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A6274 - Linear Current Regulator/Controller

Datasheet Summary

Description

The A6274 and A6284 are programmable linear current regulator ICs for driving automotive LED arrays.

The LED current is programmed by external resistors.

These devices sink up to 60 mA (A6274) or 120 mA (A6284), from each of six LED pins, to drive strings of high-brightness LEDs.

Features

  • Six LED current sinks rated up to 60 mA (A6274) or 120 mA (A6284).
  • Total LED drive current.
  • up to 360 mA or 720 mA.
  • Wide input voltage range of 5 to 42 V for start/stop, cold- crank, and load-dump requirements.
  • Low-dropout voltage.
  • drives two series WLEDs from 7 V input.
  • Gate driver for external ballast P-MOSFET.
  • LEDs combined in two groups with separate ENx and ISETx.
  • LED current level set by external reference resist.

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Datasheet preview – A6274

Datasheet Details

Part number A6274
Manufacturer Allegro MicroSystems
File Size 920.72 KB
Description Linear Current Regulator/Controller
Datasheet download datasheet A6274 Datasheet
Additional preview pages of the A6274 datasheet.

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Full PDF Text Transcription

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A6274, A6274-1 A6284, A6284-1 Linear Current Regulator and Controller for Automotive LED Arrays FEATURES AND BENEFITS • Six LED current sinks rated up to 60 mA (A6274) or 120 mA (A6284) • Total LED drive current—up to 360 mA or 720 mA • Wide input voltage range of 5 to 42 V for start/stop, cold- crank, and load-dump requirements • Low-dropout voltage—drives two series WLEDs from 7 V input • Gate driver for external ballast P-MOSFET • LEDs combined in two groups with separate ENx and ISETx • LED current level set by external reference resistors • Internal or external PWM dimming • Controlled output drivers slew during PWM for lower EMI • Fault detection features: LED string open, LED pin short-to-ground, single LED short, VOUT short-toground, VIN overvoltage, and thermal protection • Input
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