UCC256404DDBT

Power Supply Controllers, Monitors Overview

The UCC256404DDBT is an LLC resonant controller from Texas Instruments, designed for high-efficiency power conversion. It features ultra-low power and ultra-quiet standby operation with integrated X-capacitor discharge. The device supports half-bridge topology and operates within a frequency range of 35 kHz to 1 MHz. It provides a typical gate drive current of 0.6 A and maintains a maximum duty cycle of 50%. The component functions reliably across an operating temperature range of -40°C to +125°C and utilizes a 14-pin SOIC package.

Power Supply Controllers, Monitors Feature Summary

• Integrates high-voltage startup circuitry for simplified design
• Supports zero voltage switching for enhanced efficiency
• Includes built-in X-capacitor discharge functionality

Power Supply Controllers, Monitors Applications

• Universal input AC-DC adapters
• Server and workstation power supplies
• Telecommunications equipment power systems

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix DDBT against official datasheets to confirm the tape-and-reel packaging configuration. Ensure compatibility with the target PCB footprint for the 14-SOIC package. Cross-reference the manufacturer part number directly with authorized distributors to avoid counterfeit components. Confirm that the ordering information matches the exact electrical specifications required for the application design.

Power Supply Controllers, Monitors Selection Notes

Select this controller for applications requiring strict standby power limits and high efficiency under light loads. The integrated high-voltage startup reduces external component count compared to standard LLC controllers. Consider the thermal performance of the SOIC package relative to the expected power dissipation in the final enclosure design.

Power Supply Controllers, Monitors Part Context

This component belongs to the UCC25640x family of LLC resonant controllers. These devices are engineered to meet stringent energy efficiency standards for offline power supplies. The family shares common control algorithms but varies in pinout and specific feature sets to accommodate different transformer designs and isolation requirements.

Power Supply Controllers, Monitors Replacement Considerations

Consult official substitution guides for verified alternatives within the same product family. Ensure any replacement maintains the 14-SOIC form factor or requires appropriate adapter considerations.