SSL5021BTS/1X

Overview

The SSL5021BTS/1X is a highly integrated, non-isolated buck controller designed for universal mains non-dimmable LED lighting applications. It operates in Boundary Conduction Mode (BCM) with on-time regulation to provide constant output current control with high accuracy. The device features adaptive switching frequency, allowing freedom in inductor selection to optimize size, efficiency, and EMI performance. It supports an output current of up to 93 mA and is intended for LED lamps up to 25 W.

Feature Summary

• Boundary Conduction Mode operation with on-time regulation for precise constant current control
• Adaptive switching frequency enables flexible inductor optimization for size and efficiency
• High power factor and low Total Harmonic Distortion (THD) design for universal mains input
• Non-isolated buck topology with external MOSFET integration

Applications

• Universal mains non-dimmable LED lamp drivers
• LED lighting applications up to 25 W
• High power factor LED driver designs
• Low THD LED illumination systems

Procurement Notes

Verify the specific suffix '1X' against the manufacturer's official documentation to confirm exact pinout, thermal characteristics, and compliance status. Ensure the component matches the required BCM controller specifications for your non-isolated buck topology. Cross-reference the ordering part number with NXP's current product availability lists, as older revisions may have limited supply or end-of-life status.

Selection Notes

Select this component for non-isolated LED driver designs requiring high power factor and low THD without galvanic isolation. The adaptive switching frequency feature allows designers to balance inductor size against electromagnetic interference requirements. Verify that the external MOSFET selected can handle the peak currents associated with the BCM operation mode and the target output power level of up to 25 W.

Part Context

The SSL5021BTS/1X belongs to NXP's SSL5021 family of LED lighting controllers. This family focuses on providing efficient, compact solutions for non-dimmable LED applications. The device integrates essential control loops for constant current regulation while minimizing external component count, making it suitable for cost-sensitive and space-constrained lighting products.

Replacement Considerations

Consult NXP's official replacement guide for direct substitutes. Generic LED controllers may not support the specific BCM on-time regulation or adaptive frequency characteristics of the SSL5021BTS/1X. Verify compatibility with existing PCB layouts and thermal management strategies before substituting.