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L9963E 数据表(PDF) 76 Page - STMicroelectronics |
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L9963E 数据表(HTML) 76 Page - STMicroelectronics |
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76 / 184 page  4.11.27 GND loss detection The device is able to check a possible AGND or DGND or CGND loss detection. If one of these ground pins has a voltage level higher than GND_LOSS_THR for a time longer than digital filter TGND_LOSS_filter the fault is confirmed and latched into one among loss_agnd, loss_dgnd or loss_cgnd bit. 4.11.28 Safety mechanisms summary Table 54. Safety mechanisms summary Category Diagnostic name Condition Available in Availability type Actions SPI related fields name SPI related fields descriptio n Cells Cell UV VCELL < VCELL_UV Normal, Cyclic Wakeup Periodic or On- Demand Voltage Conversion Routine •Set Latch •Raise FAULTL •Stop balance on involved cell •Configuration override VCellx Measureme nt Result Y E S VCELLx_E N = 0 VCELLx_U V Fault Latch threshVcell UV UV threshold Cells Cell Balance UV VCELL < VBAL_UV_T H Normal, Cyclic Wakeup Periodic or On- Demand Voltage Conversion Routine •Set Latch •Raise FAULTL •Stop balance on involved cell •Configuration override VCellx Measureme nt Result Y E S VCELLx_E N = 0 OR VCELLx_B AL_UV_MS K = 1 VCELLx_B AL_UV Fault Latch Vcell_bal_ UV_delta_t hr Increment in respect to threshVcell UV Cells Cell OV VCELL > VCELL_OV Normal, Cyclic Wakeup Periodic or On- Demand Voltage Conversion Routine •Set Latch •Raise FAULTL •Configuration override VCellx Measureme nt Result Y E S VCELLx_E N = 0 VCELLx_O V Fault Latch threshVcell OV OV threshold Battery Stack Sum Of Cells UV VBATT_SUM < VBATT_UV_S UM Normal, Cyclic Wakeup Periodic or On- Demand Voltage Conversion Routine •Set Latch •Raise FAULTL •Stop balance on whole stack •Configuration override vsum_batt1 _0 Measureme nt Result LSB N O vsum_batt1 9_2 Measureme nt Result MSB VSUM_UV Fault Latch VBATT_SU M_UV_TH UV threshold Battery Stack Sum Of Cells OV VBATT_SUM > VBATT_OV_S UM Normal, Cyclic Wakeup Periodic or On- Demand Voltage Conversion Routine •Set Latch •Raise FAULTL •Configuration override vsum_batt1 _0 Measureme nt Result LSB N O vsum_batt1 9_2 Measureme nt Result MSB L9963E Safety and diagnostic features DS13636 - Rev 12 page 76/184 |
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