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L9961 Datasheet(PDF) 53 Page - STMicroelectronics |
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L9961 Datasheet(HTML) 53 Page - STMicroelectronics |
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53 / 63 page  5.9.2 Safety bypass in LS configuration Figure 25. Fail-safe switch in LS configuation GADG220620221421SA L9961 VSD DCHG CHG VSC P+ P- RDCHG RCHG MDCHG MCHG DZCHG VB RGCHG From µC Fail-safe switch Disable CHG MOSFET driver BFS P+ Table 42. BOM for Fail-safe switch in HS configuration Components Value Unit Max. tolerance Rating Comments BFS - - - 40 V NPN fail-safe switch driven by MCU. It shall be sized in order to sink IPU (charge current source) in case of fault during the charger fase. In case of fault the NPN base shall be driven high by MCU. L9961 Safety bypass DS14012 - Rev 1 page 53/63 |
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