UCC256402DDBT

Power Supply Controllers, Monitors Overview

The UCC256402 is a resonant controller IC designed for LLC and series-resonant converters. It integrates a high-voltage current source to drive external GaN FETs, eliminating the need for isolated gate drivers. The device supports primary-side regulation with an integrated optocoupler driver interface. Key electrical parameters include a switching frequency range up to 1 MHz, a maximum duty cycle of 50%, and an operating supply voltage range of 8V to 30V. It features programmable soft-start, frequency foldback, and over-current protection mechanisms.

Power Supply Controllers, Monitors Feature Summary

• Integrated high-voltage current source for direct GaN FET driving
• Primary-side regulation capability with optocoupler feedback interface
• Built-in protection features including over-current and thermal shutdown

Power Supply Controllers, Monitors Applications

• LLC resonant converter topologies
• Series-resonant power supplies
• High-efficiency adapter designs using GaN transistors

Power Supply Controllers, Monitors Procurement Notes

Verify the specific ordering suffix (e.g., DDBT) against the manufacturer's official datasheet to confirm package type, tape-and-reel specifications, and temperature grade. Ensure that the requested part number matches the exact pinout and functional requirements of the target design before procurement.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing LLC or series-resonant converters requiring simplified gate drive solutions. It is suitable for applications leveraging GaN technology to achieve higher efficiency and power density. Consider its integration of primary-side regulation if isolated feedback loops are desired to reduce component count.

Power Supply Controllers, Monitors Part Context

This device belongs to Texas Instruments' family of resonant controllers aimed at modernizing power supply architectures. It addresses the complexity of driving wide-bandgap semiconductors by integrating necessary drive circuitry directly into the control IC, thereby reducing board space and assembly steps compared to traditional discrete driver approaches.

Power Supply Controllers, Monitors Replacement Considerations

Consult the official TI replacement matrix for verified cross-reference part numbers. Do not assume compatibility based on pinout alone; verify electrical characteristics and control logic alignment with the original design requirements.