STMicroelectronics’ integrated flyback controller with advanced features boosts LED lighting performance

STMicroelectronics’ HVLED101 90-400V flyback controller for LED-lighting applications up to 180W enhances performance and simplifies design through extensive feature integration, patented control techniques, and support for primary-sensing regulation.

Joining ST’s HVLED family of high-power-factor controllers, the HVLED101 contains 800V startup circuitry that cuts the LED turn-on time to less than 250ms. High-voltage input-sensing circuitry and a maximum power control (MPC) engine are also integrated to ensure consistent power output as the line voltage fluctuates. This lets designers choose smaller and lower-cost external passive components to handle worst-case line conditions. Primary-sensing regulation without isolated feedback further reduces the bill of materials and enhances reliability.

Among the patented innovations, ST’s input-current shaping algorithm lowers total harmonic distortion (THD) and maximizes the power factor. Also, the HVLED101 is the first high-power factor flyback controller to implement ST’s new valley-locking technique to minimize audible noise, improve regulation, and reduce distortion (more info).