Allegro Microsystems Introduces Dimmable Buck Regulator LED Driver for Automotive Lighting

Allegro MicroSystems introduces a new automotive, AEC-Q100 qualified single IC switching regulator that provides constant-current output to drive high-power LEDs. Allegro’s A6217 integrates a high-side N-channel DMOS switch for DC-to-DC step- down (buck) conversion. A true average current is output using a cycle-by-cycle, controlled on-time method. This new LED driver is targeted at the automotive lighting market and includes the following key applications: daytime running lights, front and rear fog lights, turn/stop lights, map lights, and dimmable interior lights.

Allegro MicroSystems launches its latest A6217 LED driver for automotive lighting applications. (Allegro MicroSystems/LEDinside)

Output current is user-selectable by an external current sense resistor. Output voltage is automatically adjusted to drive various numbers of LEDs in a single string, ensuring optimal system efficiency. LED dimming can be accomplished by logic-level or "chopped battery" PWM, as well as Analog dimming capability. 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 3x3mm wettable flank DFN-10 (EJ). Both packages have an exposed pad for enhanced thermal dissipation, and are lead (Pb) free with 100% matte-tin leadframe plating.

Disclaimers of Warranties
1. The website does not warrant the following:
1.1 The services from the website meets your requirement;
1.2 The accuracy, completeness, or timeliness of the service;
1.3 The accuracy, reliability of conclusions drawn from using the service;
1.4 The accuracy, completeness, or timeliness, or security of any information that you download from the website
2. The services provided by the website is intended for your reference only. The website shall be not be responsible for investment decisions, damages, or other losses resulting from use of the website or the information contained therein<

Proprietary Rights
You may not reproduce, modify, create derivative works from, display, perform, publish, distribute, disseminate, broadcast or circulate to any third party, any materials contained on the services without the express prior written consent of the website or its legal owner.