LTC3220/LTC3220-1 360mA Universal 18-Channel LED Driver Fea T Descrip T n Eighteen 20mA Universal Current Sources with The LTC 3220/LTC3220-1 are highly integrated multi- 64-Step Linear Brightness Control display LED drivers. These parts contain a high efficiency, n Independent On/Off, Brightness Level, Blinking and low noise charge pump to provide power to up to eighteen Gradation Control for Each Current Source Using universal LED current sources. The LTC3220/LTC3220-1 2 2-Wire I C Interface require only five small ceramic capacitors to form a n Low Noise Multi-Mode Charge Pump (1x, 1.5x, 2x) complete LED power supply and current controller. Provides Up to 91% Efficiency The LED currents are set by an internal precision current n Slew Limited Switching Reduces Conducted and reference. Independent dimming, on/off, blinking and Radiated Noise (EMI) gradation control for all universal current sources are n Up to 360mA Total Output Current 2 achieved via the I C serial interface. 6-bit linear DACs are n Internal Current Reference available to adjust brightness levels independently for each n Single Reset Pin for Asynchronous Shutdown and universal LED current source. Reset of All Data Registers 2 n The LTC3220/LTC3220-1 charge pump optimizes efficiency Two I C Addresses Are Available (LTC3220: 0011100, based on the voltage across the LED current sources. The LTC3220-1: 0011101) n part powers up in 1x mode and will automatically switch Automatic or Forced Mode Switching n to boost mode whenever any enabled LED current source Internal Soft-Start Limits Inrush Current n begins to enter dropout. The first dropout switches the Short-Circuit/Thermal Protection n parts into 1.5x mode and a subsequent dropout switches 4mm 4mm Ultrathin (0.55mm) 28-Lead QFN the LTC3220/LTC3220-1 into 2x mode. The parts reset to Package 2 1x mode whenever a data bit is updated via the I C port. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. a T All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6411531. n Video Phones with QVGA+ Displays n Keypad Lighting n General/Miscellaneous Lighting Typical a T 6-LED Main, 4 RGB LEDs C2 C3 2.2F 2.2F RGB1 RGB2 RGB3 RGB4 MAIN C1P C1M C2P C2M V V CPO IN IN C4 C1 LTC3220 2.2F 4.7F LTC3220-1 18 DV DV ULED1-18 CC CC 0.1F 3220 TA01 2 I C SCL/SDA RESET RST GND 32201fd 1 For more information www.linear.com/LTC3220 ion pplica ions pplica ion uresLTC3220/LTC3220-1 a Te Maxi Mu M r a T p in c F T (Notes 1, 4) TOP VIEW V , DV , CPO to GND ................................ 0.3V to 6V IN CC ULED1-ULED18 to GND ................................ 0.3V to 6V SDA, SCL, RST ........................... 0.3V to (DV + 0.3V) CC 28 27 26 25 24 23 22 I (Continuous) (Note 2) .................................. 360mA CPO ULED1 1 21 ULED18 I (Note 2) ...................................................25mA ULED1-18 ULED2 2 20 ULED17 CPO Short-Circuit Duration .............................. Indefinite ULED3 3 19 ULED16 Operating Temperature Range (Note 3) ULED4 4 29 18 ULED15 LTC3220E/LTC3220E-1 ........................40C to 85C ULED5 5 17 ULED14 LTC3220I/LTC3220I-1 ........................ 40C to 125C ULED6 6 16 ULED13 Storage Temperature Range .................. 65C to 150C ULED7 7 15 ULED12 8 9 10 11 12 13 14 PF PACKAGE 28-LEAD UTQFN (4mm 4mm) T = 125C, = 37C/W JMAX JA EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB Der in F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3220EPF PBF LTC3220EPF TRPBF 3220T 40C to 85C 28-Lead UTQFN (4mm 4mm) LTC3220EPF-1 PBF LTC3220EPF-1 TRPBF 2201T 40C to 85C 28-Lead UTQFN (4mm 4mm) LTC3220IPF PBF LTC3220IPF TRPBF 3220T 28-Lead UTQFN (4mm 4mm) 40C to 125C LTC3220IPF-1 PBF LTC3220IPF-1 TRPBF 2201T 28-Lead UTQFN (4mm 4mm) 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: