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Hall Effect Pickup Ignition Control IC
The LD497 (analog L497) is an integrated electronic ignition controller for breaker less 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 LD497 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.
Direct driving of the external power darlington
Coil current charging angle(dwell) control
Programme coil current peak limitation
Programmable dwell recovery time when 94 %
nominal current not reached
Packaging : LD497 chip is sealed with standard DIP16 and SOP16
Factory Outlet, spot stock. Good reliability, quality assurance.
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