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Linear Products
Automotive Fuel Injector Control
Using Power+
Control with Power+ Arrays
Devices
Application Brief
the system designer the flexibility to
select the power stage that best fits the
particular system load requirements.
Figure 1. ECU Block Diagram
The automotive industry is faced with
increasingly strict environmental regula-
tions which require that automotive
module designs include real-time moni-
toring and off-line fault isolation. These
requirements demand that protection and
fault diagnostics be present in the module
to help monitor emission levels and
maintain system reliability. One area that
is very sensitive to these requirements is
the automotive powertrain. With today’s
highly specialized fuel systems, fuel
injector drive is of key interest.
Typical Control Outputs
Typical Sensor
Inputs
Design flexibility to select
power output stage that matches
system load requirements
Parallel input interface to
provide real-time control of
outputs
Fault diagnostics to increase
fault isolation capability
SYSTEM BENEFITS
TPIC46L01/02
6-Channel
Pre-FET Driver
Battery
CTS
IAT
IAC
MAP
TPS
CPR
O
2
Lamps
Valves
Fuel Injector
Idle Speed
Throttle
Relays
Ignition
TPIC2603
6-Channel
Low-Side Driver
TPIC2601
6-Channel
Power+ Array
TPIC0107/8
H-Bridge Driver
400 V
Low-Side Driver
Coolant Temp Sensor
Intake Air Temp
Intake Air Control Valve
Manifold Absolute Pressure
Throttle Position Sensor
Crank Pulse Reference Sensor
Oxygen Sensor
ECU
Texas Instruments has introduced four
new devices, the TPIC46L01/02 and
TPIC44L01/02, that are well-suited for
fuel injector control applications. The
6-channel TPIC46L01/02 and the
4-channel TPIC44L01/02 are low-side
pre-FET drivers capable of serial or
parallel interface. These predrivers,
which can control either TI’s Power+
Arrays
or discrete power FET’s, allow
A typical engine control unit (ECU) is
shown in Figure 1. The ECU receives
sensor and control inputs from the engine
and drives medium-current loads that
require protection and fault diagnostics.
In a typical engine control module, loads
such as relays, lamps, and solenoid-con-
trolled valves may be driven by TI’s
TPIC2603, 6-channel low-side power
driver. The TPIC0107 or TPIC0108,
H-bridge driver can control the throttle
and idle speed. The fuel injector drive is
accomplished by the TPIC46L01 or
TPIC46L02, 6-channel pre-FET driver,
in conjunction with the TPIC2601,
6-channel Power+ Array. This applica-
tion is discussed in greater detail below.
The configuration of the TPIC44L01 or
TPIC44L02, 4-channel pre-FET drivers,
in conjunction with the TPIC2401,
Application Overview
The TPIC46L01/02 offers serial interface
to the microcontroller to transfer control
data to the driver and output fault data
back to the controller. The pre-FET driver
4-channel Power+ Array will be
discussed at the end of this application
brief.
Trademark of Texas Instruments Incorporated
Verzeichnis
- ・ Blockdiagramm on Seite 1 Seite 2
- ・ Anwendungsbereich on Seite 9
