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L484 Datasheet

  • L484

  • MAGNETIC PICKUP IGNITION CONTROLLER

  • 11頁(yè)

  • STMICROELECTRONICS   STMICROELECTRONICS

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L484
MAGNETIC PICKUP IGNITION CONTROLLER
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DIRECT DRIVING OF THE EXTERNAL DAR-
LINGTON
OPERATES WITH A WIDE RANGE OF MA-
GNETIC 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 pic-
kup ; 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 sy-
stems with magnetic pickup sensors and high ener-
gy ignition coils.
A key feature of the L484 is flexibility. It can be used
with a wide variety of magneticsensors thanks to the
BLOCK DIAGRAM
DIP16
SO16
ORDERING NUMBERS :
L484 (DIP16)
L484D1 (SO16)
November 1991
1/11

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