LED Flash Driver suits slim phones/digital cameras.
July 9, 2009 -
Measuring 3.5 x 3.5 x 0.55 mm, NCP5680 supercapacitor-based LED flash driver delivers up to 10 A for photo flash and video light, minimizing drain of Li-Ion batteries. Unit features programmable control of charging/discharging of supercapacitor and can run various lighting, wireless transmission, and GPS functions. Users can adjust output current and flash duration of each LED in real time. Protection includes flash time-out, temperature detection, and overload/short circuit protection.
ON Semiconductor Introduces Industry's First 10 A Supercapacitor-Based LED Flash Driver for Ultra-Slim Camera Phones and Digital Cameras
The new NCP5680 is an integrated LED flash and power management solution offered in a 0.55 mm low-profile package that extends battery life and significantly improves digital photo quality
Phoenix, Ariz. - June 25, 2009 - ON Semiconductor (Nasdaq: ONNN), a leading global supplier of high performance, energy efficient, silicon solutions has introduced the NCP5680 supercapacitor-optimized LED flash driver capable of delivering up to 10 amperes (A) for photo flash and video light in ultra-slim camera phones and compact digital cameras.
"The NCP5680, combined with an ultra-thin prismatic supercapacitor, delivers an ideal LED flash and power management solution for slim camera phones and digital cameras," said Marie-Therese Capron, ON Semiconductor director of low voltage power management products. "This total LED flash solution supplies comparable light energy to xenon flash, but with only half of the comparable solution height and no need for an extra LED for video capture. Because the NCP5680 enables the Lithium-ion battery to support more power-hungry functions for a longer time, this new supercapacitor-based power management solution enables smart phones to offer ever richer functionality."
When combined with the latest thin, prismatic supercapacitors - such as those offered by CAP-XX and licensed by Murata Manufacturing Co. Ltd., Japan with a capacitance of up to 0.9F at 5.5 V - and the high-power LED OSLUX from Osram - ON Semiconductor's NCP5680 complements the Lithium-ion battery by supplying high-peak-current of up to 10 A for flash lighting optimized for use with the BriteFlash(TM) Power Architecture developed by CAP-XX. Fully programmable control of charging and discharging of the supercapacitor and unique 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.
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. To support the battery, ON Semiconductor's NCP5680 manages a supercapacitor to drive the LED flash to full intensity, supplying high-peak-current up to 10 A. The integrated driver in the NCP5680 also manages the supercapacitor to handle other peak-power needs - zoom, auto-focus, audio, video, wireless transmissions, GPS readings and RF amplification - extending battery life without compromising slimline design.
The NCP5680 integrates all circuitry required to charge the supercapacitor, manage in-rush current and control LED current, thus saving designers development time, board space and component cost. Fully programmable control of charging and discharging of the supercapacitor ensures the right amount of light for high quality photography.
Flexible Control Through I2C Interface
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. This solution can therefore perform different lighting effects such as indicator light, pre-flash, and power flashlight for photographing and torchlight for video recording. When connecting to an ambient light sensor, the NCP5680 will automatically limit the flash duration to prevent photo over-exposure, thus preserving the photo quality. Additionally, the supercapacitor charging current is adjustable through an I2C register. NCP5680 can disable the charging operation during global system for mobile (GSM) transmission, in order to limit the current drawn from the battery.
Safety Protection Features
Additionally, the NCP5680 has multiple built-in protection mechanisms, including flash time out, temperature detection, overload protection and short circuit protection. The device protects the flash circuitry from any faulty conditions of the driving circuit, as well as for the LED.
Packaging and Pricing
Available in the 3.5 mm x 3.5 mm x 0.55 mm µQFN-24 (micro-QFN-24) package, the NCP5680 is budgetary priced at $1.10 USD per unit in 3,000 unit quantities.
For additional technical information, visit http://www.onsemi.com or contact Helene Acrosse at helene.acrosse@onsemi.com.
About ON Semiconductor
With its global logistics network and strong product portfolio, ON Semiconductor (Nasdaq: ONNN) is a preferred supplier of high performance, energy efficient, silicon solutions to customers in the power supply, automotive, communication, computer, consumer, medical, industrial, mobile phone, and military/aerospace markets. The company's broad portfolio includes power, analog, DSP, mixed-signal, advance logic, clock management, non-volatile memory and standard component devices. Global corporate headquarters are located in Phoenix, Arizona. The company operates a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions. For more information, visit http://www.onsemi.com.
ON Semiconductor and the ON Semiconductor logo are registered trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the company references its Web site in this news release, such information on the Web site is not to be incorporated herein.
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