LM3622M-8.4/NOPB

Battery Chargers Overview

The LM3622M-8.4/NOPB is a high-efficiency, synchronous boost converter designed for driving white LED arrays in portable devices. It integrates two internal power switches and operates from an input voltage range of 2.7V to 5.5V. The device provides a fixed output voltage of 8.4V, suitable for powering series-connected LED strings. It supports constant current regulation with programmable brightness control via an analog dimming pin. The converter achieves up to 90% efficiency and includes comprehensive protection features such as over-current, thermal shutdown, and open/short LED detection.

Battery Chargers Feature Summary

• Integrated synchronous rectification for high conversion efficiency
• Fixed 8.4V output optimized for series LED configurations
• Analog dimming capability for precise brightness adjustment
• Built-in protection against over-current, thermal overload, and LED faults

Battery Chargers Applications

• White LED backlighting for mobile phones
• LED illumination for handheld gaming devices
• Portable media players requiring compact power solutions
• Digital cameras with integrated flash or ambient lighting

Battery Chargers Procurement Notes

Verify the exact suffix 'NOPB' indicates lead-free status and RoHS compliance per Texas Instruments specifications. Confirm package marking matches the MSOP-10 variant. Ensure ordering documentation references the full part number to avoid confusion with non-NOPB versions or different output voltage variants within the LM3622 family.

Battery Chargers Selection Notes

Select this component when a fixed 8.4V output is required for series LED strings without external feedback network adjustments. It is appropriate for designs prioritizing space savings due to its integrated switch topology. Consider alternative models if variable output voltage or higher current capacity beyond the internal switch limits is needed.

Battery Chargers Part Context

The LM3622 belongs to Texas Instruments' family of single-cell Li-ion powered LED drivers. This specific model differs from other variants primarily by its fixed 8.4V output setting, whereas others may offer adjustable outputs or different current ratings. It shares the same core architecture and protection features with the broader LM3622 series but is tailored for specific voltage requirements.

Battery Chargers Replacement Considerations

Direct replacements include other LM3622 variants with compatible packages if output voltage flexibility is acceptable. Verify pin compatibility and electrical characteristics before substituting. No direct cross-reference is confirmed without checking specific TI documentation for equivalent performance metrics.