Complete the design of LED lighting power supply system in minutes

Latest update time：2021-09-07 18:12

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As government mandates to ban incandescent lamps have been strictly enforced, the LED lighting market continues to grow, but there are still many challenges in finding effective power systems to achieve LED miniaturization. Requirements such as triac dimming control, coping with the global uneven power line regulations, reducing costs, improving efficiency, and supporting a wider output power range have increased the complexity of design. Fairchild recently released the FL7733A and FL7734 primary-side regulation (PSR) LED driver products and 800 V SuperFET® II MOSFET to successfully meet these needs.

LED lighting design engineers still face a not insignificant challenge – putting all the parts together to form an effective power electronics system, as shown in Figure 1. With these engineers in mind, Fairchild has enhanced the Power Supply WebDesignerTM online design and simulation tool to include high-performance PSR Flyback/Buck-Boost LED drivers for both non-dimming and phase-cut dimming lighting applications.

figure 1

Buck-Boost topology

10W–100W LED Power Supply System

Based on the specific design requirements of these engineers, the Power Supply WebDesigner tools can quickly and accurately evaluate the design performance and can improve the design. These tools also allow users to perform detailed simulation analysis (Figure 2) and gain insights into how their design and hardware samples can work together with higher confidence, all within minutes. For other collaborations, users can save their designs for future reference or easily share their designs with other engineers for review.

figure 2

Power System Simulation

The Power Supply WebDesigner tool provides a quick guided design experience for novice designers while allowing experienced designers to further customize key design factors. The tool provides recommended power system components, including Fairchild's 800 V SuperFET II MOSFET, LED driver IC and rectifier bridge and schematics. By letting the tool directly recommend or fine-tune inductor and EMI filter designs, designers can predict key system power factor and THD results. With the ability to visualize the main component power consumption and system efficiency under different line and load conditions (Figure 3), experienced designers can optimize component selection to gain some efficiency at the end of the design.

image 3

Under different line voltage and load conditions

Detailed loss analysis

Power Supply WebDesigner design tools provide a complete set of time-saving LED driver design tools that can be used to design and optimize LED drivers. These online tools provide a range of experience from device to system analysis and simulation, all in minutes. Regardless of experience, these tools can improve effectiveness, efficiency and reliability when designing even the most challenging triac dimming LED drivers.

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