CAT3644HV3G

Overview

The CAT3644HV3G is a high-voltage LED driver integrated circuit manufactured by onsemi. It features three independent constant-current output channels designed for driving LED strings in lighting applications. The device supports a wide supply voltage range, accommodating high input voltages typical in automotive and industrial environments. It utilizes a thermal shutdown mechanism to protect against overheating conditions during operation.

Feature Summary

• Three-channel constant current regulation for precise LED control
• High-voltage tolerance suitable for demanding power environments
• Integrated thermal protection circuitry for operational safety

Applications

• Automotive exterior lighting systems
• Industrial high-bay LED fixtures
• General illumination arrays requiring high voltage inputs

Procurement Notes

Verify the specific suffix 'G' indicates lead-free packaging compliance with RoHS standards. Confirm the package type matches the required PCB footprint. Check the manufacturer's lifecycle status as older high-voltage drivers may be subject to production changes or obsolescence notices. Ensure the datasheet version aligns with the intended design specifications.

Selection Notes

Select this component when designing circuits that require simultaneous control of multiple LED strings from a single high-voltage source. Consider the maximum allowable junction temperature and the need for external heat sinking if operating near thermal limits. Evaluate the compatibility of the control interface with the system microcontroller or logic levels.

Part Context

This part belongs to the CAT364x series of high-voltage LED drivers from onsemi. These devices are engineered to simplify LED ballast designs by integrating multiple channels into a single package. The series targets applications where space constraints and efficiency are critical, offering a compact solution compared to discrete transistor-based drivers.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official cross-reference guides or contact the manufacturer directly for verified alternatives.