MC34063, an iPod-MP3 player charger

While away from your computer, you can utilize a portable iPod charger. The circuit's central component is an MC34063 switchmode controller. Because of its excellent efficiency, even when operating at its maximum output current, very little heat is generated inside the box. The circuit is more complex than if we were to use a 7805 3-terminal regulator, but because the input voltage may be as high as 15V DC, the voltage dissipation in such a regulator may be as high as 5W at 500mA, which is far more than a 7805 can handle even with a substantial heatsink.









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