Lighting Controller Enables Efficient Dimming

STMicroelectronics’ HVLED001B all-in-one LED control chip promises to save more energy and deliver better user experiences. According to its maker, the controller simplifies designing LED-lighting modules, maximizes energy efficiency at all dimming levels, and ensures smoother brightness control.


The HVLED001B is the second generation of ST’s LED driver family containing high-voltage startup and sensing circuitry that simplifies connection to the AC line. Features include:


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  • Support for multi-platform reuse and compliance with the latest lighting regulations
  • Very accurate line and load regulation over wide range to ensure constant output voltage or output current
  • Constant output voltage regulation, with no need of an optocoupler, to ensure voltage remains below recognized 60V safe limit, improving the application robustness
  • Frequency foldback for improved efficiency and regulation at light load with good efficiency at medium load
  • Accurate and smooth dimming
  • Power-conversion efficiency greater than 90%
  • No-load power consumption less than 100mW
  • Power factor greater than 0.9, Total Harmonic Distortion (THD) below 10%
  • Low EMI at light load and medium load
  • Built-in over-current, input over-voltage, brownout, and optocoupler failure protection
  • Smart Auto-Reload Timer (ART) ensures latch-free protection for enhanced safety


The HVLED001B is in production now, housed in a SSOP10 package Price starts at $0.687 each/1,000. For more details, spend some time with the HVLED001B datasheet.