l6480过流检测

你好
我使用l6480驱动双极步进电机。一切都很好电机运行良好，但过电流检测功能是不可预测的工作。我已被禁用此功能，然后电机工作正常，并且存在关于电流阈值的计算的混淆。在'AN4355应用笔记'中
写道，'IOCDth = VOCDth×Rds（ON）'与l6480数据表的说法相矛盾，后者说'L6480测量每个半桥的负载电流，检测VDS电压所有功率MOSFET（图12）。当任何VDS电压超过设定的阈值时'。我想了解这个OCD功能。



以下为原文




hello
I am driving bipolar stepper motor using l6480. everything is fine motor is running excellent but the over current detection feature is working unpredictably. i have been disabled this feature then motor is working good, and there is confusion about the calculations of current threshold. in 'AN4355 Application note' it is written that 'IOCDth = VOCDth × Rds(ON)' which is contradicting the statement of datasheet of l6480, which says ' The L6480 measures the load current of each half-bridge sensing the VDS voltage of all the Power MOSFETs (Figure 12). When any of the VDS voltages rise over the programmed threshold'. i want to understand this OCD feature.