L9779WD-SPI Multifunction IC for engine management system Datasheet - production data Protected low-side (high current) OUT5, 6, 7 Protected low-side (low current) OUT20 IGBT pre-drivers (IGN1 to 4) with parallel input Parallel input IN1 to IN7 to drive OUT1 to OUT7 * 3*36 Configurable power stages CPS HiQUAD-64 Stepper motor driver/ high-side - low-side (OUTA to D) Thermal warning and shutdown Serial interface SPI 16-bit frame Features ISO9141 interface (K-Line) 5 V logic regulator High speed CAN transceiver 3.3 V logic regulator VDA 2.0 compliance with 3 level Watchdog 5 V tracking sensor supply Package: HiQUAD-64 Smart reset function Description Power latch with Secure Engine Off (SEO) functionality, to safely complete driver switch The L9779WD-SPI is an integrated circuit off procedure designed for automotive environment and Flying wheel interface function (VRS) with implemented in BCD6S technology. adaptive time and amplitude control It is conceived to provide all basic functions for Protected low-side relay driver standard engine management control units. OUT13 to 18, MRD It is assembled in the HiQUAD-64 power Protected low-side (injector drivers) package. OUT1 to 4 Table 1. Device summary Order code Package Packing L9779WD-SPI HiQUAD-64 Tray L9779WD-SPI-TR HiQUAD-64 Tape and Reel May 2015 DocID027721 Rev 2 1/141 This is information on a product in full production. www.st.comContents L9779WD-SPI Contents 1 Detailed features description 9 2 Block diagram . 11 3 Pins description . 12 4 Application schematic 16 5 Absolute maximum ratings 17 5.1 ESD protection . 18 5.2 Latch-up test 19 5.3 Temperature ranges and thermal data . 19 5.4 Operating range 19 5.4.1 Low battery 19 5.4.2 Normal battery 19 5.4.3 High battery 19 5.4.4 Load dump . 19 6 Functional description 20 6.1 Ignition switch, main relay, battery pin . 20 6.2 Power-up/down management unit 21 6.2.1 Power-up sequence 21 6.2.2 Power-down sequence . 23 6.3 Smart reset circuit 29 6.3.1 Smart reset circuit functionality description 29 6.4 Thermal shut down 33 6.5 Voltage regulators 34 6.6 Charge pump 40 6.7 Main relay driver 44 6.7.1 Main relay driver functionality description . 44 6.7.2 MRD scenarios . 45 6.8 Low-side switch function (LSa, LSb, LSd) 50 6.8.1 LSa function OUT 1 to 5 (Injectors) 50 2/141 DocID027721 Rev 2