UCC256402DDBR

Power Supply Controllers, Monitors Overview

The UCC256402DDBR is an LLC resonant controller from Texas Instruments designed for ultra-low audible noise and standby power applications. It operates with a half-bridge topology and supports up to one output. The device features a maximum switching frequency of 100 kHz and a maximum duty cycle of 50%. It provides a 12 V output voltage with a drive current capability of 1.2 A. Operating within a temperature range of -40°C to +125°C, it utilizes a 14-SOIC package. The controller draws 2.2 mA of operating supply current at 15 V.

Power Supply Controllers, Monitors Feature Summary

• Integrated high-voltage startup circuitry enabling operation without auxiliary windings
• Ultra-low audible noise performance through spread-spectrum frequency modulation
• Zero voltage switching control for enhanced efficiency across load ranges

Power Supply Controllers, Monitors Applications

• High-efficiency offline DC/DC converters
• Adapters and chargers requiring low standby power
• Industrial power supplies with strict acoustic noise limits

Power Supply Controllers, Monitors Procurement Notes

Verify the suffix DDBR indicates tape-and-reel packaging distinct from cut-tape variants. Confirm RoHS compliance status via the manufacturer datasheet before integration. Ensure moisture sensitivity level handling protocols are followed during assembly. Cross-reference the specific revision against the latest TI documentation to validate pinout compatibility.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing LLC resonant converters requiring minimal audible noise in consumer or industrial environments. It is suitable for applications prioritizing low standby power consumption without external auxiliary power supplies. Consider the 14-SOIC package constraints for thermal management and PCB layout requirements.

Power Supply Controllers, Monitors Part Context

This part belongs to the UCC25640x family of LLC resonant controllers. It shares core functionality with variants like the UCC256402ADDBR but differs in packaging and specific electrical tolerances. The family targets high-performance power conversion systems where acoustic silence and energy efficiency are critical design parameters.

Power Supply Controllers, Monitors Replacement Considerations

The UCC256402ADDBR serves as a direct functional substitute within the same series. Verify that the alternative variant meets the specific packaging and tolerance requirements of the existing design.

Power Supply Controllers, Monitors FAQ

Does the UCC256402DDBR require an auxiliary winding for startup?

No, it features an integrated high-voltage startup circuit that eliminates the need for an auxiliary winding.

What control method does this controller use?

It utilizes current-mode control with zero voltage switching capabilities for efficient operation.