Freescale's safety bladder system solution

Freescale's safety bladder system solution

The core element of the bladder system is a control device that combines a 16-bit or 32-bit MCU with a set of local acceleration sensors. Depending on the complexity of the system, additional satellite sensors provide auxiliary collision information through standardized sensor buses (such as Peripheral Sensor Interface 5 (PSI5) and Distributed System Interface (DSI)). Processed sensor input with dedicated multi-channel electric explosion driver circuit for exciting front, side and curtain airbags.


As an additional safety element, if the battery connection is lost in an accident, an efficient switch-mode power supply component keeps the system running for hundreds of milliseconds.



Freescale's safety bladder system solution block diagram

Products for bladder systems

Product Series

product

Explanation

32-bit MCU

• MPC560xP

• The main controller of sensor data processing

16-bit MCU

• S12XE

• S12XS

• S12XF

• S12P

• Safety companion controller for redundancy and watchdog function

8-bit MCU

• S08SG / SL

• Safety companion controller for redundancy and watchdog function

Analog and mixed signal integrated circuits

• MC33742

• MC33797

• MC33661, MC33902

• MC33780, MC33781, MC33784, MC33793

• System basis chip

• Detonator drive

• CAN / LIN transceiver

• DSI bus interface device

sensor

• MMA12xxEG, MA23xxEG,

MMA5xxxEG, MPXS100xEG,

MMA68xxQ, MA52xxW,

MMA81xxEG, MMA82xxEG

• Local acceleration sensor

• Local flip sensor

• Accelerating satellite sensors

• Pressure Sensor

Available tools

Evaluation boards, calibration solutions, reference designs, software libraries, AUTOSAR

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