LTC3220
LTC3220-1
Info: : PRODUCTION
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LTC3220
LTC3220-1

360mA Universal 18-Channel LED Driver

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 8
1ku List Price Starting From $3.12
Features
  • Eighteen 20mA Universal Current Sources with 64-Step Linear Brightness Control
  • Independent On/Off, Brightness Level, Blinking and Gradation Control for Each Current Source Using 2-Wire I2C Interface
  • 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 360mA Total Output Current
  • Internal Current Reference
  • Single Reset Pin for Asynchronous Shutdown and Reset of All Data Registers
  • Two I2C Addresses Are Available (LTC3220: 0011100, LTC3220-1: 0011101)
  • Automatic or Forced Mode Switching
  • Internal Soft-Start Limits Inrush Current
  • Short-Circuit/Thermal Protection
  • 4mm × 4mm Ultrathin (0.55mm) 28-Lead QFN Package
Additional Details
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The LTC3220/LTC3220-1 are highly integrated multi-display LED drivers. These parts contain a high efficiency, low noise charge pump to provide power to up to eighteen universal LED current sources. The LTC3220/LTC3220-1 require only five small ceramic capacitors to form a complete LED power supply and current controller.

The LED 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 to adjust brightness levels independently for each universal LED current source.

The LTC3220/LTC3220-1 charge pump optimizes efficiency based on the voltage across the LED current sources. The part 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 parts into 1.5x mode and a subsequent dropout switches the LTC3220/LTC3220-1 into 2x mode. The parts reset to 1x mode whenever a data bit is updated via the I2C port.

Applications

  • Video Phones with QVGA+ Displays
  • Keypad Lighting
  • General/Miscellaneous Lighting
Part Models 8
1ku List Price Starting From $3.12

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3220EPF#PBF
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LTC3220EPF#TRPBF
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LTC3220EPF-1#PBF
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LTC3220EPF-1#TRPBF
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LTC3220IPF#PBF
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LTC3220IPF#TRPBF
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LTC3220IPF-1#PBF
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LTC3220IPF-1#TRPBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC1265A-B

LTC3220EPF-1 | 360mA General Purpose LED Driver (Requires DC590)

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DC1265A-B

LTC3220EPF-1 | 360mA General Purpose LED Driver (Requires DC590)

LTC3220EPF-1 | 360mA General Purpose LED Driver (Requires DC590)

Product Detail

Demonstration circuit 1265 is a 360mA (20mA per LED) Universal 18-Channel LED Driver with twelve white LEDs and two RGB LEDs featuring the LTC3220/LTC3220-1. The LTC3220/LTC3220-1 is a low noise boost charge pump designed to drive 18 universal LED (ULED) current sources. The charge pump automatically switches between 1x, 1.5x and 2x modes to provide the necessary output voltage. The demo board input supply voltage range is 2.9V to 5.5V. DC1265A-A features the LTC3220, and DC1265A-B features the LTC3220-1. The two parts have different I2C addresses, allowing both devices to be used in a system if more than 18 LED drivers are needed./p>

The DC1265 requires the DC590 controller board for proper operation. The 18 LEDs are includes on the demo board. The LTC3220/LTC3220-1 features include On/Off blinking, gradation, intensity, and a software controlled shutdown, which are accomplished via an I2C serial interface. There are 64 dimming states available for the universal LEDs.

reference details image

DC1265A-A

LTC3220EPF Demo Board | 18-LED Boost Charge Pump LED Driver, 2.9V ≤ VIN ≤ 5.5V, VLED up to 5V at 20mA per LED (DC590 Requires)

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DC1265A-A

LTC3220EPF Demo Board | 18-LED Boost Charge Pump LED Driver, 2.9V ≤ VIN ≤ 5.5V, VLED up to 5V at 20mA per LED (DC590 Requires)

LTC3220EPF Demo Board | 18-LED Boost Charge Pump LED Driver, 2.9V ≤ VIN ≤ 5.5V, VLED up to 5V at 20mA per LED (DC590 Requires)

Product Detail

Demonstration circuit 1265 is a 360mA (20mA per LED) Universal 18-Channel LED Driver with twelve white LEDs and two RGB LEDs featuring the LTC3220/LTC3220-1. The LTC3220/LTC3220-1 is a low noise boost charge pump designed to drive 18 universal LED (ULED) current sources. The charge pump automatically switches between 1x, 1.5x and 2x modes to provide the necessary output voltage. The demo board input supply voltage range is 2.9V to 5.5V. DC1265A-A features the LTC3220, and DC1265A-B features the LTC3220-1. The two parts have different I2C addresses, allowing both devices to be used in a system if more than 18 LED drivers are needed.


The DC1265 requires the DC590 controller board for proper operation. The 18 LEDs are includes on the demo board. The LTC3220/LTC3220-1 features include On/Off blinking, gradation, intensity, and a software controlled shutdown, which are accomplished via an I2C serial interface. There are 64 dimming states available for the universal LEDs.

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