LED Drivers for Backlighting

Allegro offers a variety of highly integrated LED drivers for backlighting to match your requirements for input voltage range, number of LEDs per string, number of strings and LED current. Our LED drivers lead the industry in reliability and robustness, with AEC-Q100 Grade 0 qualification, operation to 150°C, protection against pin-to-pin shorts and open/shorted external components, and built-in fault diagnostic capabilities.

Patented control technologies enable industry-leading LED dimming range performance as well as compliance to challenging input voltage transients, such as automotive idle-stop and load dump. Fast/controlled startup allows customers to minimize time-to-light, not just as a convenience for infotainment applications but also for safety in concert with back-up cameras.

We also provide proven EMC reference designs tested in our in-house EMC laboratory to ensure successful and rapid EMC compliance. Plus, our field is well trained and ready to support your projects at the local level. 

Featured Products

ALT80600 Package Image

ALT80600

LED Driver with Pre-Emptive Boost for Ultra-High Dimming Ratio and Low Output Ripple
Allegro 24-contact QFN ES Package

A80601-4

High Power LED Driver with Pre-Emptive Boost for Ultra-High Dimming Ratio and Low Output Ripple
Allegro 24-contact QFN ES Package

A80602-5

High Power LED Driver with Pre-Emptive Boost for Ultra-High Dimming Ratio and Low Output Ripple

Documentation & Resources

Design Considerations in Selection of Converter Configuration for Automotive LED Headlight Applications
Application Note

Design Considerations in Selection of Converter Configuration for Automotive LED Headlight Applications

This application note discusses LED headlights for two-wheelers, passenger vehicles, commercial vehicles, and mild hybrid vehicles, and explores battery voltage and power requirements for the headlights used in these vehicles.
Overcoming Long Term Reliability Challenges in Two-Wheeler Rear Combination Lamps
Technical Article

Overcoming Long Term Reliability Challenges in Two-Wheeler Rear Combination Lamps

P0240: Using Allegro's LED drivers with integrated noncontact Hall-effect switches instead of mechanical switches can prevent corrosion and improve the reliability of LED systems in RCL applications.
Two Wheeler Stop/Tail LED Driver
Application Note

Two Wheeler Stop/Tail LED Driver

AN296207 - In two-wheeler stop and tail light applications, particularly those that use a Rear Combination Lamp (RCL), OEMs use LEDs instead of incandescent bulbs to ensure longer application life.
Pre-Emptive Boost Control Improves LED Driver Performance
Technical Article

Pre-Emptive Boost Control Improves LED Driver Performance

This article demonstrates the PWM dimming benefits achieved by PEB when compared to the behavior of conventional LED driver control methods.
Buck Controller Implementation Using A80803 with Slew-Rate Control for 48 V Automotive LED Headlight Applications
Application Note

Buck Controller Implementation Using A80803 with Slew-Rate Control for 48 V Automotive LED Headlight Applications

The proliferation of light-emitting diode (LED) drivers in various automotive applications over the past decade has been driven by a need for efficient lighting and aesthetics.
High Voltage Buck-Boost LED Headlamp Driver Using Allegro A6271-1
Application Note

High Voltage Buck-Boost LED Headlamp Driver Using Allegro A6271-1

This application note discusses the features and application of the Allegro A6271-1 switching LED controller in automotive high-power applications when driving a high number of LEDs.

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