LED2000PUR

Overview

The LED2000PUR is a monolithic step-down DC-DC converter designed for precise constant current regulation in LED lighting applications. It operates with a fixed switching frequency of 850 kHz and supports an input voltage range from 3.0 V to 18 V. The device integrates synchronous rectification to enhance efficiency and delivers a maximum output current of 3 A. Key internal parameters include a sense voltage of 100 mV and an integrated high-side MOSFET with an on-resistance of 95 mOhm. This component is housed in a VFQFPN package suitable for surface-mount technology.

Feature Summary

• Monolithic integration of the power switch and control logic for compact design
• Synchronous rectification architecture for improved conversion efficiency
• Fixed 850 kHz switching frequency enabling the use of small external passive components
• Precise constant current regulation capability for stable LED brightness

Applications

• LED lighting driver circuits
• Constant current sources for general illumination
• Battery-powered LED systems requiring efficient step-down conversion

Procurement Notes

Verify the specific suffix PUR against the manufacturer's official datasheet to confirm the tape-and-reel packaging configuration and RoHS compliance status. Ensure that the ordering information matches the exact part number required for your bill of materials, as variations may exist regarding packaging or regional certifications. Cross-reference the document revision date to ensure compatibility with current manufacturing standards.

Selection Notes

Select this component when a compact, high-efficiency solution is needed for driving LEDs from a 3 V to 18 V supply. The 850 kHz frequency allows for smaller inductors and capacitors compared to lower-frequency alternatives. Consider the thermal performance of the VFQFPN package relative to the expected load current and ambient temperature conditions to ensure reliable operation without excessive heatsinking.

Part Context

The LED2000 series represents STMicroelectronics' approach to integrated LED drivers, combining power stage and control functions into a single chip. This family targets cost-sensitive and space-constrained lighting designs. The PUR variant specifically denotes the standard production version available through authorized distribution channels, maintaining consistency with the broader LED2000 product line specifications.

Replacement Considerations

Consult official substitution guides for compatible parts within the same product family or alternative manufacturers offering similar 3 A buck converters. Verify pin-to-pin compatibility and electrical parameter alignment before replacing the original component in existing designs.

FAQ

What is the fixed switching frequency of the LED2000PUR?

The device operates at a fixed switching frequency of 850 kHz.

Does the LED2000PUR use asynchronous or synchronous rectification?

It utilizes synchronous rectification to improve efficiency.