NS launched a highly integrated lighting management unit LP3958/5526

NS announced the launch of two new high integrated light management unit (LMU), which is characterized by the built-in high voltage boost converter and programmable constant current drive, can control the display backlight system up to 20 series of light-emitting diodes, light emitting diode is arranged within the drive and small keyboard and camera flash and RGB (RGB the light emitting diode). These two models are LP3958 and LP5526 light management units are small micro SMD package, the most suitable for mobile phones and other portable electronic products.

NS these two new lighting management units can be driven from 2 to 5 groups, each with a series of 4 light-emitting diodes, which applies to the combination of individual lighting system requirements. Whether it is a single or dual display mobile phone, or a large screen PDA phone, you can use these two new light management unit.

In addition, these two products also has 3 general purpose input / output (GPIO), and through the input / output trigger different lighting function, to start a different light, such as flash, or other signal control starting device. The output current of LP3958 chip is up to 70mA, can drive the light emitting diode display backlight system; and the output current of LP5526 chip is as high as 150mA, LED display backlight system and flash drive. In addition, these two chips are equipped with I2C interface.

Technical features of NS LP3958 and LP5526 lighting management unit

The application of single or double display as an example, the LP3958 light management unit can drive up to two groups of 8 white light emitting diode, each consisting of 4 light emitting diodes connected in series, generally speaking, a display is allocated to a group of light emitting diode. Light dark school functions display backlight through low voltage double I2C compatible interface to control, and can easily use the software to set. The user can also use the general input / output function to control the external device. Since the chip has a serial interface, it is possible to further reduce the number of wires connecting the folded mobile phone to the hinge. The small keyboard lighting system generally uses three series with LEDs, each with up to 4 LEDs, and each of the series of light emitting diode can be independently regulated, so that light can partition control. This feature is especially useful for video games and navigation systems, for example, to ensure that a specified number of buttons can emit light.

LP5526 the function of the chip and the package LP3958 like, but also to the serial flash output power up to 3W to drive the camera flash and flashlight lighting system more than bare chip light emitting diode. Once the software problems, LP5526 chip built-in security timer to ensure that the flash LED will not appear aging. The LP5526 chip specifically designed for the flash light emitting diode can also be used to drive a separate or series of red, green, and blue leds.

Price, packaging and availability

LP3958 and LP5526 two chip with 25 ball micro SMD 2.5mm x 2.5mm package size only, to 1000 for the procurement of the same unit, a single LP3958 chip price is $1.60, while the single chip LP5526 price of $2, two chips have been a large number of cash supply.