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参数资料
| 型号： | A4989SLDTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 6/17页 |
| 文件大小： | 0K |
| 描述： | IC FULL BRDG MFET DRVR 38TSSOP |
| 标准包装： | 1 |
| 应用： | 步进电机控制器，2 相 |
| 输出数： | 1 |
| 电压 - 负载： | 12 V ~ 50 V |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 38-TFSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 38-TSSOP |
| 包装： | 标准包装 |
| 其它名称： | 620-1389-6 |
A4989
RESET
Dual Full-Bridge MOSFET Driver
with Microstepping Translator
STEP
t WAKE
t STEPH
t STEPL
t SU
t H
MS x , DIR
Figure 1. Logic Interface Timing Diagram
T able 1. Microstep Resolution Truth Table
MS2
0
0
1
1
MS1
0
1
0
1
Microstep Resolution
Full Step
Half Step
Quarter Step
Sixteenth Step
Table 2. Mixed Decay Selection Truth Table
Microstep
Magnitude
PFDx State
Setting
Full Step
(MS2 = 0, MS1 = 0)
Half Step
(MS2 = 0, MS1 = 1)
1/4 Step
(MS2 = 1, MS1 = 0)
1/16 Step
(MS2 = 1, MS1 = 1)
of Current
Rising
Falling
Rising
Falling
Rising
Falling
Rising
Falling
PFD2 = 0, PFD1 = 0
Slow
Slow
Slow
Slow
Slow
Slow
Slow
Slow
PFD2 = 0, PFD1 = 1
Slow
Slow
Slow
11%
Step 1: 11%
11%
Steps 1 to 5: 11%
11%
PFD2 = 1, PFD1 = 0
Slow
Slow
Slow
26%
Step 1: 11%
26%
Steps 1 to 5: 11%
26%
PFD2 = 1, PFD1 = 1
Slow
Slow
Slow
Fast
Step 1: 11%
Fast
Steps 1 to 5: 11%
Fast
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6
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