ON Semiconductor, the world's leading provider of high-performance, energy-efficient silicon solutions, introduces the NCP5680 optimized supercapacitor light-emitting diode (LED) flash driver for flash and video cameras for ultra-thin camera phones and compact digital cameras (videolight) provides up to 10 amps (A) of current.
Marie-ThereseCapron, director of low-voltage power management products at ON Semiconductor, said: "The NCP5680 combines ultra-thin prismatic supercapacitors to provide an excellent LED flash and power management solution for ultra-thin camera phones and digital cameras. This comprehensive LED flash solution The luminosity is comparable to Xenon flash, but the height is only half that of the latter, and no additional LEDs are needed to shoot the video. The NCP5680 enables the lithium-ion battery to make more power-consuming functions work longer. This new supercapacitor-based power management The solution allows smartphones to offer a richer set of features."
ON Semiconductor's NCP5680 combines the latest slim prismatic supercapacitors, such as those supplied by CAP-XX and authorized by Murata, with a capacitance of 0.9F at 5.5V, and the high-power LEDOSLUXNCP5680 from Osram complements the lithium-ion battery. Provides a peak current of up to 10A for flash illumination and is optimized for use with the BriteFlashTM power architecture developed by CAP-XX. Fully programmable control of supercapacitor charging and discharging and unique overload protection ensures proper light for high quality photography. The NCP5680 integrated driver also powers other large peak current circuits in portable systems such as audio amplifiers, extending useful battery operating time.
A 5 megapixel or higher resolution camera requires a high-brightness flash in order to take high-resolution photos in low light. Today's white LEDs can provide this level of light energy, but need to be nearly 400 more than the camera battery can provide. ON Semiconductor's NCP5680 is equipped with a battery that manages a supercapacitor to drive the LED flash to full brightness, providing a large peak current of up to 10A. The integrated driver in the NCP5680 also manages supercapacitors to handle other peak power functions such as zoom, autofocus, audio, video, wireless transmission, global satellite positioning (GPS) data reading and radio frequency (RF) amplification to extend battery life Without giving up the slim design.
The NCP5680 integrates all the circuitry needed for supercapacitor charging, inrush current management, and LED current control, saving designers development time, board space, and component cost. Fully programmable control of supercapacitor charging and discharging ensures proper light for high quality photography.
Flexible control with I2C interface
The I2C register in the NCP5680 allows the user to adjust the output current and flash duration of each of the two LEDs in real time. So this solution can provide different lighting effects, such as indicator lights, pre-flash, power flash for photography, and flashlight for video recording. When the NCP5680 is connected to an ambient light sensor, it automatically limits the duration of the flash to prevent overexposure of the photo to ensure photo quality. In addition, the supercapacitor charging current can be adjusted by the I2C register. The NCP5680 can shut down charging during Global System for Mobile Communications (GSM) transmission, limiting battery current consumption.
Security features
The NCP5680 also has several built-in protection mechanisms including flash timeout, temperature detection, overload protection and short circuit protection. This device protects the flash circuit from any faults in the driver circuit and LEDs.
Packaging and price
The NCP5680 is available in a 3.5mm x 3.5mm x 0.55mm μQFN-24 package and is priced at $1.10 per unit in 3,000-piece quantities.
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