MSL2021-INR

Overview

The MSL2021-INR is an obsolete LED lighting driver IC manufactured by Microchip Technology. It functions as a two-string driver featuring automatic Correlated Color Temperature (CCT) control via a Look-Up Table (LUT). The device supports AC/DC offline switching topologies, including flyback and buck configurations, with PWM dimming capabilities. It operates within a supply voltage range of 9.5V to 15V and is housed in a 24-VQFN (4x4) package. The component is rated for an operating temperature range of -40°C to 105°C.

Feature Summary

• Integrates automatic CCT control utilizing a Look-Up Table for precise color temperature management across dual output strings.
• Supports multiple offline AC/DC converter topologies, specifically flyback and step-down (buck) architectures for flexible power stage design.
• Enables high-fidelity light output adjustment through Pulse Width Modulation (PWM) dimming interfaces.

Applications

• LED lighting systems requiring dynamic color temperature adjustment
• Offline AC/DC power supplies for solid-state lighting fixtures
• General illumination applications utilizing flyback or buck converter topologies

Procurement Notes

This specific part number is officially obsolete and no longer in production by the manufacturer. Procurement efforts should focus on identifying verified parameter-equivalent substitutes available from authorized distributors. Verify that any replacement component matches the original electrical specifications, pinout compatibility, and thermal requirements before integration into existing designs.

Selection Notes

Designers must account for the discontinued status of this component when initiating new projects. Selection criteria should prioritize functional equivalents that maintain the same dual-output architecture and LUT-based CCT control features. Ensure the substitute device supports the required flyback or buck topology and fits within the specified 9.5V to 15V supply voltage constraints while adhering to the -40°C to 105°C operating temperature range.

Part Context

The MSL2021-INR belongs to the MSL202x series of LED drivers from Microchip Technology, which are engineered for advanced lighting control applications. This series emphasizes integrated color management and efficient power conversion for modern LED fixtures. The component represents a specialized solution for manufacturers requiring automated color tuning without external microcontroller intervention for basic CCT adjustments.

Replacement Considerations

Publicly confirmed parameter-equivalent substitutes include the MSL2021-IN and MSL2024-IN. These alternatives offer similar functionality but require verification of package compatibility and specific application parameters against the original datasheet requirements.

FAQ

What control mechanism does the MSL2021-INR use for color temperature adjustment?

It utilizes an internal Look-Up Table (LUT) to automate Correlated Color Temperature (CCT) control across its two output strings.

Which power converter topologies are supported by this IC?

The device supports both flyback and step-down (buck) topologies for AC/DC offline switching applications.