Automotive-Grade Switching Regulator Drives High-Power LEDs

Allegro MicroSystems
November 16, 2016

The AEC-Q100-qualified A6217switching regulator provides constant-current output to drive high-power LEDs. The device integrates a high-side N-channel DMOS switch for dc/dc step- down (buck) conversion. A true average current is output using a cycle-by-cycle, controlled on-time method. Output current is user-selectable by an external current sense resistor. Output voltage automatically adjusts to drive various numbers of LEDs in a single string. LED dimming is accomplished by logic-level or chopped-battery PWM, as well as analog dimming. The A6217 also features switching frequency dithering for reduced EMI signature. The A6217 is an enhanced version of the popular A6213 and is available in a pinout-equivalent eSOIC-8 package (LJ), or a more compact 3 mm x 3 mm wettable flank DFN-10 (EJ). Both packages have an exposed pad for enhanced thermal dissipation, and are lead (Pb) free with 100% matte-tin lead-frame plating. For a datasheet, click

Allegro MicroSystems
Worcester, MA


Company Allegro MicroSystems
Country United States (USA)