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Lighting: Multi String LED Driver

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Power Line Communication AFE RX Power Line Communication AFE TX Buck Controller DC/DC Transformer Driver MOSFET Driver MOSFET Driver MOSFET Driver Power Factor Correction Start Up LDO Microcontroller

Design Considerations

LED lighting designers are challenged with meeting their efficiency and reliability goals faster in advanced lighting designs. TI’s high efficiency conversion topologies are helping designers achieve their goals at a faster rate.

The lack of an output rectifier, in the topology shown, further increases the efficiency of the overall system and an additional benefit of this solution is the simple and robust control. Transient immunity and the current matching characteristic of the multi- transformer topology make it very reliable and the system re-balances automatically in case of an LED failure. Scalability is another key advantage in LED design and the number of LEDs in a string can be scaled up to 16 thus allowing for up-to 64 LEDs per lamp.

Application Notes

Most useful technical documents for Lighting: Multi String LED Driver Help

     

Reference Designs

Description Part # Company
19 Watt AC Input LED Driver Reference Design PMP3155 Texas Instruments

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