L297/1 STMicroelectronics, L297/1 Datasheet
L297/1
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L297/1 Summary of contents
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... TWO PHASE BIPOLAR STEPPER MOTOR CONTROL CIRCUIT December 2001 STEPPER MOTOR CONTROLLERS ORDERING NUMBERS : L297/1 (DIP20) this device is that it requires only clock, direction and mode input signals. Since the phase are gen- erated internally the burden on the microprocessor, and the programmer, is greatly reduced. Mounted ...
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... L297 PIN CONNECTION (Top view) BLOCK DIAGRAM (L297/1 - L297D) 2/11 L297/1 L297D ...
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... PIN FUNCTIONS - L297/1 - L297D N NAME 1 SYNC 2 GND 3 HOME INH1 INH2 ENABLE 11 CONTROL SENS 2 14 SENS ref 16 OSC 17 CW/CCW 18 CLOCK FUNCTION Output of the on-chip chopper oscillator. The SYNC connections The SYNC connections of all L297s to be synchronized are connected together and the oscillator components are omitted on all but one ...
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... L297 PIN FUNCTIONS - L297/1 - L297D (continued) N NAME 19 HALF/FULL 20 RESET THERMAL DATA Symbol R Thermal resistance junction-ambient th-j-amb CIRCUIT OPERATION The L297 is intended for use with a dual bridge driver, quad darlington array or discrete power devices in step motor driving applications. It re- ceives step clock, direction and mode signals from ...
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MOTOR DRIVING PHASE SEQUENCES The L297’s translator generates phase sequences for normal drive, wave drive and half step modes. The state sequences and output waveforms for these three modes are shown below. In all cases the translator advances on the ...
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L297 MOTOR DRIVING PHASE SEQUENCES (continued) WAVE DRIVE MODE Wave drive mode (also called "one-phase-on" drive) is selected by a low level on the HALF/FULL input when the translator even numbered state ( 8). ...
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ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter I Leakage current (pin 3) leak V Saturation voltage (pin 3) sat V Comparators offset voltage off (pins 13, 14, 15) I Comparator bias current o (pins 13, 14, 15) V Input reference voltage (pin ...
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L297 APPLICATION INFORMATION TWO PHASE BIPOLAR STEPPER MOTOR CONTROL CIRCUIT This circuit drives bipolar stepper motors with winding currents up to 2A. The diodes are fast 2A types. Figure 2. Figure 3 : Synchronising L297s 8/11 ...
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DIM. MIN. TYP. MAX. MIN. a1 0.254 0.010 B 1.39 1.65 0.055 b 0.45 b1 0.25 D 25.4 E 8.5 e 2.54 e3 22.86 F 7.1 I 3.93 L 3.3 Z 1.34 inch MECHANICAL DATA TYP. MAX. 0.065 0.018 ...
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L297 mm DIM. MIN. TYP. MAX. A 2.35 2.65 0.093 A1 0.1 0.3 0.004 B 0.33 0.51 0.013 C 0.23 0.32 0.009 D 12.6 13 0.496 E 7.4 7.6 0.291 e 1. 10.65 0.394 h 0.25 0.75 0.010 ...
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... No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics ...