CL2K4-G

Overview

The CL2K4-G is a high-voltage, temperature-compensated constant-current LED driver IC manufactured by Microchip Technology. It provides a fixed output current of 20 mA with ±10% trimming accuracy. The device supports an input voltage range from 5 V to 90 V and operates within a junction temperature range of -40°C to +125°C. Packaged in a TO-252 (DPAK) surface-mount format, it utilizes high-side sensing and requires an external MOSFET for operation.

Feature Summary

• Temperature compensated constant current source
• High-side sensing architecture
• Requires external MOSFET

Applications

• LED lighting systems requiring stable current regulation
• Industrial illumination applications
• General-purpose LED drivers

Procurement Notes

Verify component authenticity through authorized Microchip distributors or certified partners. Confirm the specific suffix 'G' indicates RoHS compliance as per official datasheets. Check for End-of-Life status updates directly from the manufacturer before finalizing procurement plans to ensure supply continuity.

Selection Notes

Select this component when a fixed 20 mA output is required for LED strings. Ensure the design accommodates an external N-channel MOSFET due to the high-side sensing topology. Verify that the application input voltage remains within the 5 V to 90 V operational window and that thermal management supports the specified operating temperature range.

Part Context

This part belongs to the CL2 series of LED drivers from Microchip Technology. The series focuses on high-voltage, linear LED driving solutions with integrated temperature compensation to maintain consistent brightness across varying thermal conditions. It serves as a specialized solution for single-channel LED control in robust industrial environments.

Replacement Considerations

Consult Microchip's official cross-reference tools for verified substitutes. Generic equivalents may not replicate the specific temperature compensation characteristics or high-side sensing requirements of the original design.

FAQ

Does the CL2K4-G include an internal switching transistor?

No, the device requires an external MOSFET to handle the load current.

What is the output current tolerance?

The output current is trimmed to provide 20 mA with a ±10% accuracy.