TI introduces dual mode off-line controller for non-dimmable LED lighting

The TPS92310 is the first in a family of primary side, regulated controllers with PFC.  In May, TI will be offering the TPS92311 with similar features and an integrated, 600V power FET with avalanche energy capability, further reducing solution size and component count. Both devices will join TI’s portfolio of off-line LED lighting controllers that include the National LM3445, the industry’s first TRIAC dimmable LED driver with both full-range and flicker-free dimming.

The new device’s AC input voltage supports all common line voltages (100V, 120V, 230V, 240V, 277V), including U.S. commercial.

True primary side sensing and regulation provides accurate LED current regulation, eliminating optocoupler, secondary error amplifier and associated passive components as a result the bill of materials is reduced by 14 percent or more compared to today’s solutions.

Select from dual operating modes: adaptive constant on-time (COT) provides inherent power factor correction with no external components. PFC reduces the EMI signature to ensure regulatory approval; while peak current control provides low LED current ripple to minimize stroboscopic effects.

A cycle-by-cycle current limit, over/under voltage protection and thermal shutdown protect the LED driver and user against fault and abnormal operating conditions.

Texas Instruments

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