LTC3220IPF

LED Driver IC Overview

The LTC3220IPF is a highly integrated multi-display LED driver featuring eighteen 20mA universal current sources. It operates with an input voltage range of 2.9V to 5.5V and delivers a total output current capability of 360mA. The device utilizes a low-noise charge pump topology for power regulation. Control is managed via a two-wire I²C interface, allowing independent on/off switching, brightness adjustment, blinking, and gradation control for each channel. The unit is housed in a 28-pin UTQFN package.

LED Driver IC Feature Summary

• Integrates eighteen independent 20mA universal LED current sources
• Provides individual channel control for dimming, blinking, and grayscale via I²C interface
• Features an adaptive charge pump that optimizes efficiency by switching between 1x, 1.5x, and 2x modes based on dropout conditions

LED Driver IC Applications

• Multi-display LED lighting systems
• Display backlight drivers
• Indicator light arrays requiring precise per-channel control

LED Driver IC Procurement Notes

Verify the specific suffix (e.g., #PBF or #TRPBF) against the required packaging format, as the base model number may correspond to different shipping configurations. Confirm that the 28-lead UTQFN footprint matches the target PCB layout. Ensure the design supports the 2.9V to 5.5V input range and I²C communication requirements specified in the official datasheet.

LED Driver IC Selection Notes

Select this component when designing systems requiring high channel density with individual current source control. The integrated charge pump eliminates the need for external inductors, reducing board space. Consider the thermal performance of the UTQFN package for the intended application environment. Verify compatibility with the host controller's I²C bus speed and address configuration capabilities.

LED Driver IC Part Context

The LTC3220 series belongs to Analog Devices' portfolio of specialized LED driver ICs designed for complex display applications. It replaces discrete solutions by combining power management and current regulation into a single chip. The family includes variants like the LTC3220-1, which may offer slight functional differences, but the core architecture remains focused on efficient, programmable multi-channel LED driving.

LED Driver IC Replacement Considerations

Direct substitutes include the LTC3220IPF#PBF and LTC3220IPF-1#PBF. Verify pinout compatibility and electrical specifications before swapping. The LTC3220-1 variant should be checked for any specific feature deviations from the standard LTC3220.