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L482D1013TR
HALL-EFFECT PICKUP IGNITION CONTROLLER
L482July 2003
HALL–EFFECT PICKUP IGNITION CONTROLLER DIRECT DRIVING OF THE EXTERNAL
POWER DARLINGTON. COIL CURRENT CHARGING ANGLE (DWELL)
CONTROL. COIL CURRENT PEAK VALUE LIMITATION. CONTINUOUS COIL CURRENT PROTECTION. CONDUCTION AND DESATURATION TIME
OUTPUT SIGNALS. PERMANENT CONDUCTION PROTECTION
RESET OUTPUT SIGNAL. OVERVOLTAGE PROTECTION FOR EXTER-
NAL DARLINGTON. LOAD DUMP PROTECTION
DESCRIPTIONThe L482 is an integrated circuit designed for use
with an NPN darlington in breakerless ignition sys-
tems with hall-effect pickup sensors and high energy
ignition coils.
It controls the energy stored in the ignition coil and
the desaturation time of the external darlington to
limit the power dissipation.
PIN CONNECTIONS (top views)The L482 is also particularly suitable for use as ig-
nition control and driving stage in more sophisti-
cated car electronic systems which employ
microprocessor circuits.
1/11
BLOCK DIAGRAM(*) Thermal resistance junction-aluminia with the device soldered on the middle of an aluminia supporting substrate measuring 15 x 20mm ;
0.65mm thickness with infinite heatsink.
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
L4822/11
PIN FUNCTIONS (refer to fig. 3 for DIP16 package)
L4823/11
(*) These pins refer only to the DIP package type.
For the SO 16 version the permanent conduction reset output signal is not available and the pin 9 becomes the current sensing input. Pin 10
replaces the pin 11 function, pin 11 becomes the power supply input and pin 12 is used as the signal ground.
ELECTRICAL CHARACTERISTICS (VS = 14 V, – 40°C ≤ Tj ≤ 125°C referred to application circuit of
figure 3 regarding DIP-16 package version)
PIN FUNCTIONS (continued)
L4824/11
ELECTRICAL CHARACTERISTICS (Continued)
Figure 1 : Main Waveforms.
APPLICATION INFORMATION
L4825/11
Figure 2 : Low Frequency Condition and Permanent Conduction Protection.
Figure 3 : Application circuit (DIP–16).
L4826/11
