LMU provides ambient light-controlled backlight brightness

LMU provides ambient light-controlled backlight brightness

Suitable for powering camera modules, the AAT2870 light management unit (LMU) is basically a negative charge pump that fully supports ambient light controlled backlight brightness using photo diodes. Offering complete ambient light sensor management, the LMU provides automatic sensor bias, calibration and control of analog ambient light sensors and low-cost photo diodes.

The part’s tri-mode negative charge pump is capable of independent current control of eight white LEDs up to 27.9 mA and offers direct LED connection to the battery, further enhancing efficiency and making it comparable to inductor-based conversion. Independent load switches selectively connect LEDs with high forward voltage (VF ) to the charge pump for better management of VF variations. Housed in a 3.1 x 2.6-mm 30-pin WLCSP package, the LMU also drives four I2 C programmable LDO outputs at up to 300 mA.($1.24 ea/10,000 — available now.)

By Christina Nickolas

AnalogicTech , Santa Clara , CA

Information 408-737-4600

http://www.analogictech.com