High-power LED driver suits automotive lighting

The TPS92690 high-power, multi-topology dc/dc LED driver features an adjustable switching frequency and current sense threshold that provides low EMI for automotive headlamps, fog lights and general-purpose area lighting, and is offered in AEC-Q100-qualified automotive or commercial grades. It is an N-channel MOSFET controller with low-side current sense from 50 to 500 mV to support step-up or step-up/step-down (SEPIC, Cuk, flyback) LED driver topologies, and has a 4.5 to 75.0-V input voltage range.

The dc/dc LED controller includes adjustable switching frequency (up to 2 MHz) and current sense threshold to allow designers to optimize LED drive electronics for small size, high efficiency, or a balance of both. Separate PWM and analog inputs interface with common dimming control methods to adjust LED current or implement thermal foldback. An internal oscillator sets the switching frequency of the converter, but can be overdriven by an external clock for synchronizing switching frequencies with other converters in a design.