450-V cntrl simplifies offline LED lighting design

The TPS92410 450-V linear controller simplifies current regulation of high-voltage LED strings. The controller integrates a multiplier and tunable phase dimmer detection, analog dimming inputs, and drive circuit protection functions. It helps ease design of downlights, fixtures and lamps powered from an offline ac or conventional dc power source.

The controller operates from  9.5- to 450-V input and functions as a standalone high-voltage LED string current regulator, or pairs with the 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 analog dimming input pin with LED shutoff to provide light intensity control in intelligent, MCU-based light fixtures using the MSP430F5172 microcontroller or the SimpleLink ZigBee CC2530 wireless MCU.