Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC3219
Edited by the Electronicstalk Editorial
Team on 19 October 2007
LED driver suits mobile applications
Linear Technology's LTC3219 LED driver provides nine individually configurable current sources for main, sub and RGB displays.
Linear Technology has released the LTC3219, an inductorless, low-noise, high-efficiency LED driver for mobile phone displays and lighting The IC provides nine individually configurable current sources for main, sub and RGB displays
This article was originally published on Electronicstalk on 3 Oct 2008 at 8.00am (UK)
Related stories
Linear launches triple output converter
Linear Technology has revealed the LTC3100, a triple output converter that includes a 700mA (ISW) synchronous boost regulator, a 250mA (IOUT) synchronous buck regulator and a 100mA (IOUT) LDO.
Linear releases dual DC/DC regulator system
Linear Technology has introduced the LTM4616, a dual DC/DC umodule regulator system in a tiny surface mount package.
Display currents are set via a precision internal current reference.
The universal current sources can be digitally controlled with independent dimming, brightness, blinking and gradation control, programmable via a simple two-wire I2C serial interface.
The LTC3219's 2.9 to 5.5V input voltage range has been optimised for single cell Li-Ion/Polymer battery applications.
Efficiencies reach 91% with a quiescent current of only 400uA when driven from a Lithium battery (3.6V nominal), maximising battery run-time.
Slew-rate limited switching reduces conducted and radiated noise (EMI).
The LTC3219's multimode charge pump features low-noise, constant-frequency operation, automatically optimising efficiency based on the voltages across the LED current sources.
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 LTC3219 is available from stock in the low-profile (0.75mm) 20-lead QFN (3x 3mm) package.
The IC requires only five small capacitors for 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
