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 (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. This pin sets the dwell time, i.e. the max negative pickup voltage value starting from which the device can drive the current into the coil. The real dwell time will be a function of the dwell control logic. Increasing the resistor R11 the maximum conduction time increases. The max input current foreseen is 2mA.
STMicroelectronics
