STMicroelectronics L484D1
the L484 to various pickup types.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 L484ABSOLUTE 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 (DIP16) Thermal Resistance Junction-alumina (SO16 ) Max Max Value 80 50 Unit °C/W °C/W 2/11 L484 PIN FUNCTIONS (refer to fig. 2) N° 1 Name CURRENT SENSING INPUT Function Connection for Coil Current Limitation. The current is measured on the sense resistor R SENS and divided on R1/R2. The current limitation value is given by : R1 + R2 ISENS = R SENS R2 Magnetic Pickup Signal Input.