LTC3212

• Product introduction

LTC3212RGB LEDdriveand charge

peculiarity

• Power and Current Control for Driving RGB LEDs Power and current control to drive RGB LEDs
• Individually Programmable Current Sources Independent programmable current source
• 1x or 2x Mode, Low Noise, Constant Frequency Charge Pump 1x or 2x mode, low noise, constant frequency charge pump
• Single Wire Enable Control for All LEDs Single-wire control of all LEDs enabled
• White Mode Adjusts R, G, B Currents for White LightBlack and white mode adjustment of R, G, B current white light
• 25mA Maximum LED Current25 mA maximum LED current
• VIN Range: 2.7V to 5.5VVIN range: 2.7V to 5.5V
• Automatic Soft-Start, Mode Switching and Output Disconnect in Shutdown ModeAutomatic soft-start, mode conversion and output disconnection in shutdown mode
• Available in 12-Lead (3mm × 2mm) DFN PackageAvailable in 12-lead (3 mm × 2 mm) DFN packages
• description

  The LTC3212 is a low noise charge pump RGB LED driver capable of driving three LEDs up to 25mA each from a 2.7V to 5.5V input.The LTC3212 is a low noise charge pump RGB LED driver capable of driving three LEDs from 2.7V to 5.5V inputs to 25mA each. Low external part count (one flying capacitor, two bypass capacitors and one to three programming resistors) makes the LTC3212 ideally suited for small, battery-powered applications.The low external component count (one jump capacitor, two bypass capacitors, and one to three years of programming resistance) makes the LTC3212 ideal for small, battery-powered applications.

  Built-in soft-start circuitry prevents excessive inrush current during start-up and mode switching.Built-in soft-start circuitry prevents excessive inrush current during start-up and mode switching. High switching frequency enables the use of small external capacitors.The high switching frequency allows the use of small external capacitors. The charge pump shuts down to a high impedance mode to prevent LED leakage while the LTC3212 is off.The charge pump is turned off to prevent leakage of the LEDs, while the LTC3212 is off in a high impedance mode.

  Each LED may be individually turned on or off via a single pin interface.Each LED can be turned on or off individually via a single-pin interface. The current through the LEDs may be individually programmed with resistors or may share a single programming resistor.The current through the LED can be individually programmed resistors or may share a single programming resistor. White mode adjusts the red, green and blue LED current ratios for a white light when all three LEDs are programmed to be on.When the monochrome mode adjustment is programmed, all three indicators are the current ratio of red, green, and blue LED white light.

  LED currents are regulated using internal low dropout current sources.LED current regulation using an internal low-dropout current source. Automatic mode switching optimizes effi ciency by monitoring the LED current drivers and switches mode only when dropout is detected.Automatic mode switching optimizes efficiency by monitoring LED current drivers and switching modes only when detected dropouts. The part is available in a 3mm × 2mm 12-lead DFN package.Part is available in a 3mm×2mm 12-lead DFN package

  apply

  • Cellular Phonescell phone
  • Media PlayersMedia player
  • RGB Back LightsRGB backlight