Integrated Smart Ignition Coil Driver

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Overview

The FGBS3040E1_F085 is designed to directly drive an ignition coil and control the current and spark event of the coil. The coil current is controlled via the input/diagnostic pin. When the input is driven high, the IGBT is enabled to start charging the coil. The FGBS3040E1_F085 will sink a current (IIN1) into the input to denote this condition. When the collector current increases to Icthr the input current into the FGBS3040E1_F085 is reduced to IIN2 indicating the collector current has reached this level. An input filter suppresses input signals of less then 13 µsec in duration. A Max Dwell timer is included in the FGBS3040E1_F085 which will turn off the IGBT if the input stays active for longer then the programmed time. This time interval can be modified through an external capacitor. When the Max Dwell timer is exceeded, the FGBS3040E1_F085 will enter a Soft-Shut-Down mode (SSD) slowly dropping the collector current thereby discharging the coil such as to inhibit a spark event. Once the soft shutdown operation has started, any transitions on the input signal are ignored until after completion of the soft shutdown function. The FGBS3040E1_F085 will also limit the collector current of the IGBT to Ic(lim) during charging.

  • 400V 300mJ N Channel Ignition IGBT
  • Control Input buffering
  • Input spike filter of typical 13us
  • Operation from Ignition or Battery line
  • Ground shift tolerance +/- 1.5V
  • Programmable maximum dwell time
  • Current programmable bidirectional Input/Diagnostic pin
  • Collector Current limit typical 16.5A
  • Soft Shutdown of Collector Current after Max Dwell

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FGBS3040E1-F085

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D2PAK-7 / TO-263-7

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