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Infineon XDPL8219 Regulated Flyback Controller

Featuring high power factor and constant voltage output

The Infineon XDPL8219 is a digital high-power-factor XDP™ secondary-side regulated flyback controller known for cost-effective, dual-stage LED drivers.

The XDPL8219 features high power factor and constant voltage output, operating in quasi-resonant mode (QRM) to maximize the efficiency and minimize the electromagnetic interference (EMI) over a wide load range. The Infineon controller enters active burst mode (ABM) at light load to prevent audible noise from being heard, while achieving no-load standby power as low as <100mW. The XDPL8219 detects the input voltage type (AC or constant DC) and adjusts its proprietary voltage- mode pulse modulator accordingly to enhance the system performance.

AC Input

For AC input, it adjusts the pulse modulation for achieving a high power factor (PFC >0.9) as well as low total harmonic distortion (THD <10%).

DC Input

For a constant DC input, it adapts the pulse modulation, thereby adjusting the switching frequency to reduce EMI over the entire operating range.

The XDPL8219 flyback controller provides maximum design flexibility and performance optimization through parameter configuration via the Universal Asynchronous Receiver Transmitter (UART) pin. Transmitting signals to report parameters such as input voltage, line frequency, controller temperature, last error code, and input voltage loss indication, the XDPL8219 programming tools provided by Infineon include a user-friendly graphic user interface (GUI) for the PC for configuring the parameters.

The device is housed in a DSO-8 package, with a built-in 600V HV start-up cell and a proprietary start-up sequence, ensuring a fast output voltage rise with minimal overshoot.

Features & Benefits

  • Enhanced power factor correction (PFC)
  • Enhanced total harmonic distortion (THD) correction
  • Standby power 100mW
  • Reporting of parameters via uni-directional UART communication
  • Digitally configurable parameters
  • UL1310 safety feature
  • High-performance and robust LED designs
  • Increased flexibility
  • Added intelligence through UART reporting


  • LED lighting
  • AC-DC power supply

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Infineon XDPL8219