LP5526 Datasheet | National Semiconductor

Description LP5526 is a Lighting Management Unit for portable applications. It is used to drive display backlights, keypad LEDs, RGB LEDs and camera flash LEDs. LP5526 can drive 2 separately connected strings of LEDs with high voltage boost converter. The RGB driver allows driving either individual color LEDs or RGB LED from separate supply power, or it can be used to drive series connecter flash LEDs from high voltage boost converter. The backlight drivers (MAIN and SUB pins) are both high resolution constant current mode drivers. The flash outputs can drive series connected flash LED with up to 150m A of current. External PWM control can be used for dimming any selected LED outputs or it can be used to trigger the flash. The flash has also 1-second safety timer. The device is controlled through 2-wire low voltage I2C patible interface that reduces the number of required connections. Features n High efficiency boost converter with programmable output voltage up to 20V n 2 individual drivers for serial display backlight LEDs n Automatic dimming controller n Stand alone RGB controller n Dedicated flash function n Safety function to avoid prolonged flash n 3 general purpose IO pins n 25-bump micro SMD Package: (2.54mm x 2.54mm x 0.6mm) Applications n Cellular Phones and PDAs n MP3 Players n Digital Cameras Typical Application . Data Shee . © 2006 National Semiconductor Corporation DS201797 .national. .. Typical Application (Continued) Connection Diagrams 25-Bump Thin Micro SMD Package, Large Bump NS Package Number TLA25CCA et4U. Data Shee . Top View Bottom View . .national. 2 .. Pin Descriptions Pin # 5E 5D 5C 5B 5A 4E 4D 4C 4B 4A 3E 3D 3C 3B 3A 2E 2D 2C 2B 2A 1E 1D 1C 1B 1A Name SW FB RLED GLED BLED GND_SW NRST SCL IRGB GND_RGB VDD2 VDDIO SDA GPIO[2] GPIO[0] / PWM GND_WLED GNDT VDD1 VREF GPIO[1] MAIN SUB VDDA GND IRT Type Output Input Output Output Output Ground Input Logic Input Input Ground...