Search by company

Power chip manages complex backlights

Edited by the Electronicstalk editorial team Jun 27, 2007

Seven-channel charge-pump-based light management unit offers backlighting for a main display, subdisplay and indicator functions.

Sipex Corp has released a seven-channel charge-pump-based light management unit (LMU) for mobile display and keypad LED backlighting.

The SP7680 is targeted at backlighting the main display, subdisplay and indicator functions.

Seven LED driver channels are partitioned into three banks of four channels, two channels and one channel; however, the LEDs can be configured in numerous combinations to meet the needs of various lighting requirements.

Each bank can be independently programmed through an I2C interface up to 31mA (63mA for the single channel bank) with 6bit resolution.

The SP7680 charge pump has gains of both 1x and 1.5x and, along with a driver dropout voltage of 0.2V, maximises efficiency and extends the minimum input voltage range.

The device operates at 2MHz, utilises only four small capacitors and is offered in a 3 x 3mm QFN16 package, requiring minimum board space.

"The SP7680, with its unique three bank LED driver design, delivers the ultimate flexibility in solving a wide variety of backlighting requirements making it an excellent choice for designers working across multiple design platforms", says Chris Lee, Technical Marketing Manager for Power Products at Sipex.

"This product is an excellent example of Sipex's focus on more proprietary, higher integration, system level solutions to drive more value for our customers", says Ed Lam, Vice President of Marketing for Sipex.

"We have had excellent customer response to the functionality the SP7680 offers in mobile applications".

The SP7680 is available in a Pb-free, thermally enhanced, 16-pin 3 x 3mm QFN package, and it is specified over the -40 to +85C temperature range.

Pricing for these products begins at US $1.50 in 1000-piece quantities.