LT4761 Automotive Direction Indicator Flasher IC

LT4761 Automotive Direction Indicator Flasher IC

Product Details:


Product Description

Automotive Direction Indicator IC


  • The bipolar integrated circuit LT4761 is used in relay-controlled automotive flashers where a high-level EMC is required.
  • Lamp outage is indicated by frequency doubling during hazard warning as well as direction mode.




Tubed, Reeled, Pb-free


Tubed, Pb-free


Features Ordering Information

  • Quiescent current <5mA
  • Wide operating voltage, up to 33V
  • Strong anti-interference ability



Functional Description

  • The circuit is directly coupled by an external RC circuit that input triangular wave oscillation signal, through a controlled oscillator, current amplification, the output drive capability with a strong square wave pulse.
  • When the sampling resistor Rs monitoring to reduce the half of lamp load, the corresponding voltage comparator action, causing changes in the oscillation frequency doubles.
  • When the supply voltage produces a transient pulse (±100V), the protection circuit automatically turns on shunting and clamping limit, to interference protection purposes.
  • The relay drive current output of the circuit is 120-200mA.


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