Dual buck LED controller offers SPI interface, analog and PWM dimming

The Texas Instruments TPS92518 family of parts are dual channel buck LED current controllers with an SPI communications interface. The serial communication interface affords a singular communication path for multichannel and platform lighting driver module applications. The device uses a quasi-hysteretic control method that supports switching frequencies ranging from 1kHz to 2MHz. This control method allows 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 various load configurations that can be quickly reconfigured for future LED driver design requirements. The device has an input range up to 42V. The TPS92518HV is a high-voltage option with an input range up to 65V.