LTC3207/LTC3207-1

1

3207fc

C1P C1M C2P C2M

SCL/SDA

ENU

CAMHL

CPO

ULED1-12

CAM

GND

LTC3207/LTC3207-1

12

MAIN

SUB

CAM

RGB

ENABLE DISABLE

LOW HI

3207 TA01

RGB

C4

4.7µF

C1

2.2µF

0.1µF

2

C3

2.2µF

C2

2.2µF

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

600mA Universal

Multi-Output LED/CAM Driver

LEDdrivers.Thedevicecontainsahigh-efficiency,low-noise

charge pump to provide power to 12 universal LED current

sources and one camera LED current source. The LTC3207/

LTC3207-1 require only five small ceramic capacitors to

form a complete LED power supply and current controller.

The display currents are set by an internal precision cur-

rent reference. Independent dimming, On/Off, blinking

and gradation control for all universal current sources is

available for adjusting brightness levels for each universal

LED current source. The CAM current source has a 4-bit

linear DAC to adjust brightness.

The LTC3207/LTC3207-1 charge pumps optimize efficiency

based on the voltage across the LED current sources. The

device powers-up in 1x mode and will automatically switch

to boost mode whenever any enabled LED current source

begins to enter dropout. The first dropout switches the

IC into 1.5x mode and a subsequent dropout switches

the LTC3207/LTC3207-1 into 2x mode. The device resets

to 1x mode whenever a data register is updated via the

4-LED MAIN, 2-LED SUB, Dual RGB and Camera Light

■

Low Noise, Multi-Mode Charge Pump (1x, 1.5x, 2x)

Provides Up to 91% Efficiency

■

Slew Limited Switching Reduces Conducted and

Radiated Noise (EMI)

■

Up to 600mA Total Output Current

■

Twelve 28mA Universal Current Sources with

64-Step Linear Brightness Control

■

425mA CAM LED Current Source with 16-Step

Linear Brightness Control and 2-Second High

Current Safety Timer

■

Independent On/Off, Brightness Level, Blinking and

Gradation Control for Each Current Source Using

■

Internal Current Reference

■

(LTC3207 00110110, LTC3207-1 00110100)

■

Configurable ENU Pin for Asynchronous LED

On/Off Control

■

Automatic or Forced Mode Switching

■

Internal Soft-Start Limits Inrush Current

■

Short-Circuit/Thermal Protection

■

4mm × 4mm 24-Pin QFN Plastic Package

■

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners. Protected by U.S. Patents,

including 6411531.