DESCRIPTION

The L497is 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.

■ DIRECT DRIVING OF THE EXTERNAL POWER DARLINGTON

■ COIL CURRENT CHARGING ANGLE (dwell) CONTROL

■ PROGRAMMECOIL CURRENT PEAKLIMITATION

■ PROGRAMMABLE DWELL RECOVERY TIME WHEN 94 NOMINAL CURRENT NOT REACHED

■ RPM OUTPUT

■ PERMANENT CONDUCTION PROTECTION

■ OVERVOLTAGE PROTECTION FOR EXTERNAL DARLINGTON

■ INTERNAL SUPPLY ZENER

■ REVERSE BATTERY PROTECTION

L497D1属于集成电路（IC） > 电源管理 - 专用。意法半导体（ST）集团制造生产的L497D1电源管理 - 专用专用型电源管理集成电路 (PMIC) 用于电源的控制或操作，适合特定或小范围的目标应用，例如汽车气囊管理、电容器组平衡、AC 公共电力监控、存储器总线端接、接地故障检测、能量收集、小型引擎管理、处理器或芯片集专用电压调节、负载突降保护、触觉驱动器、热电制冷器控制等。