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L6460 数据表(PDF) 71 Page - STMicroelectronics |
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L6460 数据表(HTML) 71 Page - STMicroelectronics |
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71 / 139 page  L6460 Power bridges Doc ID 17713 Rev 1 71/139 The voltage spikes on Rsense could be filtered by selecting an appropriate blanking time on the output of current sense comparator. The Blanking time selection is made by using the StepBlkTime[1:0] bits in the StpCfg1 register. The stepper driver off time could be programmed by means of the StepOffTime[4:0] bits in StpCfg1 register. 32 63 55.6 83.1 33.8° 64 63.4 77.3 39.4° Table 26. Stepper off time StepOffTime[4:0] Off time Unit Typ 00000 2 µs 00001 4 µs 00010 6 µs 00011 8 µs 00100 10 µs 00101 12 µs 00110 14 µs 00111 16 µs 01000 18 µs 01001 20 µs 01010 22 µs 01011 24 µs 01100 26 µs 01101 28 µs 01110 30 µs 01111 32 µs 10000 34 µs 10001 36 µs 10010 38 µs 10011 40 µs Table 25. Internal sequencer (continued) Control mode Typical output current (% of IMAX) Resulting electrical angle Half step Full step (2 phases on) Full step (1 phase on) 1/4 step 1/8 step 1/16 step Phase A (sin) Phase B (cos) Electrical degrees |
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