LP3954 Datasheet | National Semiconductor

Description LP3954 is an advanced lighting management unit for handheld devices. It drives any phone lights including display backlights, RGB, keypad and camera flash LEDs. The boost DC-DC converter drives high current loads with high efficiency. White LED backlight drivers are high efficiency low voltage structures with excellent matching and automatic fade in/ fade out function. The new stand-alone mand based RGB controller is feature rich and easy to configure. Built-in audio synchronization feature allows user to synchronize the color LEDs to audio input. Integrated high current driver can drive camera flash LED or motor/vibra. Internal ADC can be used for ambient light or temperature sensing. The flexible SPI/I2C interface allows easy control of LP3954. Small micro SMD package together with minimum number of external ponents is a best fit for handheld devices. Features - - - - - - - - - - Audio synchronization for color/RGB LEDs mand based PWM controlled RGB LED drivers High current driver for flash LED with built-in timing. 4+2 or 6 low voltage constant current white LED drivers with programmable 8-bit adjustment (0…25m A/LED) High efficiency Boost DC-DC converter SPI / I2C patible interface Possibility for external PWM dimming control Possibility for clock synchronization for RGB timing Ambient light and temperature sensing possibility Small package - micro SMD or micro SMDxt, 3.0 x 3.0 x 0.6mm Applications - Cellular Phones - PDAs, MP3 players Typical Applications © 2007 National Semiconductor Corporation .national. Connection Diagrams and Package Mark Information CONNECTION DIAGRAMS .. Micro SMD Package, 3.0 x 3.0 x 0.6mm, 0.5mm pitch NS Package Number TLA36AAA or Micro SMDxt Package, 3.0 x 3.0 x 0.65mm, 0.5mm pitch NS Package Number RLA36AAA PACKAGE MARK ORDERING INFORMATION Order Number LP3954TL LP3954TLX LP3954RL LP3954RLX Package Marking D49B D49B D49B D49B Supplied As TNR 250 TNR 1000...