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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) 58 Page - STMicroelectronics |
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L9908 датащи(HTML) 58 Page - STMicroelectronics |
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58 / 153 page  Symbol Parameter Test Condition Min Typ Max Unit Notes BT_lim1_sat_drop BT Charge Limiter1 VRE-CBS_n drop voltage for ICBS_n = 0 mA CBS_n = Open 335 490 535 mV [n = 1,2,3] 1. Not subject to production test. This is an equivalent resistance, its value shall be used for bootstrap charge timings estimation only. 5.11.5 VCP monitor VCP voltage level is monitored by means of the dedicated UV and OV diagnosis. Hysteresis on thresholds and filtering time is implemented. If VCP ≤ VCP_uv_th occurs for an interval longer than T_vcp_uv_flt filtering time, the VCP_UV flag is set. The error flag remains set until the failure condition is removed and the flag is cleared by the SPI command. If VCP ≥ VCP_ov_th occurs for an interval longer than T_vcp_ov_flt filtering time, the VCP_OV flag is set. The error flag remains set until the failure condition is removed and the flag is cleared by the SPI command. To avoid UV detection during power up VCP monitor comparators are masked for a T_vcp_boot_mask filtering time, starting from each low to high transition of the internal CP1 enabling command. Figure 31. VCP UV boot masking Table 54. VCP Monitor electrical characteristics Symbol Parameter Test Condition Min Typ Max Unit Notes VCP_uv_th VCP-VDH under-voltage threshold - 4.5 5.1 5.8 V Comparator output Low to High VCP_uv_hys VCP under-voltage hysteresis - 200 300 400 mV - T_vcp_uv_flt VCP under-voltage detection filter time CLK_SSM_EN = 0 10 - 15 μs Digital filter guaranteed through scan pattern VCP_ov_th VCP-VDH over-voltage threshold - 15.8 17.6 19.5 V Comparator output Low to High VCP_ov_hys VCP over-voltage hysteresis - 50 325 500 mV - T_vcp_ov_flt VCP over-voltage detection filter time CLK_SSM_EN = 0 10 - 15 μs Digital filter guaranteed through scan pattern T_vcp_boot_mask VCP boot masking time - 1.7 2 2.3 ms - L9908 Gate driver supply DS13546 - Rev 3 page 58/153 |
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