Automotive dual buck LED controller with SPI interface, analog and PWM dimming

Texas Instruments’ TPS92518-Q1 family of parts are dual channel buck LED current controllers with a SPI communications interface. The serial communication interface provides a singular communication path for multichannel and platform lighting driver module (LDM) applications. The uses a quasi-hysteretic control method that supports switching frequencies ranging from 1kHz to 2MHz. This control method enables superior, high frequency shunt FET dimming and also handles the demanding dynamic loads of adaptive LED matrix based headlamp systems. Software programmable SPI set points (Precision Peak Current, Controlled Off-Time and Output Voltage Sense) enables designers to develop a single LED driver solution for multiple load configurations that can be quickly reconfigured for future LED driver design requirements. The device has an input range up to 42V. It is a high-voltage option with an input range up to 65V.