CAT4026V-T1

Overview

The CAT4026V-T1 is a six-channel LED controller designed for large panel backlighting. It operates with an input voltage range of 4.5 V to 5.5 V and supports ambient temperatures from -40°C to +85°C. The device integrates adaptive feedback control to interface with external switch-mode power supplies, optimizing system efficiency by monitoring minimum cathode voltages. It provides precise current regulation through external resistors connected to bipolar power transistors, reducing thermal stress on the IC. The component includes comprehensive fault protection mechanisms such as open-cathode-anode and short-cathode-anode detection.

Feature Summary

• Supports PWM and analog dimming modes for precise brightness control across all channels
• Integrates adaptive feedback control to synchronize with external SMPS for enhanced energy efficiency
• Includes dedicated logic outputs for diagnosing open-circuit and short-circuit faults

Applications

• Large panel LCD TV backlighting systems
• High-voltage LED string drivers
• Energy-efficient display backlight architectures

Procurement Notes

Verify the specific suffix 'T1' against the manufacturer's latest datasheet to confirm tape-and-reel packaging specifications. Ensure the design accommodates the SOIC-28L package thermal requirements. Confirm RoHS compliance status for the specific manufacturing batch. Validate that the external transistor selection matches the controller's drive capabilities.

Selection Notes

Select this component when designing high-voltage LED arrays requiring independent channel control without internal switching losses. It is suitable for applications where external transistors are preferred to handle high currents and dissipate heat. Consider the need for external SMPS integration if adaptive feedback efficiency is required. Ensure the PCB layout supports the SOIC-28L footprint and adequate copper area for thermal management.

Part Context

This part belongs to the CAT4026 family of LED controllers from onsemi. It shares core functionality with the standard CAT4026 but differs in packaging configuration. The family is engineered for large-panel displays, offering multi-channel constant current regulation. It distinguishes itself by offloading current handling to external components, allowing for flexible high-power designs.

Replacement Considerations

The CAT4026 is a functional equivalent. Verify pinout compatibility and package dimensions before substitution. Check if the alternative part supports the same fault diagnostic features and dimming interfaces.