Allegro MicroSystems Inc. Automotive High Current Led Controller A6271KLPTR-T-1

The A6271KLPTR-T-1 is an automotive high-current LED controller from Allegro MicroSystems, designed for driving high-power LEDs in series. It is AEC-Q100 qualified and operates with a supply voltage range of 4.2 to 50 V, supporting a maximum LED string voltage of 53.3 V. The controller can be configured in various switching topologies, including boost, buck-boost, buck, and SEPIC, making it versatile for different applications. This device features a programmable switching frequency from 70 kHz to 700 kHz and allows for precise LED current control through a PWM-controlled PMOS driver, which is effective even at low duty cycles. Dimming options include external PWM, internal PWM, and analog dimming, providing flexibility in LED brightness control. The A6271KLPTR-T-1 also incorporates a frequency dither scheme to minimize electromagnetic interference (EMI) and includes comprehensive fault protection mechanisms to safeguard both the IC and the LED system. The product is packaged in a 16-pin eTSSOP with an exposed thermal pad, facilitating efficient thermal management. It is suitable for various automotive lighting applications, such as fog lights, reversing lights, daytime running lights, position lights, and headlights.