Module to drive LED based LCD display backlighting

Microsemi has made available LXMG1960-28, a module for mid-size light-emitting diode (LED) backlit panels of LCD display backlighting. This module saves the LCD developers from the complexity of using discrete ICs for driving LED based backlighting; it's a plug-and-play type module.

LXMG1960-28 employs Microsemi's LX1996 LED Driver. LXMG1960-28 can drive up to six-string 3.5- to 7-inch LED backlit panel applications including medical, point-of-sale (POS), kiosk, ATM and lottery terminals.

"Customers who have been using Microsemi's proven CCFL complete system solutions for many years in a variety of mainstream applications now want to be able to access Microsemi LED driving technology with the same performance, quality, reliability, service and supply chain structure," said Irene Signorino, director of marketing at Microsemi's Analog Mixed Signal Group. "We're committed to supporting our customers in their transition to highly integrated and efficient green display technologies in a wide range of consumer, commercial and industrial lighting applications. Microsemi backlight management expertise is now available in an integrated plug-and-play form not only for a broad array of CCFL backlit panels, but also, for the very first time, for LED panels," she said.

The technical features and specifications:
1. LXMG1960-28 consists of a boost converter and six programmable precision current sinks. It can     drive up to six different strings of LEDs with typical string-to-string current matching of 1 percent for     optimal panel brightness uniformity.
2. Built-in dual-in-line package (DIP) switch enables the end user to program the LED string current     between 10mA and 25mA in 1mA steps.
3. Disables the current sink if a LED light string becomes open and also ensures that if one or several     LEDs in a string short-circuit, the remaining string will continue to operate.
4. Works with wide supply voltage range of 4.75V-28V saving any external boost circuits.
5. Has a separate input pin to work with an external thermistor to provide output current fold-back to     protect the LEDs in an over-temperature situation.
6. Light dimming options include DC voltage, PWM signal and potentiometer and a combination of     analog and igital dimming provides a dimming ratio of greater than 1000:1.
7. Protection features include LED short circuit protection, over-voltage protection over-temperature     protection.

RoHS compliant: Yes
Availability: Now
Price: Each in the range of $10 to $15 for OEM quantities