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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9960 датащи(PDF) 57 Page - STMicroelectronics |
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L9960 датащи(HTML) 57 Page - STMicroelectronics |
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57 / 95 page  DS11115 Rev 10 57/95 L9960, L9960T Functional description 94 4.7.3 Short-circuit to battery: over-current detection in low-side transistors Figure 25. Example of low-side transistor low impedance short circuit to battery (I < Ioc_ls) The low-side transistors are protected against over-current due to an output short-circuited to battery. When a low-side transistor is switched on, the current is monitored and if the low- side over-current threshold "Ioc_ls" is overtaken for duration longer than "Toc_ls", the bridge is switched to disable. This information is stored and latched in bits called "OCL_x". The bits "OCL_x" are reset and the bridge is released when diagnostics is read by SPI (if DIAG_CLR_EN=1 only), or by DIS level change (falling edge) or by RESET. TTSD Over-temperature filtering time Guaranteed by clock measurement 1.7 2 2.3 µs Tsecure Time out to decrease Ilim Guaranteed through scan 1.5 - 2 s Tsdoff Over-temperature shutdown release time Filter on OTSD release (guaranteed through scan) 90 100 110 ms OTsd- OTwarn Rang of temperature dependent current reduction -20 - - °C Tj_range Junction temperature analog output range - 125 - 190 °C Tj_acc Junction temperature analog output accuracy Guaranteed through scan - - 3 °C TOT_warn Temperature warning filtering time -1 - 3 µs Table 70. Over-temperature monitoring electrical characteristics (continued) Symbol Parameter Condition Min. Typ. Max. Unit Battery OUT2 OUT1 GND DC motor Rshort OFF ON OFF OFF current GAPGPS02344 |
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