LC898240 Advance Information High Efficient Stepper Motor Controller Overview The LC898240 is a current controller IC for a stepper motor, co-working www.onsemi.com 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 PACKAGE PICTURE 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 SQFP48 and configuration can be stored to the companion non-volatile memory. 0.5mm pitch 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 MARKING DIAGRAM 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. 898240 13T Features Unipolar and bipolar motor applicable YMMXXX Supported excitation mode: o Half step 1 o Quarter step o 1/8 step Y: Year o 1/16 step MM: Month o Full step (high efficient function not applicable) XXX: ID SPI interface for the motor control and setting Interface for the driver control ORDERING INFORMATION Non-volatile memory (E2PROM) o Setting of the controller Ordering Code: LC898240-2H (tray) o Acceleration curve: 9 curves, 440 steps for each LC898240-WH (reel) Recommended Stepper Motor Driver Package SQFP48 LV8726TA (Pb-Free / Halogen Free) LV8736V Shipping (Qty / packing) LV8740V 1250 / Tray STK672-6XXX 1000 / Tape & Reel STK672-4XXX 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. Typical Applications LC898240 LC898240 BLOCK DIAGRAM LC898240 E2PROM HOLD DVDD1 WP SO E CSB E Main Chip AVDD DVDD2 AVSS DVSS CLK RSB TSMO CSB SCK CSB M SI SO M Serial Interface SO STS1 STS0 START ST WSEL3 RSTI WSEL2 RSTO Driver WSEL1 OE Acceleration Control WSEL0 Control FR INTP1 MD2 INTP0 MD1 STP MD0 OUTAI OUTBI Driver Waveform Monitor AMPO ECO Mode Control GAD ADCI VREFI Reference Voltage Source VREFO Figure 1 LC898240 Block Diagram www.onsemi.com 2