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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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L9965P Scheda tecnica(PDF) 15 Page - STMicroelectronics |
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L9965P Scheda tecnica(HTML) 15 Page - STMicroelectronics |
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15 / 104 page  3.3.1.1 ERBST diagnostics Table 9. ERBST diagnostics Fault type Assertion condition IC reaction to assertion Release condition IC reaction to flag clear Maskable ERBST UV If the VERBST voltage falls below VERBST_UV_TH for an interval longer than tERBST_UV_FLT the ERBST UV fault is acknowledged The ERBST_UV flag is set FAULTN line is asserted The “fire inhibit” signal is set If the VERBST voltage rises above VERBST_UV _TH + VERBST_UV _HYS, the fault flag can be cleared by MCU FAULTN line is released Pyro-fuse fire is possible again Non-maskable ERBST OV If the VERBST voltage rises above VERBST_OV_TH for an interval longer than tERBST_OV_FLT the ERBST OV fault is acknowledged The ERBST_OV flag is set FAULTN line is asserted The ERBST is turned OFF The “fire inhibit” signal is set If the VERBST voltage drops below VERBST_OV _TH - VERBST_OV _HYS, the fault flag can be cleared by MCU FAULTN line is released Pyro-fuse fire is possible again ERBST_OV_FAULTN_MSK masks fault redirection on FAULTN pin ERBST_OV_FIRE_MSK masks the inhibition of pyro-fuse fire commands ERBSTSW OC If the ERBSTSW current raises above IERBST_OC for NERBST_OC_COUNT times the ERBST OC fault is acknowledged The ERBST_OC flag is set FAULTN line is asserted The ERBST is turned OFF Power cycle (CWUP toggle) is needed to restart again None ERBSTSW_OC_FAULTN_MSK masks fault redirection on FAULTN pin ERBSTSW OT If the ERSBSTW driver temperature exceeds TERBSTSW_SD for an interval longer than tERBSTSW_SD_FLT the ERBST OT fault is acknowledged The ERBST_OT flag is set FAULTN line is asserted The ERBST is turned OFF If the ERBSTSW driver temperature drops below TERBSTSW_SD - TERBSTSW_SD _HYS, the fault flag can be cleared by MCU ERBST re-enabled FAULTN line is released ERBSTSW_OT_FAULTN_MSK masks fault redirection on FAULTN pin ERBST diode loss If VERBSTSW-VERBST voltage rises above the VERBST_DLOSS_TH threshold for NERBST_DLOSS_COUNT times, the external diode loss failure is acknowledged The ERBST_DLOSS flag is set FAULTN line is asserted The ERBST is turned OFF The ERBSTSW clamping voltage is activated, limiting the voltage value to VERBSTSW_CLAMP Power cycle (CWUP toggle) is needed to restart again None ERBST_DLOSS_FAULTN_MSK masks fault redirection on FAULTN pin BSTGND loss See the Section 3.13: Ground loss monitor (GNDMON) See the Section 3.13: Ground loss monitor (GNDMON) See the Section 3.13: Ground loss monitor (GNDMON) See the Section 3.13: Ground loss monitor (GNDMON) See the Section 3.13: Ground loss monitor (GNDMON) 3.3.1.2 ERBST electrical parameters All parameters are tested and guaranteed in the following conditions, unless otherwise noted: all supplies according to the Table 3; TJ according to the Table 2. Table 10. ERBST supply electrical parameters Symbol Parameter Test condition Min Typ Max Unit Pin VERBST_UV_TH ERBST undervoltage threshold Max slew rate = 2.3 V/ms 4.7 - 5.3 V ERBST VERBST_UV_HYS ERBST undervoltage hysteresis Max slew rate = 2.3 V/ms 50 - 150 mV ERBST tERBST_UV_FLT ERBST undervoltage filter time Tested by SCAN 7 9 11 us ERBST VERBST_OV_TH ERBST overvoltage threshold Considering max nom value of 26 V + 5%, max slew rate = 2.3 V/ms 27.4 - 31.1 V ERBST L9965P Functional description DS14702 - Rev 4 page 15/104 |
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