ADM8845ACPZ-REEL7

Overview

The ADM8845ACPZ-REEL7 is a charge pump driver IC designed for LCD white LED backlights. It drives six LEDs from an input supply of 2.6 V to 5.5 V, typical of Li-Ion batteries. The device incorporates a fractional charge pump with 1x, 1.5x, and 2x modes to maximize power efficiency. It features up to 88% power efficiency over the Li-Ion range and ensures 1% maximum LED current matching. The component operates in a 16-pin HVQCCN package measuring 3 mm x 3 mm with a height of 0.9 mm.

Feature Summary

• Utilizes fractional charge pump technology (1x/1.5x/2x) to optimize power efficiency across varying input voltages.
• Provides precise current regulation with a maximum 1% LED current matching tolerance.
• Supports individual shutdown control for main and sub-display LEDs to minimize power consumption.
• Integrates soft-start functionality to limit in-rush current during startup.

Applications

• LCD white LED backlighting for mobile phones
• Digital still cameras (DSC)
• Miniature TFT color displays
• Video lighting equipment

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity as the part is discontinued by the manufacturer. Ensure compatibility with existing PCB footprints before procurement. Check for alternative sourcing options if long-term availability is required. Validate datasheet revisions against specific production batches.

Selection Notes

Select this component for applications requiring high-efficiency LED driving from single-cell lithium-ion sources. The compact footprint suits space-constrained portable devices. Consider the specific charge pump mode requirements for optimal efficiency. Evaluate thermal management needs based on the small package size. Verify that the 1% current matching meets display uniformity specifications.

Part Context

This part belongs to the ADM8845 series of LED drivers from Analog Devices. It is specifically engineered for portable electronics needing efficient backlight solutions. The REEL7 suffix indicates tape and reel packaging for automated assembly. It replaces older discrete LED driver designs with an integrated solution.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The product is listed as End-of-Life with discontinuation notifications. Designers should evaluate pin-compatible alternatives or redesign circuits for newer generation drivers.