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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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L9963E 데이터시트(PDF) 47 Page - STMicroelectronics |
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L9963E 데이터시트(HTML) 47 Page - STMicroelectronics |
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47 / 184 page  Figure 16. Cell monitoring with Internal balancing C10 S10 B10_9 C9 S9 RLPF RLPF C8 RLPF RDIS RDIS CLPF CLPF L9963E • Force lines used for balancing. Connect them as close as possible to the cell connector. This improves cell voltage sensing while balancing is ongoing, by minimizing the voltage drop on the sense lines while current is being sunk • Sense lines used for cell voltage measurement. Keep away from noisy lines. Recommended PCB layout strategy is to route them over the first layer and shield them using the second layer as GND plane The on-chip MOSFETs are switched on to sink a current from the cell, thus dissipating charge on RDIS. The affordable balancing current is restricted by the thermal relief on the current source circuits. The maximum balance current on each cell is 200 mA. All cells can be balanced simultaneously, provided that junction temperature doesn’t exceed the maximum operating defined in Table 5. To prevent thermal overstress, the Die temperature diagnostic and over temperature protections are implemented. For further information, refer to Section 6.6.1 Cell balancing with internal MOSFETs. 4.7.2 Passive cell balancing with external MOSFETs The external balancing includes the on-board power resistors and MOSFETs driven by the Sx pins. Figure 17. Cell monitoring with external balancing with the mixed NMOS and PMOS transistors C10 S10 B10_9 C9 S9 RLPF RLPF C8 RLPF RDRV RDRV CLPF CLPF L9963E • Force lines used for balancing. Connect them as close as possible to the cell connector. This improves cell voltage sensing while balancing is ongoing, by minimizing the voltage drop on the sense lines while current is being sunk • Sense lines used for cell voltage measurement. Keep away from noisy lines. Recommended PCB layout strategy is to route them over the first layer and shield them using the second layer as GND plane MP RDIS MN RDIS L9963E Cell balancing DS13636 - Rev 12 page 47/184 |
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