L484D1

L484 MAGNETIC PICKUP IGNITION CONTROLLER . . . . . . . . . DIRECT DRIVING OF THE EXTERNAL DARLINGTON OPERATES WITH A WIDE RANGE OF MAGNETIC 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 PROTECTION 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 calculate the dwell time. Moreover another pin is used to adapt the L484 to various pickup types. Other features of the device include darlington overvoltage protection, dump protection, a supply voltage range of 6-28 V. DESCRIPTION The L484 is an integrated circuit designed for use with an NPN darlington in breakerless ignition systems 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 magneticsensors thanks to the BLOCK DIAGRAM DIP16 SO16 ORDERING NUMBERS : L484 (DIP16) L484D1 (SO16) November 1991 1/11 L484 ABSOLUTE MAXIMUM RATINGS Symbol VR VD Ptot Tj, Tstg Reverse Battery Voltage Dump Voltage Power Dissipation at Tamb = 90°C Junction and Storage Temperature Range Parameter Value – 14 100 0.75 – 55 to 150 Unit V V W °C PIN CONNECTION THERMAL DATA Symbol Rth j-amb R th j-al Parameter Thermal Resistance Junction-ambient...