The flashlight drive circuit

Published:2011/8/18 7:57:00 Author: | Keyword: flashlight drive | From:SeekIC

The electric charge is fixed with capacitors as the storage elements, and it doesn't need any external inductors, so the electromagnetic disturbance problem doesn't exist. Besides, the whole resolution takes little PCB coverage, but the efficiency is low. As the flashlight working time is short, which is about 100~300ms, so its efficiency has little effect on the battery lifespan. In figure 2 is the application circuit of the electric charge pump standard white light LED. Figure 1 the application circuit of the inductance boost transformer drive standard white light LED



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