LP5524 Datasheet | National Semiconductor

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 100m A. 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 25m A per LED - Ultra-Small Solution Size: - - - - - No External ponents - Micro SMD-9 Package with 0.4 mm pitch: 1.215mm x 1.215mm x 0.6mm (Lx Wx H) 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 © 2007 National Semiconductor Corporation .national. Free Datasheet http://../ Connection Diagrams and Package Mark Information Connection Diagrams Micro SMD-9 package, 1.215 x 1.215 x 0.60 mm body size, 0.4 mm pitch NS Package Number TMD09AAA Top View Bottom View PACKAGE MARK ORDERING INFORMATION Order Number LP5524TM-5 LP5524TMX-5 Default LED Current (Note 1) 5 m A 5 m A Package Marking V2 V2 Supplied As TNR 250 TNR 3000 Spec/Flow NOPB NOPB Note 1: Other current options are available upon request, please contact the National Semiconductor Sales Office. PIN DESCRIPTIONS Pin A1 A2 A3 B1 B2 B3 C1 C2 C3 Name ISET ENB ENA D1B VIN D1A D2B GND D2A Type AI DI DI AO P AO AO G AO Current set input Enable for bank B Enable for bank A Current source output, bank B LED1 Power supply pin Current source output, bank A LED1 Current source...