LP5524

LP5524 Parallel LED Driver with PWM Brightness Control in Micro SMD Package July 2007 LP5524 Parallel LED Driver with PWM Brightness Control in Micro SMD Package General Description The LP5524 is a highly integrated dual-zone LED driver that can drive up to four LEDs in parallel with a total output current of 100mA. Regulated high side internal current sources deliver excellent current and brightness matching in all LEDs. LED driver current sources are split into two independently controlled banks for driving secondary displays, keypad and indicator LEDs. Brightness control is achieved by applying PWM signals to each enable pin. Default LED current is factory-programmable and an optional external resistor can be used to set LED current to user programmable values. LP5524 is available in National’s tiny 9-bump thin micro SMD package. Features ■ High side LED driver ■ Drives 4 LEDs with Up to 25mA per LED ■ Ultra-Small Solution Size: ■ ■ ■ ■ — No External Components — Micro SMD-9 Package with 0.4 mm pitch: 1.215mm x 1.215mm x 0.6mm (LxWxH) 0.4% Typical Current Matching PWM Brightness Control Over-Current Protection Wide Input Voltage Range: 2.7V to 5.5V Applications ■ Sub display Backlight ■ Keypad LED Backlight ■ Indicator LED Typical Application 30007601 © 2007 National Semiconductor Corporation 300076 www.national.com Free Datasheet http://www.datasheet4u.com/ LP5524 Connection Diagrams and Package Mark Information Connection Diagrams Micro SMD-9 package, 1.215...