Dimmable, multi-topology dc-dc constant-current controller delivers low-side current sense

TEXAS INSTRUMENTS TPS92690 is an N-channel MOSFET controller with low-side current sense designed to support step-up (boost) or step-up/step-down (SEPIC, Cuk, flyback) LED driver topologies. The high-power, multi-topology dc-dc LED driver with adjustable switching frequency and current sense threshold provides design flexibility and low electro-magnetic interference (EMI). Device provides significant flexibility to optimize systems. Separate pulse-width modulation (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.

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