LP5522 Datasheet | National Semiconductor

Description The LP5522 is a simple single wire programmable LED controller in six bump micro SMD package. It provides constant current flow through high side driver. Output current can be set from 1 m A to 20 m A by using an external resistor on the ISET pin. If no external resistor is used, output current is set to 5 m A default current. The LP5522 is controlled using only one signal. The signal controls either directly the LED driver .. or it launches previously programmed blinking sequence. The LP5522 works autonomously without a clock signal from the master device. Very low LED driver headroom voltage makes possible to use supply voltages close to LED forward voltage. Current consumption of the LP5522 is minimized when LED is turned off and once controller is disabled all supporting functions are also shut down. Very small micro SMD package together with minimum number of external ponents is a best fit for handheld devices. Features - Programmable blinking sequence - - - - 1 to 3 programmable pulses 1 ms to 255 ms LED on time 10 ms to 2500 ms LED off time Single or continuous run of programmed blinking sequence Constant current high side output driver Adjustable current with external resistor 0.2 u A typical shutdown current Autonomous operation without external clock Micro SMD-6 package with 0.4 mm pitch: 1.215 mm x 0.815 mm x 0.6 mm (Lx Wx H) - - - - - Applications - Indicator lights - Phone cosmetics - Toys Typical Application © 2007 National Semiconductor Corporation .national. Connection Diagrams and Package Mark Information Connection Diagrams Micro SMD-6 package, 0.815 x 1.215 x 0.60 mm body size, 0.4 mm pitch NS Package Number TMD06AAA Top View .. Bottom View PACKAGE MARK ORDERING INFORMATION Order Number LP5522TM LP5522TMX PIN DESCRIPTIONS Pin A1 B1 C1 A2 B2 C2 Name VDD ISET CTRL LED GND GNDT Type P AI DI AO G G Power supply pin Current set input Digital control input Current source output...