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LED light designs made simple with 450V linear controller

Posted: 06 Oct 2014     Print Version  Bookmark and Share

Keywords:Texas Instruments  LED  controller  ZigBee  wireless MCU 

Texas Instruments (TI) has unveiled a 450V linear controller that claims to ease current regulation of high-voltage LED strings. The TPS92410 features a multiplier and tunable phase dimmer detection, as well as analogue dimming inputs and drive circuit protection functions to simplify design of downlights, fixtures and lamps powered from an offline AC or conventional DC power source, noted the company.

The TPS92410 operates over a wide 9.5-450V input voltage range and 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 provide driver and LED circuit protection while offering 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 MCU or SimpleLink ZigBee CC2530 wireless MCU, TI indicated.

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For AC and DC applications, the TPS92410 boasts under-voltage lockout, MOSFET over-voltage protection and thermal foldback to prevent driver and LED damage during fault conditions. In AC applications, the TPS92411 offers compatibility with legacy TRIAC and reverse phase dimmers in AC mains powered LED lighting applications. It also has an on-chip, internal multiplier that produces very high power factor correction at greater than 0.95 with ±3 per cent line regulation.

Available in volume from TI and its authorised distributors, the TPS92410 is offered in a 13-pin SOIC package and is priced at $0.65 each in 1,000-unit quantities.

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