L9678P

L9678P is an automotive user configurable airbag and battery cut-off IC. It is a system chip solution targeted for emerging market applications. Base system designs can be completed with the L9678P, SPC560Px microcontroller and an on-board acceleration sensor or PSI5 sensor. Energy reserve voltage is derived through a cost effective high frequency boost regulator. High frequency operation allows the user to pick up low value and cheap inductance. Battery voltage is sensed through the VBATMON pin providing start-up and shutdown control for the system. Once battery voltage drops below the minimum operating voltage, the device enables the integrated crossover switch to permit orderly shutdown. It offers two linear regulators. User can use one of these regulators to supply µC. Input/output pins are compatible with both ranges by dedicated supply pin VDDQ. Application includes low end airbag systems, cut-off battery systems, pyro fuse/pyroswitch management.

• AEC-Q100 qualified
• Fully integrated 3.3V ±4% linear regulator, watchdog timer, two integrated oscillators: 7.5/16MHz
• Battery voltage monitor and shutdown control with wake-up control, temperature sensor
• High frequency boost regulator, 1.882MHz, output voltage user selectable, 23V or 33V ±5%
• Dual channel configurable high-side/low-side LED driver
• System voltage diagnostics with integrated ADC, ISO9141 transceiver
• Crossover performance, max 3ohm, 600mA max, 4 channel HSD/LSD, 32 bit SPI communications
• User customizable safing logic, two channel PSI-5 remote sensor interface
• Minimum operating voltage is 6V, packaging - 64 pin
• Operating temperature range from -40°C to 95°C, LQFP64 package