A 450V linear controller, designed to simplify current regulation of high voltage LED strings, has been introduced by Texas Instruments.
The TPS92410 integrates a multiplier and tunable phase dimmer detection, as well as analogue dimming inputs and drive circuit protection functions to ease design of downlights, fixtures and lamps powered from an offline AC or conventional DC power source. Operating over a 9.5 to 450V input voltage range, the controller functions as a standalone high voltage LED string current regulator or pairs with TI's TPS92411 floating switch to provide power in mains AC linear direct drive applications. Together, the TPS92410 and TPS92411 feature driver and LED circuit protection while providing an inductor free, low LED current ripple lighting solution. The TPS92410 includes an analogue dimming input pin with LED shutoff to provide easy light intensity control in intelligent, MCU based light fixtures using the ultra low power MSP430F5172 microcontroller or SimpleLink ZigBee CC2530 wireless MCU.