LTC3212 - LTC3212 是RGB LED Driver and Charge Pump

LTC3212是LINEAR凌力尔特公司的一款无电感器型 (充电泵) LED 驱动器产品，LTC3212是LTC3212 是RGB LED Driver and Charge Pump，本站介绍了LTC3212的封装应用图解、特点和优点、功能等，并给出了与LTC3212相关的LINEAR元器件型号供参考。

LTC3212 - LTC3212 是RGB LED Driver and Charge Pump - 无电感器型 (充电泵) LED 驱动器 - 电源管理 - 凌力尔特

LTC3212 - RGB LED Driver and Charge Pump

LTC3212 - RGB LED Driver and Charge Pump - Linear Technology（凌力尔特）

功能描述

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. 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.

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 charge pump shuts down to a high impedance mode to prevent LED leakage while the LTC3212 is off.

Each LED may be individually turned on or off via a single pin interface. The current through the LEDs may be individually programmed with 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.

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

特点

Power and Current Control for Driving RGB LEDs

Individually Programmable Current Sources

1x or 2x Mode, Low Noise, Constant Frequency Charge Pump

Single Wire Enable Control for All LEDs

White Mode Adjusts R, G, B Currents for White Light

25mA Maximum LED Current

VIN Range: 2.7V to 5.5V

Automatic Soft-Start, Mode Switching and Output Disconnect in Shutdown Mode

Available in 12-Lead (3mm × 2mm) DFN Package

应用

Cellular Phones