DESCRIPTION

· The L9678 is a user-configurable airbag IC designed for full production, featuring a comprehensive suite of functionalities for automotive safety systems.

FEATURES

· Energy reserve voltage power supply with a high-frequency boost regulator at 1.882 MHz and user-selectable output voltage of 23 V or 33 V ±5%.

· User-configurable linear power supplies with 5.0 V and 7.2 V ±4% output voltages and external pass transistor.

· Fully integrated 3.3 V ±4% linear regulator.

· Battery voltage monitor and shutdown control with wake-up functionality.

· System voltage diagnostics with integrated ADC.

· Crossover switch with a maximum crossover performance of 3 Ω and 600 mA.

· Squib deployment drivers with 4-channel HSD/LSD, maximum deployment voltage of 25 V, and deployment profiles of 1.2 A @ 2 ms and 1.75 A @ 0.5/0.7 ms.

· Integrated safing FET linear regulator with nominal voltages of 20 V/25 V, current monitoring, and diagnostics for Rmeasure, STB, STG, and leakage.

· User-customizable safing logic.

· Two-channel PSI-5 remote sensor interface (asynchronous mode) available only in the L9678-S version.

· Four-channel interface for Hall-effect, resistive, or switch sensors.

· ISO9141 transceiver.

· Dual-channel configurable high-side/low-side LED driver.

· Watchdog timer.

· Two integrated oscillators at 7.5/16 MHz.

· Temperature sensor.

· 32-bit SPI communications.

· Minimum operating voltage of 6 V.

· Operating temperature range from -40 °C to 95 °C.

· Packaging in a 64-pin LQFP64 (10x10x1.4mm) format.

APPLICATIONS

· Automotive airbag systems.

· Safety-critical automotive electronics.

· Integrated vehicle safety systems.