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Supercapacitor-Based LED Flash Driver Has 0.55-mm Profile

Combining LED flash driver and power management in one device, the NCP5680 extends battery life and improves digital photo quality. The NCP5680 LED flash driver, which comes housed in a 0.55-mm low-profile package, is capable of delivering up to 10 A for photo flash and video light in ultra-slim camera phones and compact digital cameras. To produce high-resolution pictures in low-light conditions, cameras of 5 megapixels or more require a high-intensity flash. Today’s WLEDs can deliver this level of light energy, but require up to 400 percent more power than a camera battery can provide. When paired with a thin, prismatic supercapacitor, the NCP5680 complements the lithium-ion battery by supplying this necessary high-peak-current for flash lighting. Fully programmable control of charging and discharging of the supercapacitor and overload protection ensures the right amount of light is provided for high-quality photography. The integrated driver can also power other high-peak-current circuits in portable systems, such as audio amplifiers, extending the useful battery operating time. In addition, it provides all the circuitry required to charge the supercapacitor, manage in-rush current, and control LED current. The I2C registers in the NCP5680 allow users to adjust the output current and flash duration of each of the two LEDs in real time. Built-in protection mechanisms shield the flash circuitry and LED from any faulty conditions of the driving circuit. Available in the 3.5-mm x 3.5-mm x 0.55-mm micro-QFN-24 package, the NCP5680 is priced at $1.10 per unit in 3000-unit quantities. ON SEMICONDUCTOR, Phoenix, AZ. (888)-743-7826.


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TAGS: Components
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