The 100W LED power design saves space, uses less energy, starts fast, dims, and works with many power levels in different setups.
The REF_ICL5102_U100W_LCC is a 100W constant current LED power supply reference design from Infineon Technologies. It showcases the capabilities of the ICL5102 half-bridge (HB) driver and the CoolMOS™ P7 family. A standout feature of this design is its smart high-frequency operation across a wide range of 180–450 kHz. This enables the use of a compact LCC transformer that integrates the series inductance required for the resonance tank. The advantage of this transformer structure is reduced volume and weight. As a result, the overall system achieves high power density, making it ideal for applications where space and thermal management are important.
The design efficiently manages input power with a power factor greater than 0.9 at 30% load and input current total harmonic distortion (THD) kept below 10% at 20% load (both measured at 267 VRMS). It operates across a wide input voltage range of 90–267 VAC and reaches up to 93.0% efficiency at 230 VRMS input (91.5% at 120 VRMS). This high efficiency and low distortion offer the benefit of compliance with energy and power quality standards, improving long-term system reliability and reducing energy waste.
At its core is the ICL5102, a fully integrated controller IC that combines both the boost PFC stage and the resonant half-bridge stage for LCC or LLC topologies. It includes Infineon’s proprietary coreless transformer-based high-side MOSFET driver, which allows for robust high-frequency operation up to 500 kHz. This provides a clear advantage in hard-switching conditions, reducing stress on components and enabling stable operation. Users benefit from a simpler, more compact system with fewer external components and improved long-term performance.
The reference design supports analog dimming from 100% to 1%, output voltage from 20 V to 55 VDC, and a broad output current range of 0.018 A to 1.82 A. It achieves a fast start-up time of under 500 ms at 90 VAC, enhancing user experience in applications where quick light-up is important. These features ensure precise current regulation, smooth dimming, and rapid response, which are key benefits for professional lighting installations.
Designed to meet global standards, the power supply conforms to EN61000-3-2 Class-C for harmonics and EN55015 for EMI limits. Its built-in monitoring and protection features ensure safe and reliable performance in a wide range of conditions. For the user, this translates into reduced maintenance, higher system uptime, and compliance with lighting regulations.
Overall, the REF_ICL5102_U100W_LCC reference design is a cost-effective solution that combines high efficiency, compact design, and excellent power quality. It is well-suited for LED lighting applications such as high-bay fixtures, office lighting, street lighting, and smart outdoor lamps, where size, efficiency, and reliability are key.
Infineon has tested this reference design. It comes with a bill of materials (BOM), schematics, assembly drawing, printed circuit board (PCB) layout, and more. The company’s website has additional data about the reference design. To read more about this reference design, click here.
