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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9908 датащи(PDF) 54 Page - STMicroelectronics |
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L9908 датащи(HTML) 54 Page - STMicroelectronics |
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54 / 153 page  Figure 28. VPRE monitor boot masking Note: The total external capacitance applied to VPRE should be selected in order to allow a VPRE boot time always lower than VPRE boot time masking. This means that the maximum total capacitance shall be: CVPRE_tot≤CP1iout_min CP1vout_maxTvpre_boot_mask_min=7.192μF (5) Table 49. VPRE Monitor electrical characteristics Symbol Parameter Min Typ Max Unit Notes VPRE_uv_th VPRE under-voltage threshold 6.4 6.7 7 V Comparator output Low to High VPRE_uv_hys VPRE under-voltage hysteresis 100 - 200 mV - T_vpre_uv_flt VPRE under-voltage detection filter time 1 - 5 μs Digital filter VPRE_ov_th VPRE over-voltage threshold 14.5 15.5 16.5 V Comparator output Low to High VPRE_ov_hys VPRE over-voltage hysteresis 100 - 250 mV - T_vpre_ov_flt VPRE over-voltage detection filter time 1 - 5 μs Digital filter T_vpre_boot_mask VPRE boot masking time 1.7 2 2.3 ms - Note: All parameters are guaranteed, and tested, in the voltage ranges reported above in Table 5 unless otherwise specified. Where not specified the parametrical operating range equals the functional operating range. L9908 Gate driver supply DS13546 - Rev 3 page 54/153 |
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