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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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L9963E 데이터시트(PDF) 143 Page - STMicroelectronics |
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L9963E 데이터시트(HTML) 143 Page - STMicroelectronics |
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143 / 184 page  6.7.2 Centralized BMS In a centralized BMS, the FAULT Line can be easily implemented via a wired-OR approach. This allows a consistent simplification of the BOM. The optocouplers can be all fed by the same supply as the MCU. Then, only a pull-down resistor and an RC filter are needed to interface the fault output bus to the GPIO used to read back the fault status. FAULTH input is not used and must be connected to DGND. The recommended circuit is shown in Figure 40. Table 80. Fault line BOM for a centralized BMS Components Value Unit Max. tolerance Rating Comments RPD 10 kΩ 10% 1/16 W Pull-down resistor for FAULT input RFIL_FAULT 1 kΩ 10% 1/16 W Filtering the FAULT signal. Place this as close as possible to the MCU GPIO sensing the fault line. CFIL_FAULT 100 pF 10% 16 V Filtering the FAULT signal. Place this as close as possible to the MCU GPIO sensing the fault line. RBASE 2 kΩ 10% 1/16 W Limit base current to the optoisolator OPT 3.75 kVrms The PS2703-1-F3-K-A is recommended for isolated propagation of the FAULT signal L9963E FAULT line circuit DS13636 - Rev 12 page 143/184 |
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