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L9963E 数据表(PDF) 46 Page - STMicroelectronics |
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L9963E 数据表(HTML) 46 Page - STMicroelectronics |
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46 / 184 page  Symbol Parameter Test conditions Min. Typ. Max. Unit VCUR_SENSE Input voltage for ADC conversion Application info. Absolute voltage on ISENSEP/M pins. Same as operating range -300 +300 mV VDIFF_CUR_SENSE Differential input voltage. ISENSEP- ISENSEM range Design info -150 +150 mV ICELLRES Current Measurement Resolution ±1750 A full scale input assuming 18- bit signed data output and an Rshunt = 0.1 mΩ Not tested, application info 13.33 mA VISENSE_RES Voltage Measurement Resolution ±175 mV full scale input assuming 18- bit signed data output Design info 1.33 μV ICELLERR Current Measurement Error VDIFF_SENSE = V(ISENSE+) - V(ISENSE-) -150 mV ≤ VDIFF_CUR_SENSE < -60 mV, -40 °C < TJ < 125 °C -0.5 0.5 % ICELLERR2 -60 mV ≤ VDIFF_CUR_SENSE ≤ 60 mV -40 °C < TJ < 125 °C -0.3 0.3 mV ICELLERR3 60 mV < VDIFF_CUR_SENSE ≤ 15 0 mV, -40 °C < TJ < 125 °C -0.5 0.5 % ICURR_SENSE_OC_SLEEP ISENSE Over-current Fault Threshold in Cyclic Wakeup Tested in SCAN (76.8A with Rshunt = 0.1 mΩ) 0 10.55488 mV ICURR_SENSE_OC_NORM ISENSE Over-current Fault Threshold in Normal 0 175 mV ICELL_OC_SLP_RES ISENSE Over-current Fault Threshold Resolution in Cyclic Wakeup Application info (+/-3.4048A with Rshunt = 0.1 mΩ) 340.48 μV ICELL_OC_NORM_RES ISENSE Over-current Fault Threshold Resolution in Normal Application info (+/-13.3 mA with Rshunt = 0.1 mΩ) 1.33 μV VISENSE_OPEN_thr ISENSE pins open threshold voltage 1.5 1.7 1.9 V TCURR_SENSE_OPEN_filter Open digital filter time Tested in SCAN 60 μs 4.7 Cell balancing The Sx and Bx_x-1 pins are used to balance the charge of the cells by discharging the ones with a higher SOC (State Of Charge). Balancing can be performed either with external or internal MOSFETs. Cell balance drivers are powered by VBAT stack voltage. Hence, balancing is theoretically possible even at low cell voltages, with an exception for cell 14. In case VCELL14 < VCELL14_BAL_MIN, the correspondent balancing circuitry will not operate properly and false overcurrent detection may occur. 4.7.1 Passive cell balancing with internal MOSFETs The internal balancing requires only on-board resistors, and the MOSFETs which are embedded in the chip. L9963E Cell balancing DS13636 - Rev 12 page 46/184 |
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