New Automotive-Grade LED Drivers with PWM Control and Multi-Topology Conversion Designed for Advanced Driver Assistance System Applications

Published  November 8, 2021   0
L Lakshita
Allegro's Automotive-Grade LED Drivers

Allegro MicroSystems, Inc. has expanded its automotive lighting portfolio by introducing two new offerings for advanced driver assistance system (ADAS) applications. Both of these products help in reducing the number of ICs required to create safety-enhanced automotive lighting systems, enabling higher performance and more compact designs at lower system cost. The new switch-mode, constant-current controller A80803 leverages multi-topology conversion and patented IP to enable smooth high/low/high beam transitions in a single integrated circuit (IC) while new A80804 linear LED driver provides high power for automotive lighting applications through multiple, independently-configurable channels.

The A80803 automotive-grade LED controller is designed for high-power LED automotive lighting applications and includes a local 5V/50mA linear regulator for low power uC or external circuitry. The multi-topology single-ended controller design, combined with wide input/output voltage capability, provides a universal solution for a wide variety of use cases and/or number of LEDs. Moreover, this controller features SPI-based control or EEPROM-based end-of-line programming for standalone operation.

The A80804 is a four-channel linear driver designed for applications such as DRL/position and stop/tail lights and help lower total system costs by reducing the number of ICs required to meet customer needs. This LED driver offers multiple analog and PWM dimming methods, dual brightness mode operation, and is configurable without the need for a microcontroller. Moreover, it gives lighting designers increased design flexibility for popular features such as sequential turn signals, animation effects, and theater-style transitions.


Both the products are now available in a thermally enhanced 32-pin 5mm × 5mm QFN package with wettable flank.