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STMicroelectronics Electronic Components Datasheet

L9779WD Datasheet

Multifunction IC

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L9779WD
Multifunction IC for engine management system
Datasheet - production data
*$3*36
HiQUAD-64
Features
5 V logic regulator
3.3 V logic regulator
5 V tracking sensor supply
Smart reset function
Power latch with Secure Engine Off (SEO)
functionality, to safely complete driver switch
off procedure
Flying wheel interface function (VRS) with
adaptive time and amplitude control
Protected low-side relay driver
– OUT13 to 18, MRD
Protected low-side (injector drivers)
– OUT1 to 4
Protected low-side (high current)
– OUT5, 6, 7
Protected low-side (low current)
– OUT19, 20
IGBT pre-drivers (IGN1 to 4)
External MOS pre-drivers (OUT8 to 9)
Configurable power stages CPS
– Stepper motor driver/ high-side - low-side
(OUT21 to 28)
Thermal warning and shutdown
Serial interface
– Micro Second Channel interface (MSC)
– ISO9141 interface (K-Line)
High speed CAN transceiver
Dedicated pin VDDIO to select the voltage
level of digital output used for serial
communication
VDA 2.0 compliance with 3 level Watchdog
Package: HiQUAD-64
Description
The L9779WD is an integrated circuit designed
for automotive environment and implemented in
BCD6S technology.
It is conceived to provide all basic functions for
standard engine management control units.
It is assembled in the HiQUAD-64 power
package.
Order code
L9779WD
L9779WD-TR
Table 1. Device summary
Package
HiQUAD-64
HiQUAD-64
Packing
Tray
Tape and Reel
September 2015
This is information on a product in full production.
DocID027452 Rev 5
1/170
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STMicroelectronics Electronic Components Datasheet

L9779WD Datasheet

Multifunction IC

No Preview Available !

Contents
Contents
L9779WD
1 Detailed features description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 Application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1 ESD protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2 Latch-up test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.3 Temperature ranges and thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4 Operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.1 Low battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.2 Normal battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.3 High battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.4 Load dump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.1 Ignition switch, main relay, battery pin . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.2 Power-up/down management unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.2.1 Power-up sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.2.2 Power-down sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.3 VDD_IO function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.3.1 Description of VDD_IO function and IC pin . . . . . . . . . . . . . . . . . . . . . . 31
6.4 Smart reset circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.4.1 Smart reset circuit functionality description . . . . . . . . . . . . . . . . . . . . . . 32
6.4.2 VDD5_UV detection modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.5 Thermal shut down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.6 Voltage regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.7 Charge pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.8 Main relay driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.8.1 Main relay driver functionality description . . . . . . . . . . . . . . . . . . . . . . . 49
2/170
DocID027452 Rev 5


Part Number L9779WD
Description Multifunction IC
Maker STMicroelectronics
PDF Download

L9779WD Datasheet PDF






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