TI brightens notebook LCD displays with new white LED driver

Tag : Used LCD
Helping display manufacturers meet demands for more efficient powertechnologies in displays, Texas Instruments Incorporated (TI)introduced today an innovative, six-channel, 40-V white lightemitting diode (LED) driver with a built-in, high-efficiency boostregulator and 1.5-A FET. The smallest LED driver to manage up to 60white LEDs at once, the TPS61181 provides high power efficiency andaccurate current regulation for medium-sized displays used innotebooks, portable GPS, industrial and medical applications.

Notebook and other LCD displays have traditionally relied on CCFL(cold cathode fluorescent lamps) technology to backlight thedisplay. Many portable electronics makers have switched from CCFLto white LEDs for backlighting, allowing for greater power savingsand thinner panels. This conversion has already taken place in mostsmaller LCD applications, such as mobile phones and portable mediaplayers. The TPS61181 gives engineers designing medium-sizedportable applications an easy path to LED design.

The integrated device, which comes in a tiny 0.8 mm x 3 mm x 3 mmQFN package, provides several protection features, including adriver for an external FET to disconnect the battery from the whiteLEDs during shutdown and over-current conditions.

Enhanced dimming control provides designers a range of brightness
The TPS61181 offers enhanced pulse-width modulation (PWM)brightness dimming control for a 100:1 brightness range. Featuringtwo patented technologies, the device is designed to minimize anypotential audible noise or output AC ripple across a wide dimmingduty cycle and frequency range.

Texas Instruments