SP6683 1X/1.5X High Efficiency Charge Pump LED Driver for Flash or Backlight FEATURES V 10 1 C2P OUT Output Current up to 200mA Ideal for White LED driver in CellPhone Flash C1P 2 9 C1N SP6683 0.5A Shutdown Current V 3 8 GND IN 1x/1.5x Mode Charge Pump 10 Pin DFN +2.7V to +5.5V Input Voltage Range V 4 7 C2N MODE Built-in 1.2MHz Oscillator 6 FB 5 EN/PWM 0.5mA Quiescent Current Over Temperature Protection Now Available in Lead Free Packaging Shorted LED Protection Programmable Output Current or Voltage APPLICATIONS PWM Dimming Control via Enable Pin Mobile Phone Soft Start to limit In-Rush Current Camera Flash Driver Space Saving 10-pin 3 x 3mm DFN Package PDA Three Options for Optimizing Efficiency: Digital Still Camera SP6683 - MOSFET discharge in shutdown Digital Camcorder SP6683-03 - High Impedance in shutdown Color LCD Module SP6683-LV - Low Voltage (150mV)V Reference FB DESCRIPTION The SP6683 is a high power current regulated charge pump ideal for converting a Li-Ion battery input for driving up to 8 white LEDs used in backlighting color displays. The SP6683 operates with an internal 1.2MHz clock, enabling the use of small external components. Output current can be accurately regulated by modulating the switcher between the charge pump and output capacitor. In shutdown mode, the SP6683 discharges the output to ground and draws less than 500nA current. Offered in 10-pin DFN package, the SP6683 family includes three options that allow the user to optimize LED driving circuit SP6683-LV with low voltage reference, SP6683-03 with high impedance output in shutdown, and SP6683 with pulled down output in shutdown. TYPICAL APPLICATION SCHEMATIC C2 1uF 6.3V/0603 1 Vout 10 C2P 2 C1P 9 C1N C3 1uF SP6683 6.3V/0603 Io=Vfb/Rb LED1 3 Vin GND 8 C4 Vin 2.2uF Vmode C2N 7 4 6.3V/0603 2.7V~4.2V C1 5 6 2.2uF FB EN/PWM 6.3V/0603 EN/PWM Rb 1.5 ohm 1% / 0603 Date: 3/31/06 RevG SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight Copyright 2006 Sipex Corporation 1ABSOLUTE MAXIMUM RATINGS V , V , V and EN/PWM................. -0.3V to 6V These are stress ratings only and functional operation of IN MODE OUT Output Current (I ) ...................................... 300mA the device at these ratings or any other above those OUT Power Dissipation per Package - 10-pin DFN indicated in the operation sections of the specifications (derate 8.84mW/C above +70C) ..................... 1.2W below is not implied. Exposure to absolute maximum Junction Temperature .................................... +125C rating conditions for extended periods of time may affect Storage Temperature ...................... -65C to +150C reliability. ESD Rating............................................... 2kV HBM ELECTRICAL CHARACTERISTICS Unless otherwise specified: V = 3.6V, C1 = C4 = 2.2F & C2 = C3 = 1F (Ceramic, ESR=0.03 ) and T =25. IN AMB The denotes specifications which apply over full operating temperature range -40C to +85C. Parameter Min. Typ. Max. Units Conditions Input Voltage 2.7 5.5 V VIN = 3.0 - 5.5V, VOUT = 3.6V, Quiescent Current 0.5 3 mA Iout = 100A Shutdown Current 0.5 1.5 A VEN/PWM = 0.0V, VIN = 5.5V Maximum Load Current 200 VIN = 4.2V, Vout = 3.6V mA Oscillator Frequency 0.7 1.2 1.5 MHz VIN = 2.7 - 5.5V IOUT = 20mA, VOUT = 3.6V, V Reference Voltage 0.283 0.315 0.347 V FB 1.5X Mode 813 1.5X Mode, 100mA Load Output Resistance 36 1.0X Mode, 100mA Load V Threshold Voltage 1.00 1.25 1.50 V VIN Falling MODE V Hysteresis 60 150 mV VIN = 3.6V MODE V Pin Current 0.01 0.5 A VMODE = 1.25 V MODE EN/PWM Logic Low 0.4 V EN/PWM Logic High 1.6 V EN/PWM Pin Current 0.01 0.5 A VEN/PWM = 4.2V FB Pin Current 0.01 0.5 A VFB = 1V VOUT = 4V, IOUT = 100mA ,1.5x V Ripple 80 mV OUT Mode FB within 90% regulation V Turn-On Time 250 500 s 1.5X Mode, V = 3.6, IOUT = OUT OUT 100A Date: 3/31/06 RevG SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight Copyright 2006 Sipex Corporation 2