Multi-topology LED controller with PWM dimming and seamless high/low intensity mode conversion

The A80803 is a switching mode constant-current controller for high-power LED automotive lighting applications that solves many common pain points for headlamp designers, making it easier for headlamp designers to achieve high-performance, low-cost, and compact optimal design. The A80803's multi-topology single-ended controller design is combined with wide input/output voltage capabilities to provide a universal solution for a variety of applications and/or multiple leds. SPI - based control or EEPROM - based programming options for independent operation further extend the application potential.

The A80803 uses a multi-topology, single-ended controller design, combined with a wide range of input/output voltage capabilities, to provide a universal solution for a variety of application scenarios and LED quantities. The A80803 also features superior EMC features and friendly thermal management capabilities, with an integrated FET driver for PWM control and a controlled conversion rate driver for high/low intensity conversion to minimize over/undershoot effects. SPI - based control or EEPROM - based line-end programming options for independent operation further extend the A80803's application potential.

Key characteristics

● The A80803 includes the following market-leading features that help simplify headlamp design and improve occupant safety.

● Multi-topology far-light/near-light switching without the need for a second LED driver IC

● Unique slew-control feature to minimize LED overshoot and undershoot when converting between high-beam and near-light fields

● Two configuration options, one is a factory-programmed EEPROM, which eliminates the need for a native microcontroller, the other is a control and status register SPI interface for software control

● For ASIL's extensive diagnostic capabilities, features two programmable fault pins and can be reported via SPI

● A variety of methods can be used to simulate LED setting/controlling base strength, thermal foldback through negative temperature coefficient (NTC), or use different leds for the same design

● A variety of PWM LED control methods, through internal PWM signal (independent mode) or external PWM signal for EN/PWM pin direct PWM control (MCU mode)