for acceleration R/W Address Default Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 0005h 00h Waiting time for acceleration �� = �� × ��[7: 0] Where, ��: waiting time [s] ��: initial acceleration pulse width [s] SETST[7:0] SETED wait time for stop R/W Address Default Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 0006h 00h Waiting time for stop �� = �� × ��[7: 0] Where, ��: waiting time [s] ��: initial acceleration pulse width [s] SETED[7:0] STMODEconstant speed period programming mode selection (R/W) Address Default Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 0007h 00h - - - - - - - STMODE STMODE = 0: continue rotation at the constant speed after the acceleration until START = 0 STMODE = 1: rotate at the constant speed after the acceleration for the number of steps which is set in the register STCNT, followed by automatic deceleration and stop START must be set 0 after the motor stops. www.onsemi.com 11 11 Page

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