L584 查看數據表（PDF） - STMicroelectronics

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L584

MULTIFUNCTION INJECTION INTERFACE

STMicroelectronics 

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

1/13

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