2012年11月12日星期一

the diagram digital power controller


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power supply load regulation  Figure 1 is a typical embodiment of the digitally-controlled power. Usually the left side of the diagram digital power controller operating voltage of 3.3V. Dig ital low-voltage processing method used in the controller design for stability and noise considerations, can not directly use the digital controller driver MOSFET. The interface between the controller and power stage MOSFET driver. PWM or digital controller is usually received by the MOSFET driver output signal, and then convert it to be suitable for efficient opening, off the MOSFET high current signals. If the controller signal is subject to interference or error, the ordinary MOSFET drivers will not be able to provide any protection.drop in anchors

2012年11月8日星期四

According to incomplete statistics


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According to incomplete statistics, about 80% of today s LED lighting products arising from the failure from the power supply, LED light source products packaging technology to continuously improve and cooling technology development over last few years, the stability of the light source has reached a good level, nails even if the said that is light fades and color drift, which is mainly caused by the irrational thermal design. Necrosis directly has been very little, relatively speaking, the power supply problem more serious, a problem is generally directly dead lights or flashes, and the relatively high frequency of occurrence. concrete nails