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A80803 Datasheet Multi-Topology Synchronous LED Controller

Manufacturer: Allegro MicroSystems

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General Description

The A80803 is a switch-mode, constant-current DC/DC controller for high-power LED automotive lighting applications.

The controller is based on a programmable fixed frequency, peak current mode control architecture and can be configured in multiple different switching topologies to suit different application requirements.

Both a low-side and high-side gate driver are included to control the external power MOSFETs.

Overview

A80803 Multi-Topology Synchronous LED Controller with PWM Dimming and High/Low Intensity.

Key Features

  • Wide 5 to 37 V input voltage range.
  • 40 V absolute maximum for load dump.
  • 4.5 V UVLO falling for idle stop.
  • Wide output voltage, up to 70 V OVP rating.
  • Single-ended topology controller with internal gate drivers for low-side and high-side external MOSFETs.
  • Topology options including boost and buck-boost.
  • Unique topology changeover option for high/low beam.
  • Unique slew rate control to minimize current overshoot/undershoot dur.

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