ADM8845ACP-REEL7

Overview

The ADM8845ACP-REEL7 is a charge pump driver IC designed for LCD white LED backlights. It drives six LEDs from an input supply ranging from 2.6 V to 5.5 V, compatible with Li-Ion sources. The device utilizes a fractional charge pump topology offering 1x, 1.5x, and 2x modes to maximize power efficiency. Key electrical specifications include a maximum LED current matching of 1% and up to 88% power efficiency over the Li-Ion voltage range. It supports individual shutdown for main and sub-display LEDs and features soft-start limiting in-rush current.

Feature Summary

• Drives six LEDs using fractional charge pump technology (1x/1.5x/2x) for optimized power efficiency
• Provides high precision with a maximum LED current matching of 1%
• Supports independent shutdown control for main and sub-display LED channels
• Integrates soft-start functionality to limit in-rush current during startup

Applications

• LCD white LED backlighting systems
• Mobile phone display illumination
• Portable electronic devices requiring efficient LED drivers

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm the specific suffix matches the required package and reel configuration. Check for end-of-life status or obsolescence notices prior to procurement. Ensure compliance with RoHS directives if applicable to your manufacturing requirements. Validate that the supplier provides valid traceability documentation for quality assurance purposes.

Selection Notes

Select this component when designing LED backlight circuits for portable displays powered by single-cell Li-Ion batteries. The wide input voltage range accommodates battery discharge profiles without external regulation. The compact QFN footprint minimizes board space usage. Consider the fractional pump options to balance efficiency against output voltage requirements for series-connected LEDs.

Part Context

This part belongs to the ADM8845 family of charge pump drivers manufactured by Analog Devices. It is specifically engineered for driving multiple white LEDs in series for LCD applications. The device integrates the necessary control logic and power switches into a small form factor, reducing external component count compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.