L584 Datasheet, PDF (1/13 Pages) STMicroelectronics – MULTIFUNCTION INJECTION INTERFACE

L584
MULTIFUNCTION INJECTION INTERFACE
. DRIVES ONE OR TWO EXTERNAL DAR-
LINGTONS
. DUAL AND SINGLE LEVEL CURRENT CON-
TROL
. SWITCHMODE CURRENT REGULATION
. ADJUSTABLE HIGH LEVEL CURRENT DURA-
TION
. WIDE SUPPLY RANGE (4.75 - 46V)
. TTL-COMPATIBLE LOGIC INPUTS
. THERMAL PROTECTION
. DUMP PROTECTION
PRELIMINARY DATA
DIP16 (12 + 2 + 2)
DESCRIPTION
The L584 is designed to drive injector solenoids in
electronic fuel injection systems and generally in-
ductive loads for automotive applications. The de-
vice is controlled by two logic inputs and features
switchmode regulation of the load current driving an
external darlington and an auxiliary one for the cur-
rent recirculation. A key feature of the L584 is flexi-
bility. It can be used with a variety of darlingtons to
match the requirements of the load and it allows
both simple and two level current control. Moreover,
BLOCK DIAGRAM
ORDERING NUMBER : L584
the drive waveshape can be adjusted by external
components. Other features of the device include
dump protection, thermal shutdown, a supply vol-
tage rangeof 4.75 - 46V and TTL-compatible inputs.
The L584 is suppliedin a 16 lead Powerdip package
which uses the four center pins to conduct heat to
the PC board copper.
November 1988
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