CAT4104V-GT3

Overview

The CAT4104V-GT3 is a four-channel constant current LED driver IC manufactured by onsemi, designed for high-brightness LED applications. It features a boost topology with an input voltage range of 3 V to 5.5 V and supports output voltages up to 25 V. Each channel provides a matched low-dropout current sink capable of driving up to 175 mA, with a combined maximum output current of 700 mA across all channels. The device operates within a temperature range of -40°C to +85°C and is housed in an 8-pad TDFN 2mm x 3mm package.

Feature Summary

• Four individually addressable, matched low-dropout current sinks allow precise control of separate LED strings.
• Integrated thermal shutdown protection automatically disables outputs when junction temperature exceeds safe limits.
• Supports high-frequency PWM dimming via the EN/PWM pin for linear brightness adjustment without color shift.

Applications

• High-brightness LED lighting systems requiring long LED string configurations
• Portable electronic devices utilizing multiple independent LED channels
• General illumination circuits needing efficient constant current regulation

Procurement Notes

Verify the specific suffix 'V' against the official datasheet to confirm package type and tape/reel specifications. Ensure the ordering part number matches the required RoHS compliance status and manufacturing site. Cross-reference the component marking code with the manufacturer's identification guide to prevent counterfeit substitution during assembly.

Selection Notes

Select this component when designing circuits that require four independent LED channels driven from a single power source. It is suitable for applications where space constraints favor the compact TDFN-8 package over larger alternatives. Consider the 25 V output capability if driving series-connected LEDs that exceed standard supply voltages.

Part Context

This device belongs to the CAT4104 family of LED drivers, which are optimized for portable and general lighting applications. The family offers various packaging options including SOIC-8 and TDFN-8 to accommodate different PCB layout requirements. These drivers are engineered to provide high efficiency and reliable performance in battery-powered or low-voltage DC systems.

Replacement Considerations

Check for CAT4104 variants with different suffixes such as 'P' or 'HU' if alternative packages like SOIC-8 or UDFN-8 are required. Verify electrical compatibility before substituting with other four-channel LED drivers from different manufacturers.