LP5527 Datasheet | National Semiconductor

Description The LP5527 is a lighting management unit for handheld devices with I2C patible control interface. The LP5527 has a step-up DC/DC converter with high current output and it drives display and keypad backlights and powers the camera flash LED. In addition the DC/DC converter has the output current to power for example an audio amplifier simultaneously. The chip has four 8-bit programmable high efficiency constant current LED drivers and a FLASH LED driver. Built-in audio synchronization feature allows the user to synchronize one of the LEDs to audio input. The LP5527 has an integrated 400 m A flash driver with a safety stop feature and 50 m A torch mode. An external enable pin is provided for the synchronizing the flash with the camera action. An external software independent test interface provides a fast way to find a broken path or short on LED circuits. Very small micro SMD package together with minimum number of external ponents is a best fit for handheld devices. Features n High current boost DC-DC converter (up to 1A output current) n Programmable boost output voltage n 400 m A flash LED constant current driver with low tolerance and a safety circuit n Synchronization pin for the flash timing n Two single-ended audio inputs with gain control n Four constant current 15 m A LED drivers with 8-bit programmable brightness control n Audio synchronization feature n I2C patible control interface n Built-in LED connectivity test to maximize manufacturing yield n Small micro SMD-30 package (2.5 mm x 3.0 mm x 0.6 mm) Applications n Camera FLASH, funlight and backlight driving in battery powered devices Typical Application © 2006 National Semiconductor Corporation DS201840 .national. .. Connection Diagrams and Package Mark Information Connection Diagrams micro SMD-30 package, 2.466 x 2.974 x 0.60 mm body size, 0.5 mm pitch NS Package Number TLA3011A Top View Top View PACKAGE MARK Top View XY - Date Code TT -...