L9678P STMicroelectronics

L9678P L9678P-S Automotive user configurable airbag and battery cut-off IC Datasheet - production data High and low side driver FET tests Safing FET test User customizable safing logic Two channel PSI-5 remote sensor interface (asynchronous mode), only for L9678P-S version GAPGPS00313 Four channel hall-effect, resistive or switch LQFP64 (10x10x1.4mm) sensor interface ISO9141 transceiver Dual channel configurable high-side/low-side LED driver Features Watchdog timer AEC-Q100 qualified Two integrated oscillators: 7.5/16 MHz Energy reserve voltage power supply Temperature sensor High frequency boost regulator, 1.882 MHz 32 bit SPI communications Output voltage user selectable, 23 V or Minimum operating voltage = 6 V 33 V 5% Operating temperature, -40 C to 95 C User configurable linear power supplies 5.0 V and 7.2 V 4% output voltages Packaging - 64 pin External pass transistor Fully integrated 3.3 V 4% linear regulator Applications Battery voltage monitor and shutdown control Low end airbag systems with wake-up control Cut-off battery systems System voltage diagnostics with integrated Pyro Fuse/Pyroswitch management ADC Crossover switch Crossover performance, max 3 , 600 mA max. Squib/pyroswitch deployment drivers 4 channel HSD/LSD 25 V maximum deployment voltage 1.2 A 2 ms and 1.75 A 0.5/0.7 ms deployment profiles Integrated safing FET linear regulator, 20 V/25 V nominal Current monitoring Rmeasure, STB, STG and leakage diagnostics November 2021 DS11626 Rev 5 1/210 This is information on a product in full production. www.st.comContents L9678P, L9678P-S Contents 1 Description 12 2 Absolute and operative maximum ratings 13 2.1 Absolute maximum ratings 13 2.2 Operative maximum ratings . 15 2.3 Pin-out description 17 3 Overview and block diagram . 18 4 Start-up power control 20 4.1 Power supply overview . 20 4.2 Power mode control . 21 4.2.1 Power off mode . 22 4.2.2 Sleep mode 22 4.2.3 Active mode 22 4.2.4 Passive mode 22 4.2.5 Power-up and power-down sequence 24 4.2.6 Operating states 27 4.3 Configurable system power control . 29 4.3.1 ERBOOST switching regulator . 29 4.3.2 Energy reserve capacitor charging circuit . 30 4.3.3 ER switch and COVRACT pin 31 4.3.4 VDD5 linear regulator 32 4.3.5 VDD3V3 linear regulator 33 4.3.6 VSUP linear regulator (optional) 34 4.3.7 VSF linear regulator 34 4.4 Reset functions . 35 5 SPI interface . 37 5.1 Global SPI register 51 Read/write register . 53 5.1.1 Fault status register (FLTSR) . 53 5.1.2 System configuration register (SYS CFG) 55 5.1.3 System control register (SYS CTL) 57 2/210 DS11626 Rev 5