LTC3207/LTC3207-1 600mA Universal Multi-Output LED/CAM Driver FEATURES DESCRIPTION Low Noise, Multi-Mode Charge Pump (1x, 1.5x, 2x) The LTC 3207/LTC3207-1 are highly integrated multi-display Provides Up to 91% Ef ciency LED drivers. The device contains a high-ef ciency, low-noise Slew Limited Switching Reduces Conducted and charge pump to provide power to 12 universal LED current Radiated Noise (EMI) sources and one camera LED current source. The LTC3207/ Up to 600mA Total Output Current LTC3207-1 require only ve small ceramic capacitors to Twelve 28mA Universal Current Sources with form a complete LED power supply and current controller. 2 64-Step Linear Brightness Control In addition there are two I C addresses available. 425mA CAM LED Current Source with 16-Step The display currents are set by an internal precision cur- Linear Brightness Control and 2-Second High rent reference. Independent dimming, On/Off, blinking Current Safety Timer and gradation control for all universal current sources is Independent On/Off, Brightness Level, Blinking and 2 achieved via the I C serial interface. 6-bit linear DACs are Gradation Control for Each Current Source Using available for adjusting brightness levels for each universal 2 TM 2-Wire I C Interface LED current source. The CAM current source has a 4-bit Internal Current Reference linear DAC to adjust brightness. 2 Two I C Addresses are Available The LTC3207/LTC3207-1 charge pumps optimize ef ciency (LTC3207 00110110, LTC3207-1 00110100) based on the voltage across the LED current sources. The Con gurable ENU Pin for Asynchronous LED device powers-up in 1x mode and will automatically switch On/Off Control to boost mode whenever any enabled LED current source Automatic or Forced Mode Switching begins to enter dropout. The rst dropout switches the Internal Soft-Start Limits Inrush Current IC into 1.5x mode and a subsequent dropout switches Short-Circuit/Thermal Protection the LTC3207/LTC3207-1 into 2x mode. The device resets 4mm 4mm 24-Pin QFN Plastic Package to 1x mode whenever a data register is updated via the 2 APPLICATIONS I C port. + , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Video Phones with QVGA Displays All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6411531. TYPICAL APPLICATION 4-LED MAIN, 2-LED SUB, Dual RGB and Camera Light C2 C3 2.2F 2.2F MAIN SUB RGB RGB CAM C1P C1M C2P C2M V V CPO BAT BAT C1 C4 2.2F LTC3207/LTC3207-1 4.7F DV DV CC CC 0.1F 12 ULED1-12 2 2 I C SCL/SDA CAM 3207 TA01 ENABLE DISABLE ENU CAMHL LOW HI GND 3207fc 1LTC3207/LTC3207-1 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1, 4) TOP VIEW V , DV , CPO ........................................... 0.3V to 6V BAT CC ULED1 to ULED12, CAM .............................. 0.3V to 6V 24 23 22 21 20 19 SDA, SCL, ENU, CAMHL .............0.3V to (DV + 0.3V) CC CPO 1 18 ULED12 I CPO ULED1 2 17 ULED11 Continuous (Note 3) ........................................350mA ULED2 3 16 ULED10 25 Pulsed at 10% Duty Cycle ................................600mA ULED3 4 15 ULED9 I CAM ULED4 ULED8 5 14 Continuous (Note 3) ........................................300mA ULED5 6 13 ULED7 Pulsed at 10% Duty Cycle ................................460mA 7 8 9 10 11 12 CPO Short-Circuit Duration .............................. Inde nite Operating Temperature Range (Note 2).... 40C to 85C Storage Temperature Range ................... 65C to 125C UF PACKAGE 24-LEAD (4mm 4mm) PLASTIC QFN T = 125C, = 40C/W JMAX JA EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3207EUF PBF LTC3207EUF TRPBF 3207 24-Lead (4mm 4mm) Plastic QFN 40C to 85C LTC3207EUF-1 PBF LTC3207EUF-1 TRPBF 32071 24-Lead (4mm 4mm) Plastic QFN 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: