ZHCSIK4B January 2017 – November 2018 DRV8886AT
PRODUCTION DATA.
DRV8886AT 器件中的內(nèi)置分度器邏輯支持多種不同的步進(jìn)模式。M1 和 M0 引腳用于配置步進(jìn)模式，如 Table 2 所示。
| M1 | M0 | 步進(jìn)模式 |
|---|---|---|
| 0 | 0 | 全步進(jìn)（兩相勵磁），電流為 71% |
| 0 | 1 | 1/16 步進(jìn) |
| 1 | 0 | 1/2 步進(jìn) |
| 1 | 1 | 1/4 步進(jìn) |
| 0 | Z | 1/8 步進(jìn) |
| 1 | Z | 非循環(huán) 1/2 步進(jìn) |
Table 3 顯示了全步進(jìn)至 1/16 步進(jìn)運(yùn)行的相對電流和步進(jìn)方向。AOUT 電流是電角的正弦，BOUT 電流是電角的余弦。正電流是指進(jìn)行驅(qū)動時(shí)從 xOUT1 引腳流向 xOUT2 引腳的電流。
在 STEP 輸入的每個(gè)上升沿，分度器移動到表格中的下一個(gè)狀態(tài)。方向按照 DIR 引腳邏輯高電平進(jìn)行顯示。如果 DIR 引腳為邏輯低電平，則順序相反。
上電或退出休眠模式時(shí)，請保持 STEP 引腳邏輯低電平，否則分度器前進(jìn)一步。
NOTE
在步進(jìn)時(shí)，如果步進(jìn)模式從全步、1/2、1/4、1/8 或 1/16 變?yōu)槿健?/2、1/4、1/8 或 1/16，則分度器在 STEP 上升沿情況下前進(jìn)到下一個(gè)有效狀態(tài)，以便實(shí)現(xiàn)新的步進(jìn)模式設(shè)置。如果步進(jìn)模式改變自/至非循環(huán) 1/2 步進(jìn)，則分度器立即進(jìn)入該模式的有效狀態(tài)。
初始狀態(tài)下的電角度為 45°。系統(tǒng)在上電后、退出邏輯欠壓鎖定后或退出休眠模式后進(jìn)入該狀態(tài)。Table 3 以紅色列出了初始狀態(tài)。
| 全步 | 1/2 步進(jìn) | 1/4 步進(jìn) | 1/8 步進(jìn) | 1/16 步進(jìn) | 電角（度） | AOUT 電流（滿量程中所占百分比） | BOUT 電流（滿量程中所占百分比） |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 1 | 0.000° | 0% | 100% | |
| 2 | 5.625° | 10% | 100% | ||||
| 2 | 3 | 11.250° | 20% | 98% | |||
| 4 | 16.875° | 29% | 96% | ||||
| 2 | 3 | 5 | 22.500° | 38% | 92% | ||
| 6 | 28.125° | 47% | 88% | ||||
| 4 | 7 | 33.750° | 56% | 83% | |||
| 8 | 39.375° | 63% | 77% | ||||
| 1 | 2 | 3 | 5 | 9 | 45.000° | 71% | 71% |
| 10 | 50.625° | 77% | 63% | ||||
| 6 | 11 | 56.250° | 83% | 56% | |||
| 12 | 61.875° | 88% | 47% | ||||
| 4 | 7 | 13 | 67.500° | 92% | 38% | ||
| 14 | 73.125° | 96% | 29% | ||||
| 8 | 15 | 78.750° | 98% | 20% | |||
| 16 | 84.375° | 100% | 10% | ||||
| 3 | 5 | 9 | 17 | 90.000° | 100% | 0% | |
| 18 | 95.625° | 100% | -10% | ||||
| 10 | 19 | 101.250° | 98% | -20% | |||
| 20 | 106.875° | 96% | –29% | ||||
| 6 | 11 | 21 | 112.500° | 92% | –38% | ||
| 22 | 118.125° | 88% | –47% | ||||
| 12 | 23 | 123.750° | 83% | –56% | |||
| 24 | 129.375° | 77% | –63% | ||||
| 2 | 4 | 7 | 13 | 25 | 135.000° | 71% | –71% |
| 26 | 140.625° | 63% | –77% | ||||
| 14 | 27 | 146.250° | 56% | –83% | |||
| 28 | 151.875° | 47% | –88% | ||||
| 8 | 15 | 29 | 157.500° | 38% | –92% | ||
| 30 | 163.125° | 29% | –96% | ||||
| 16 | 31 | 168.750° | 20% | –98% | |||
| 32 | 174.375° | 10% | –100% | ||||
| 5 | 9 | 17 | 33 | 180.000° | 0% | –100% | |
| 34 | 185.625° | -10% | –100% | ||||
| 18 | 35 | 191.250° | -20% | –98% | |||
| 36 | 196.875° | –29% | –96% | ||||
| 10 | 19 | 37 | 202.500° | –38% | –92% | ||
| 38 | 208.125° | –47% | –88% | ||||
| 20 | 39 | 213.750° | –56% | –83% | |||
| 40 | 219.375° | –63% | –77% | ||||
| 3 | 6 | 11 | 21 | 41 | 225.000° | –71% | –71% |
| 42 | 230.625° | –77% | –63% | ||||
| 22 | 43 | 236.250° | –83% | –56% | |||
| 44 | 241.875° | –88% | –47% | ||||
| 12 | 23 | 45 | 247.500° | –92% | –38% | ||
| 46 | 253.125° | –96% | –29% | ||||
| 24 | 47 | 258.750° | –98% | -20% | |||
| 48 | 264.375° | –100% | -10% | ||||
| 7 | 13 | 25 | 49 | 270.000° | –100% | 0% | |
| 50 | 275.625° | –100% | 10% | ||||
| 26 | 51 | 281.250° | –98% | 20% | |||
| 52 | 286.875° | –96% | 29% | ||||
| 14 | 27 | 53 | 292.500° | –92% | 38% | ||
| 54 | 298.125° | –88% | 47% | ||||
| 28 | 55 | 303.750° | –83% | 56% | |||
| 56 | 309.375° | –77% | 63% | ||||
| 4 | 8 | 15 | 29 | 57 | 315.000° | –71% | 71% |
| 58 | 320.625° | –63% | 77% | ||||
| 30 | 59 | 326.250° | –56% | 83% | |||
| 60 | 331.875° | –47% | 88% | ||||
| 16 | 31 | 61 | 337.500° | –38% | 92% | ||
| 62 | 343.125° | –29% | 96% | ||||
| 32 | 63 | 348.750° | -20% | 98% | |||
| 64 | 354.375° | -10% | 100% | ||||
| 1 | 1 | 1 | 1 | 360.000° | 0% | 100% |
Table 4 顯示了非循環(huán) 1/2 步進(jìn)操作。這種步進(jìn)模式比循環(huán) 1/2 步進(jìn)運(yùn)行消耗更多的功耗，但在高電機(jī)轉(zhuǎn)速下可提供更高的轉(zhuǎn)矩。
| 非循環(huán) 1/2 步進(jìn) | AOUT 電流
（滿量程中所占百分比） |
BOUT 電流
（滿量程中所占百分比） |
電角（度） |
|---|---|---|---|
| 1 | 0 | 100 | 0 |
| 2 | 100 | 100 | 45 |
| 3 | 100 | 0 | 90 |
| 4 | 100 | –100 | 135 |
| 5 | 0 | –100 | 180 |
| 6 | –100 | –100 | 225 |
| 7 | –100 | 0 | 270 |
| 8 | –100 | 100 | 315 |