tailieunhanh - Stepper Motor Controllers

The L297 Stepper Motor Controller IC generates four phase drive signals for two phase bipolar and four phase unipolar step motors in microcomputercontrolled applications. The motor can be driven in half step, normal and wawe drive modes and onchip PWM | Request For Quotation Order the parts you need from our real-time inventory database. Simply complete a request for quotation form with your part information and a sales representative will respond to you with price and availability. Request For Quotation Your free datasheet starts on the next page. More datasheets and data books are available from our homepage http This datasheet has been downloaded from http . 7. L297 STEPPER MOTOR CONTROLLERS NORMAL WAVE DRIVE HALF FULL STEP MODES CLOCKWISE ANTICLOCKWISE DIRECTION SWITCHMODE LOAD CURRENT REGULATION PROGRAMMABLE LOAD CURRENT FEW EXTERNAL COMPONENTS RESET INPUT HOME OUTPUT ENABLE INPUT DIP20 SO20 ORDERING NUMBERS L297 1 DIP20 L297D SO20 DESCRIPTION The L297 Stepper Motor Controller IC generates four phase drive signals for two phase bipolar and four phase unipolar step motors in microcomputer-controlled applications. The motor can be driven in half step normal and wawe drive modes and on-chip PWM chopper circuits permit switch-mode control of the current in the windings. A feature of this device is that it requires only clock direction and mode input signals. Since the phase are generated internally the burden on the microprocessor and the programmer is greatly reduced. Mounted in DIP20 and SO20 packages the L297 can be used with monolithic bridge drives such as the L298N or L293E or with discrete transistors and darlingtons. ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit Vs Supply voltage 10 V Vi Input signals 7 V Ptot Total power dissipation Tamb 70 C 1 W Tstg Tj Storage and junction temperature -40 to 150 C TWO PHASE BIPOLAR STEPPER MOTOR CONTROL CIRCUIT December 2001 1 11 L297 PIN CONNECTION Top view BLOCK DIAGRAM L297 1 - L297D 2 .