ProgrammableLEDDriver-Farnellelement14.pdfVIP

LP5522 SNVS488A – JUNE 2007 – REVISED MARCH 2013 Programmable LED Driver Check for Samples: LP5522 FEATURES 1 ?2 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 μA Typical Shutdown Current ? Autonomous Operation without External Clock ? DSBGA-6 Package with 0.4 mm Pitch: – 1.215 mm x 0.815 mm x 0.6 mm (LxWxH) APPLICATIONS ? Indicator Lights ? Phone Cosmetics ? Toys DESCRIPTION The LP5522 is a simple single wire programmable LED controller in six bump DSBGA package. It provides constant current flow through high side driver. Output current can be set from 1 mA to 20 mA by using an external resistor on the ISET pin. If no external resistor is used, output current is set to 5 mA 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 DSBGA package together with minimum number of external components is a best fit for handheld devices. Typical Application VIN VDD ISET +- LP5522 CTRL LED GND GNDT 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. 2 PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas I