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A6271 - Automotive High-Current LED Controller

General Description

The A6271 is a DC-DC converter controller, providing a programmable constant-current output for driving high-power LEDs in series.

The controller is based on a programmable fixed-frequency, peak current-mode control architecture.

Key Features

  • Automotive AEC-Q100 qualified.
  • Constant-current LED drive.
  • 4.2 to 50 V supply.
  • 53.3 V maximum LED string voltage.
  • Boost, buck-boost, and buck switching converters.
  • Programmable switching frequency 70 to 700 kHz.
  • PWM-controlled PMOS driver allows accurate LED current control at low duty cycles.
  • Dimming via external PWM, internal PWM and/or analog dimming.
  • Frequency dither scheme for effective spread spectrum to redu.

📥 Download Datasheet

Datasheet Details

Part number A6271
Manufacturer Allegro MicroSystems
File Size 0.97 MB
Description Automotive High-Current LED Controller
Datasheet download datasheet A6271 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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A6271 Automotive High-Current LED Controller FEATURES AND BENEFITS • Automotive AEC-Q100 qualified • Constant-current LED drive • 4.2 to 50 V supply • 53.3 V maximum LED string voltage • Boost, buck-boost, and buck switching converters • Programmable switching frequency 70 to 700 kHz • PWM-controlled PMOS driver allows accurate LED current control at low duty cycles • Dimming via external PWM, internal PWM and/or analog dimming • Frequency dither scheme for effective spread spectrum to reduce EMI • Comprehensive fault protection and fault flag PACKAGE: 16-Pin eTSSOP (LP) with Exposed Thermal Pad DESCRIPTION The A6271 is a DC-DC converter controller, providing a programmable constant-current output for driving high-power LEDs in series.