[Text / high-tech LED reporter Liu Pingping] " Non-isolation is an inevitable development direction, non-isolated drive is more efficient, and the cost is lower." Wang Chengxiang, deputy general manager of Quanxin Electronic Technology Co., Ltd., with LED With the continuous improvement of light efficiency, heat dissipation becomes more and more simple, and with the continuous improvement of heat-dissipating materials and performance, many heat-conductive plastics have been able to achieve the heat-dissipating effect close to aluminum, and can also meet the pressure resistance requirements. QX61 series is used in various power sources Quanxin Electronics Booth
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“This is a good boost for non-isolated drives. These advances in lamp beads and heat dissipation have made non-isolation inherently efficient, small and low-cost.â€
The non-isolated drive is more efficient, which is beneficial to improve light efficiency and save the number of lamp beads. Compared with the isolated LED power supply, the non-isolated LED power supply has the advantages of simple circuit structure, high circuit conversion efficiency, and small number of components.
On the other hand, due to the increasingly stringent cost requirements of the light source in the terminal market, the cost of the isolated power supply solution is high, and the space for future cost reduction is limited, so the future must move toward a low-cost, thin and light solution.
"It is the development prospect of non-isolated drive. We have recently launched the QX61 series of products, and we will focus on it at today's exhibition." Wang Chengxiang introduced that the QX6102 is a representative product in the QX61 series. It is a high-precision step-down high-power LED constant current driver chip with low-cost non-isolated built-in power tube. It is suitable for non-isolated LED constant current drive in the full voltage range of 85Vac-265Vac. 
The chip uses a self-powered system, no need to take power from the auxiliary winding, built-in NPN tube, LED lighting solutions can be completed with very few external components. The chip adopts patented technology such as high-end current detection and current mode PWM control of Quanxin Electronics. It has a fixed operating frequency, excellent linearity adjustment and load regulation, and built-in frequency-hopping function to reduce EMI cost. 
