(China (Mainland))
Product Summary
The L497 is an integrated electronic ignition controller for breakerless ignition systems using Hall effect sensors. The device drives an NPN external darlington to control the coil current providing the required stored energy with low dissipation. A special feature of the L497 is the programmable time for the recovery of the correct dwell ratio Td/T when the coil peak current fails to reach 94 % of the nominal value. In this way only one spark may have an energy less than 94 % of the nominal one during fast acceleration or cold starts.
Parametrics
Absolute maximum ratings: (1)D.C. Supply current, I3: 200mA; (2)Transient Supply Current (tf fall time constant = 100ms), I3: 800mA; (3)Supply Voltage, V3: Int. Limited to Vz3; (4)RPM Voltage, V6: 28V; (5)D.C. Driver Collector Current, I16: 300mA; (6)Pulse t <= 3ms, I16: 600mA; (7)Driver Collector Voltage, V16: 28V; (8)Auxiliary Zener Current, I7: 40mA; (9)D.C. Overvoltage Zener Current, Pulse tfall = 300ms, I15: 15mA; (10)D.C. Overvoltage Zener Current, trep Repetition Time > = 3ms, I15: 35mA; (11)Reverse Battery Voltage if Application Circuit of Fig. 4 is used, VR: –16V; (12)Junction and StorageTemperature Range, Tj, Tstg: – 55 to 150℃; (13)Power Dissipation, at Taluminia = 90 ℃ for SO-16, Ptot: 1.2W; (14)Power Dissipation, Tamb = 90 ℃ for DIP-16, Ptot: 0.65W.
Features
Features: (1)direct driving of the external; (2)power darlington coil current charging angle (dwell); (3)control programme coil current peak limita; (4)tion programmable dwell recovery time when 94 % nominal current not reached rpm output; (5)permanent conduction protection overvoltage protection for exter nal darlington; (6)internal supply zener reverse battery protection.
Diagrams
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 L497 |
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Data Sheet |
Negotiable |
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Switching Converters, Regulators & Controllers 3.3 to 50V Step-Down |
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Switching Converters, Regulators & Controllers 3.3 to 50V Step-Down |
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Switching Converters, Regulators & Controllers 5.1 to 40V 2.0 Amp |
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L4972AD |
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Switching Converters, Regulators & Controllers 5.1 to 40V 2.0 Amp |
Data Sheet |
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L4972AD013TR |
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Switching Converters, Regulators & Controllers 5.1 to 40V 2.0 Amp |
Data Sheet |
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