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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9945 датащи(PDF) 135 Page - STMicroelectronics |
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L9945 датащи(HTML) 135 Page - STMicroelectronics |
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135 / 151 page  Table 44. Deglitch filter time for OFF state diagnostics Symbol Parameter Min. Max. Unit tFIL_OFF Deglitch filter time for OFF state diagnostics 0.3 0.5 µs Figure 36. Deglitch and settling filter times for OFF state diagnostics: (left) STG detection on LS; (right) STB detection on HS t t t t t t Transient fault t t GADG1303170949PS No OL/STG transition ON → OFF DIAG t FIL_OFF t OL V LVT V LS OFF Diagnostics Vout Fast charge fault Transient counter Settling filter Deglitch STG fault Permanent No OL/STB transition ON → OFF discharge Fast counter Settling filter Deglitch DIAG t FIL_OFF t OL V LVT V HS OFF Diagnostics Vout STB fault Permanent Note: Vout corresponds to DRNx pin for LS NMOS and HS PMOS configurations, while it's SNGPx pin for HS NMOS configuration. 6.4.2 Diagnostic thresholds The diagnostic thresholds are fixed, as shown in the table below. They have been designed in tracking, thus both spreading in the same direction. Table 45. OFF state diagnostic thresholds Symbol Parameter Min. Max. Unit VLVT Threshold for: • STG detection in LS config (Vout < VLVT) • OL detection in HS/LS config (VLVT < Vout < VOL) 1.9 2.3 V VOL Threshold for: • STB detection in HS config (Vout > VOL) • OL detection in HS/LS config (VLVT < Vout < VOL) 2.8 3.4 V Note: Vout corresponds to DRNx pin for LS NMOS and HS PMOS configurations, while it's SNGPx pin for HS NMOS configuration. L9945 OFF state diagnostics DS12275 - Rev 8 page 135/151 |
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