L484 Datasheet, PDF (1/11 Pages) STMicroelectronics – MAGNETIC PICKUP IGNITION CONTROLLER

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L484
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)
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.
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
BLOCK DIAGRAM
DIP16
SO16
ORDERING NUMBERS : L484 (DIP16)
L484D1 (SO16)
September 2003
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