LED lighting provides efficient solutions for power management

In the terminal device, the important mission of the power management chip is to help the system to achieve as much as possible with the lowest possible power consumption. The industry is committed to optimize the power management program, mainly from two aspects: one is to improve the efficiency of power supply, and the other is to reduce the power consumption of the device at low power or standby state. The increasing popularity of portable electronic products has raised a higher demand to improve the power density and reduce the chip size.

Improve the efficiency of power supply is the industry must give priority to the problem. The PowerWise adaptive voltage national semiconductor control (AVS) technology as an example, this technique can reduce the power consumption of the system by using a closed-loop circuit, compared with the system using the same hardware and software AVS technology, by providing a closed-loop performance monitoring function and according to different system load to make flexible adjustment characteristics, power consumption than other digital systems low 64%. TI has also been committed to the design of high-performance power conversion products. The company launched the green mode eight pin UCC28600 quasi resonant controller not only can provide higher power at full load and light load working conditions, but also reduce the no-load power consumption standby mode. The device enables DLP HD TV, LCD and plasma TV standby power supply in the active power mode efficiency of more than 88%, while no load power consumption less than 300mW.

The company also has an IC power management with high conversion efficiency and low quiescent current, many industry producers are using power management IC the company's patented BurstMode (burst mode) technology. This technique maximizes the current required by the IC itself during standby mode. In many cases, the standby quiescent current is as low as 10 A-25 A.

For the sake of energy saving, incandescent lamp will gradually withdraw from the stage of history, semiconductor lighting is undoubtedly the best alternative, LED (light-emitting diode) driving technology has become the focus of the competition for analog device manufacturers. Because of the need to use high-power LED in the field of lighting, it is particularly important to improve the conversion efficiency of the drive circuit. China's Taiwan region of the new technology to control AC-DC chip manufacturers to make the conversion efficiency of more than 90%, providing a set of efficient solutions for LED lighting.

Due to the miniaturization of electronic equipment, the whole system requires that the power supply part takes up less and less printed circuit board space, so the power density of power management solution must be improved. There are many ways to solve this problem, such as higher switching frequency, more advanced packaging technology and more sophisticated production processes. In addition, the solution is based on the module of the effective way to realize miniaturization, to an LTM460x Module product as an example, the product provides a solution for the design of many space limited power supply, can solve the problem in large area accounted for, without sacrificing thermal or electrical properties.