A6260 High Brightness LED Current Regulator Features and Benefits Description AEC Q-100 qualified The A6260 is a linear, programmable current regulator LED drive current up to 350 mA providing up to 350 mA for driving high-brightness LEDs. 6 to 40 V supply The LED current, accurate to 4%, is set by a single low-power Reverse battery protection sense resistor. Driving LEDs with constant current ensures Low drop-out voltage safe operation with maximum possible light output. LED short circuit and thermal protection For automotive applications, optimum performance is 10 A maximum shutdown current achieved when driving between 1 and 3 LEDs at cur- PWM dimming control input rents up to 350 mA. Current slew rate limiting The low dropout voltage of the A6260 allows a single white LED to be driven safely, at full current, with a supply voltage down to 6 V. An enable input allows PWM dimming and can be used to Package: 8-pin SOICN with exposed enable low-current sleep mode. The rate of change of current thermal pad (suffix LJ) during PWM switching is limited to reduce EMI. Overcurrent detection is provided to protect the LEDs and the A6260 during short-to-supply or short-to-ground at any LED terminal. The integrated temperature monitor can be used to reduce the LED drive current if the chip temperature exceeds the thermal limit. The device is available in an 8-pin SOIC package with exposed Not to scale thermal pad (suffix LJ). The device is lead (Pb) free with 100% matte-tin leadframe plating. Not to scale Typical Application 7 to 20 V (14 V min, 40 V max) VIN LA PWM Dimming and EN On-Off Control A6260 Automotive 12 V Power Net THTH LC LSS SENSE GND 6260-DS, Rev. 7 DRAFT sept10 2013A6260 High Brightness LED Current Regulator Selection Guide Ambient Temperature, T A Part Number Packing (C) A6260KLJTR-T 3000 pieces per reel 40 to 125 A6260SLJTR-T 3000 pieces per reel 20 to 85 Absolute Maximum Ratings* Characteristic Symbol Notes Rating Units Load Supply Voltage V 14 to 40 V IN EN Pin Voltage V 14 to 40 V EN LA and LC Pins Voltage V 0.3 to 40 V Lx LSS Pin Voltage V 0.3 to 0.3 V LSS SENSE Pin Voltage V 0.3 to 0.3 V SENSE THTH Pin Voltage V 0.3 to 7 V THTH Range K 40 to 125 C Ambient Operating Temperature Range T A Range S 20 to 85 C Junction Operating Temperature Range T 40 to 150 C J Storage Temperature Range T 55 to 150 C stg ESD Rating, Human Body Model AEC-Q100-002, all pins 2000 V ESD Rating, Charged Device Model AEC-Q100-011, all pins 1050 V *With respect to GND. Thermal Characteristics*may require derating at maximum conditions, see application section for optimization Characteristic Symbol Test Conditions* Value Unit On 4-layer PCB based on JEDEC standard 35 C/W Package Thermal Resistance R JA (Junction to Ambient) 2 On 2-layer generic test PCB with 0.8 in. of copper area each side 62 C/W Package Thermal Resistance R 2 C/W JP (Junction to Pad) *Additional thermal information available on the Allegro website. Allegro MicroSystems, LLC 2 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000 www.allegromicro.com