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UM1756 bảng dữ liệu(PDF) 23 Page - STMicroelectronics

tên linh kiện UM1756
Giải thích chi tiết về linh kiện  The EVAL6480H-DISC and EVAL6482H-DISC are low cost development tools based
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UM1756 bảng dữ liệu(HTML) 23 Page - STMicroelectronics

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UM1756
Device configuration
49
Advanced current control (EVAL6482H-DISC)
The following configuration gives good results with most of motors:
The impacts of the timing parameters are explained in the application note AN4158: “Peak
current control with automatic decay adjustment and predictive current control: basics and
setup”.
4.3
Overcurrent protection
The overcurrent protection monitors the drain-source voltage drop of all the external Power
MOSFETs and disables the power stage when the programmed threshold is reached.
Warning:
The overcurrent protection can be disabled setting the flag
“Over-current- shutdown”.
However it is not recommended to disable this protection.
The stall detection threshold should be just above the operating peak current of the
application. During the preliminary stages of evaluation, it can be set to the maximum value.
Figure 16. Overcurrent protection
Table 7. Voltage mode driving
Parameter
Value
Unit
Minimum ON time
4
s
Minimum OFF time
21
s
Maximum fast decay (TOFF_FAST)
10
s
Maximum fast decay at step change (FAST_STEP)
16
s
Target switching time
48
s



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