LTC3207 Series

600mA Universal Multi-Output LED/CAM Driver

Catalog

600mA Universal Multi-Output LED/CAM Driver

Part	Frequency	Internal Switch(s)	Package / Case	Mounting Type	Type	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Number of Outputs	Topology	Dimming	Current - Output / Channel [custom]	Voltage - Supply (Max)	Voltage - Supply (Min) [Min]
Analog Devices LTC3207EUF#PBF	850 kHz		24-WFQFN Exposed Pad	Surface Mount	DC DC Regulator	85 °C	-40 °C	24-QFN (4x4)	13	Switched Capacitor (Charge Pump)	Analog	50 mA 425 mA	5.5 V	2.9 V
Analog Devices LTC3207EUF-1#TRPBF	850 kHz		24-WFQFN Exposed Pad	Surface Mount	DC DC Regulator	85 °C	-40 °C	24-QFN (4x4)	13	Switched Capacitor (Charge Pump)	Analog	50 mA 425 mA	5.5 V	2.9 V

Catalog

600mA Universal Multi-Output LED/CAM Driver

Key Features

• 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 2-Wire I2C Interface

• Internal Current Reference

• Two I2C Addresses are Available (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

Description

The LTC3207/LTC3207-1 are highly integrated multi-display LED drivers. The device contains a high-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. In addition there are two I2C addresses available.The display currents are set by an internal precision current reference. Independent dimming, On/Off, blinking and gradation control for all universal current sources is achieved via the I2C serial interface. 6-bit linear DACs are 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 theI2C port.ApplicationsVideo Phones with QVGA+ Displays