LP5524 Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – 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 de-
liver 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 fac-
tory-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