CAT3647HV3-GT2

Overview

The CAT3647HV3-GT2 is a three-channel regulated LED driver IC manufactured by onsemi. It employs a switched capacitor (charge pump) topology to drive LEDs from a single supply voltage ranging from 2.5V to 5.5V. The device provides independent current regulation for each of its three channels, with a maximum output current of 60mA per channel. It operates within an ambient temperature range of -40°C to +85°C and is housed in a compact 16-TQFN package.

Feature Summary

• Integrates three independent regulated current sources for precise LED brightness control
• Utilizes an internal charge pump topology to boost voltage for driving series LED strings
• Supports multi-step dimming functionality for flexible lighting applications

Applications

• Backlighting for portable electronic devices
• General LED illumination circuits
• Low-power indicator lighting systems

Procurement Notes

Verify component authenticity through authorized distributors or certified secondary market suppliers due to the part's discontinued status. Confirm that the specific suffix matches the required packaging configuration. Review the latest datasheet for any updates regarding pin compatibility or thermal characteristics before finalizing design integration.

Selection Notes

Select this component when designing circuits requiring three independently controlled LED channels from a low-voltage source. Ensure the input voltage range aligns with the system battery or supply specifications. Consider the thermal performance of the TQFN package relative to the total power dissipation of the connected loads.

Part Context

This device belongs to the CAT3647 family of LED drivers, which are designed for efficient light management in space-constrained applications. The HV3 suffix typically denotes specific manufacturing revisions or packaging variants within the broader product line, ensuring consistency with established onsemi design guidelines for low-noise operation.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official obsolescence notices or contact the manufacturer directly for recommended alternatives.