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A80803

Allegro
Part Number A80803
Manufacturer Allegro
Description Multi-Topology Synchronous LED Controller
Published Dec 6, 2023
Detailed Description A80803 Multi-Topology Synchronous LED Controller with PWM Dimming and High/Low Intensity Modes FEATURES AND BENEFITS • ...
Datasheet PDF File A80803 PDF File

A80803
A80803


Overview
A80803 Multi-Topology Synchronous LED Controller with PWM Dimming and High/Low Intensity Modes FEATURES AND BENEFITS • 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 during high/low transition • Complementary gate drivers for high/low beam applications • Options for SPI control or programmable EEPROM for design parameters, eliminates need for local microcontroller • Internal PWM generator and driver to control external dimming MOSFET • Fixed frequency operation with programmable dithering for EMC mitigation • Constant current regulation • Extensive fault detection and reporting through SPI or hardwired fault signals • Analog dimming options for LED binning, input voltage foldback, and temperature foldback via NTC • 5 V / 50 mA linear regulator to power external circuitry • Four programmable current settings to adapt to LED binning 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.
Two additional gate drivers are integrated to enable/disable part of the LED string to simplify high/low beam applications.
Diagnostics can be reported through SPI or via the two fault pins.
The SPI interface can also be used to control many configuration options of the A80803.
Alternatively, these options can be factory-programmed and stor...


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