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L9679P 数据表(PDF) 23 Page - STMicroelectronics |
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L9679P 数据表(HTML) 23 Page - STMicroelectronics |
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23 / 279 page ![]() DS11627 Rev 7 23/279 L9679P Overview and block diagram 278 5 Overview and block diagram The L9679P IC is an application specific standard component air bag system chip. Its main functions include, power management, deployment drivers, remote sensor interfaces (PSI-5 satellite sensors), diagnostics, deployment arming, hall-effect sensor interface, general purpose output drivers, watchdog timer and a dedicated passenger airbag disarm signal. A block diagram for this IC is shown in Figure 2. Figure 2. Device function block diagram ER Boost Regulator (23V / 33V) SYNC Boost Regulator (12V / 14.7V) SAT Buck Regulator (7.2V / 9V) Energy Reserve Crossover Control VCC Buck Regulator (3.3V/ 5V) ER CAP Diagnostics and Charge Control Remote Sensor Interface Deployment Drivers Configurable General Purpose Output Drivers DC Sensor Interface Wake-up & Power Moding Control Global Configuration & Control K-Line Remote Sensor Configuration & Control Arming, Scrapping & CPU Integrity Monitor Watchdog X X X X X X X X X X X X X X X X X X X X X X X X X X X X WAKEUP VIN ERBSTSW ERBOOST VER SYNCBSTSW SYNCBOOST SATGND X X X Bias, Diagnostics & ADC X RSU0 X RSU1 X X X X X X X X …….. SS67 SF0 SR0 X X X X X X SF7 SR7 X BSTGND X HSSREG X VSF SATSYNC X X X X X X X X X GNDSUB1 / Exposed Pad X X X X X X VBATMON SS01 X WD2_LOCKOUT GNDSUB2 / Exposed Pad X GADG0810181535PS |
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