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L9678P 数据表(PDF) 17 Page - STMicroelectronics |
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L9678P 数据表(HTML) 17 Page - STMicroelectronics |
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17 / 203 page  DocID029274 Rev 3 17/203 L9678P, L9678P-S Overview and block diagram 202 3 Overview and block diagram The L9678P is a unique solution specifically targeted for entry level airbag systems while permitting the system designer significant flexibility in configuring the system power and management block. The configurable methodology allows cost versus performance trade- off without changing devices or circuit board designs. The L9678P contains the base functionality required for entry level systems and can complete a system design with a microcontroller and acceleration sensor. The high level block diagram is shown below Figure 2. Basic features include a configurable power supply & management block, 4 channel squib drivers, 2 channel HS/LS GPO drivers, 4 channel sensor interface, safing logic, watchdog timer, ISO9141 communications and temperature sensor. The L9678P-S device is pin compatible to the L9678P and includes two PSI-5 remote sensor interface channels and a dedicated regulator for remote sensor. |
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