Texas Instruments TPS92691EVM-001 SEPIC LED Driver Evaluation Board

Texas Instruments TPS92691EVM-001 SEPIC LED Driver Evaluation Board is a fully assembled and tested SEPIC LED driver designed to power a single string of series-connected LEDs. Accurate closed-loop LED current regulation is achieved using a low-offset rail-to-rail current sense amplifier. This amplifier is compatible with either high-side or low-side current-sensing implementations. DC LED current setpoint can be varied over a 15:1 ratio using high-impedance analog adjust (IADJ) input. An integrated gate driver circuit and proprietary PWM dimming logic are incorporated to enable external series FET PWM dimming with a greater than 100:1 dimming ratio.

Features

A versatile LED driver capable of driving a string of 1 to 20 series-connected white LEDs
Wide 4.5V to 40V input voltage range supports automotive start-stop and load dump transients up to 65V maximum
Compatible with high-side and low-side current sense resistor positions

Simple circuit interface to set LED current reference and PWM duty-cycle
Instantaneous current monitor output that facilitates LED fault detection and mitigation