Two-channel driver IC controls automotive interior light

March 14, 2013 // By Christoph Hammerschmidt
Map and dome lighting, glove box, vanity mirror, trunk lights and puddle lamps in doors - there are plenty of application fields for LEDs in the automotive interior. Chipmaker Allegro MicroSystems now has added a new LED driver IC to complement their existing automotive qualified LED driver IC portfolio. The A6269 is a linear, programmable current regulator providing up to 200 mA from each of two outputs to drive arrays of high brightness LEDs.

The regulated LED current from each output is set by a single reference resistor. Current matching in each string is achieved without the need of ballast resistors. Dual control pins are available for both switch (on/off) and master control (on/off/dim up/dim down) signals. Outputs can be connected in parallel or left unused as required. Short detection is provided to protect the LEDs and the device during a short-to-ground at any LED output pin. The output will automatically resume the regulated current when the short is removed. A temperature monitor is included to reduce the LED drive current if the chip temperature exceeds an adjustable thermal threshold.

The A6269KLJTR-T is available in an 8-pin narrow SOIC package with exposed pad for enhanced thermal performance.

For more information visit http://www.allegromicro.com/en/Products/Regulators-And-Lighting/LED-Drivers-For-Lighting/A6269.aspx