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L9177ATR Datasheet(PDF) 32 Page - STMicroelectronics |
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L9177ATR Datasheet(HTML) 32 Page - STMicroelectronics |
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32 / 55 page ![]() Figure 23. Low side driver diagnosis I-V relationship GAPGPS00607 3.5.5 Current limited low side driver on/off diagnosis In OFF condition diagnosis is the same as Low side, with Tmask 3.5 ms ±25 % and Tdgc_noise 3.6 µs ± 40 %, while in ON condition initial Inrush current is masked for Tmask_rush of 336 µs ±25 % then, if an over current fault occurs the drivers enter in current limitation condition for a digital filtering time Tdgc of 20 µs ±25 %, then it is switched OFF and the fault is latched. The channel is turned ON again by input command transition. The latched fault is cleared on request via SPI. Over current fault has higher priority with respect to OFF condition faults. L9177A Diagnosis DS12175 - Rev 5 page 32/55 |
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