320W high power LED driver with four constant current output channels
This four-channel reference design consists of a dual-stage half-bridge LLC and a separated power factor correction (PFC) stage with high-precision secondary-side controlled constant voltage output realized by the ICL5102 LED driver IC. For precise current control, as well as deep dimming down to 0.5% and flicker-free light on the secondary side a buck topology such as realized with the ILD8150E is the ideal choice.
The primary stage utilizes a combo controller with DCM PFC which enables significant cost savings compared to CCM PFC mode that is commonly deployed at such high power levels. In addition the dedicated lighting IC ICL5102 ensures very low THD and high power factor over voltage and load variations.
The multiple DCDC buck channels ensure reliable operation as well as scalability of this design over a wide power range by reducing / increasing the number of channels.
This scalability enables a platform approach for high power and reduces the design effort for LED driver makers.
The reference board offers excellent output voltage accuracy of typically +/-4% across a universal input voltage range from 90 to 305VAC and wide output current range from 0 to 4.35A.
High power factor, beyond 0.9, across a universal input voltage range from 90 to 305VAC and down to 50% of nominal load is achievable.
This solution allows for low input current total harmonic distortion (iTHD less than 15%) across a universal input voltage range (90 to 305VAC) and down to 30% of nominal load.
Summary of Features
- 320W high-power design
- High performance LLC design
- Up to 1.5A average output current per channel
- PWM dimming input with 250Hz to 20kHz PWM dimming frequency
- Analog dimming 100 to 12.5%
PWM dimming 12.5 to 0.5% with 3.4kHz flicker-free modulation
- Ready to go AC-DC and DC-DC solution with four channels
- High efficiency
- High light quality
- Balanced BOM performance
- LED lighting driver
- ACDC power
- High power charging
Modular lighting boards
At Infineon we offer a broad variety of primary side ACDC and secondary side DCDC boards dedicated to LED lighting. The LED lighting boards can easily be stacked together for plug-and-play solutions.