SSPP66668866 440000mmAA BBuucckk//BBoooosstt CChhaarrggee PPuummpp LLEEDD DDrriivveerr August 2009 Rev. 2.0.0 GENERAL DESCRIPTION APPLICATIONS The SP6686 is a current-regulated charge White LED Torch/Flash for Mobile pump ideal for powering high brightness LEDs Phones, DSCs and Camcorders for camera flash applications. Generic Lighting/Flash/Strobe The charge pump can be set to regulate two Applications current levels for FLASH and TORCH modes. White LED Backlighting The SP6686 automatically switches modes between step-up and step-down ensuring that LED current does not depend on the forward FEATURES voltage. A low current sense reference voltage Output Current up to 400mA (50mV) allows the use of small 0603 current sensing resistors. Up to 94% Efficiency in Torch Mode The SP6686 is designed to operate from a Adjustable FLASH Mode single cell lithium-ion battery or fixed 3.3V or x1 and x2 Automatic Modes for High 5.0V power rails and is available in a RoHS Efficiency compliant, green/halogen free space saving 10-pin 3mmx3mm DFN package Minimum External Components: No Inductors 2.4MHz High Frequency Operation 1 A Shutdown Current Built-In Soft Start Limit Inrush Current Output Overvoltage Protection Over current/Temperature Protection 10-pin 3mm x 3mm DFN Package TYPICAL APPLICATION DIAGRAM Fig. 1: SP6686 Application Diagram Exar Corporation www.exar.com 48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 Fax. +1 510 668-7001 SSPP66668866 440000mmAA BBuucckk//BBoooosstt CChhaarrggee PPuummpp LLEEDD DDrriivveerr ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS These are stress ratings only and functional operation of Input Voltage Range V ............................... 2.7V to 5.5V IN the device at these ratings or any other above those Operating Temperature Range ................... -40C to 85C indicated in the operation sections of the specifications Thermal Resistance ................................... 57.1C/W JA below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. V , V ................................................... -0.3V to 6.0V IN OUT Output Current Pulse (FLASH) .............................. 500mA Output Current Continuous (TORCH) ..................... 200mA V ................................................................. 0V to 7V EN Storage Temperature .............................. -65C to 150C Lead Temperature (Soldering, 10 sec) ................... 260C ESD Rating EN pin (HBM - Human Body Model) .......... 1kV ESD Rating All Other Pins (HBM) .............................. 2kV ELECTRICAL SPECIFICATIONS Specifications with standard type are for an Operating Junction Temperature of T = 25C only limits applying over the full J Operating Junction Temperature range are denoted by a . Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at T = 25C, and are provided for J reference purposes only. Unless otherwise indicated, V = V = 3.6V, C = 2.2F, C = 0.47F, C = 1F. T = 40C IN SHTDN IN FC OUT A to 85C. Parameter Min. Typ. Max. Units Conditions Operating Input Voltage 5.5 V 2.7 V = 2.7 5.5V FLASH = 0V IN 0.5 3 I = 100 A Quiescent Current LOAD mA FLASH = V , 2x Mode 2 IN Shutdown Current 1 A V = 5.5V, V = 0V IN EN Oscillator Frequency 2.4 MHz Charge Pump Equivalent 5 V = 0V, V = 3.6V FB IN Resistance (x2 Mode) Charge Pump Equivalent 0.6 0.8 V = 3.6V IN Resistance (x1 Mode) FB Reference Voltage 138 150 162 mV FLASH = V R = 106k IN, SET FB Reference Voltage 50 55 mV FLASH = GND 45 FB Pin Current V = 0.3V 0.5 A FB EN, Flash Logic Low 0.4 V EN, Flash Logic High 1.3 V EN, Flash Pin Current 0.5 A V Turn-on Time 250 500 s V = 3.6V, FB within 90% of regulation OUT IN o Thermal Shutdown Temperature 145 C 2009 Exar Corporation 2/12 Rev. 2.0.0