Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC3207 LED/CAM driver
Edited by the Electronicstalk Editorial
Team on 13 September 2007
LED/CAM driver suits phone displays
Linear Technology's LTC3207 LED/CAM driver provides 12 individually configurable current sources for main, sub, RGB, auxiliary or general purpose (GPO) displays/lights/outputs.
Linear Technology has released the LTC3207 inductorless, low-noise, high-efficiency LED/CAM driver for mobile phone displays and lighting The IC provides 12 individually configurable current sources for main, sub, RGB, auxiliary or general purpose (GPO) displays/lights/outputs, plus drive capability for one high-current 400mA LED camera light
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
Related stories
Card power chip meets smart and SIM standards
The LTC4557 is a dual SIM/smart-card power supply and level translator, which provides both 1.8 and 3V SIM power and digital signal level shifting from a 3 x 3mm QFN package.
RF mixers take transformers onboard
Linear Technology has released two new high linearity up-converting RF active mixers with integrated RF transformers.
The universal current sources have digital control with independent dimming, brightness, blinking, and gradation control, programmable via a simple two-wire I2C serial interface.
Camera flash (pulsed) or torch (continuous) current levels can be selected by the CAMHL pin or alternatively can be controlled by the I2C port.
The LTC3207's input voltage range of 2.9 to 5.5V has been optimised for single-cell Li-Ion/polymer battery applications.
When driven from a lithium battery (3.6V nominal), efficiencies reach 92%, with a quiescent current of 500uA, maximising battery run-time.
Slew-rate limited switching reduces conducted and radiated noise (EMI).
The LTC3207's multimode charge pump features low-noise, constant-frequency operation, automatically optimising efficiency based on VIN and LED forward voltage conditions.
The device powers up in 1x mode and automatically switches to boost mode (1.5x) when any enabled LED current source approaches dropout.
A subsequent dropout switches the device into doubler (2x) mode.
Internal circuitry prevents inrush current and excessive input noise during start-up and mode switching.
In addition, the device has short circuit and thermal protection.
The LTC3207 is available from stock in the low-profile 24-lead QFN (4x 4mm) package.
The IC requires only five small capacitors to create a tiny, complete LED power supply and current controller solution. Request a free brochure from Linear Technology Corp ...
• Linear Technology Corp: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
