®

L484

September 2003

MAGNETIC PICKUP IGNITION CONTROLLER

.

DIRECT DRIVING OF THE EXTERNAL DAR-

LINGTON

.

OPERATES WITH A WIDE RANGE OF MAG-

NETIC PICKUP TYPES

.

CHARGING ANGLE (DWELL) CONTROL

.

COIL CURRENT PEAK LIMITATION

.

CONTINUOUS COIL CURRENT PROTECTION

.

TACHOMETER SIGNAL OUTPUT

.

EXTERNAL DARLINGTON OVERVOLTAGE

PROTECTION

.

LOAD DUMP AND REVERSE BATTERY PRO-

TECTION

.

POSSIBILITY OF SPARK POINT DELAYING

(ANTI KNOCK SYSTEM)

DESCRIPTION

The L484 is an integrated circuit designed for use

with an NPN darlington in breakerless ignition sys-

tems with magnetic pickup sensors and high energy

ignition coils.

A key feature of the L484 is flexibility. It can be used

with a wide variety of magnetic sensors thanks to the

special design which has two input pins from the

pickup ; the first is the zero crossing detector for the

ignition command and the second pin is used to cal-

culate the dwell time. Moreover another pin is used

to adapt the L484 to various pickup types.

Other features of the device include darlington over-

voltage protection, dump protection, a supply volt-

age range of 6-28 V.

DIP16

ORDERING NUMBERS : L484 (DIP16)

L484D1 (SO16)

SO16

BLOCK DIAGRAM

1/11