UCC2804DTR/81260G4

Overview

The UCC2804DTR/81260G4 is a low-power BiCMOS current-mode PWM controller manufactured by Texas Instruments. It operates within a supply voltage range of 8.3V to 12V and features a switching frequency up to 1 MHz. The device supports Boost, Flyback, and Forward topologies with a maximum duty cycle of 50%. It is housed in an 8-SOIC package and functions within a temperature range of -40°C to 85°C.

Feature Summary

• Implements current-mode pulse width modulation control for efficient power regulation
• Designed for low-power applications using BiCMOS technology
• Supports multiple converter topologies including boost, flyback, and forward

Applications

• Offline switcher designs
• Flyback converters
• Forward converters
• Boost converters

Procurement Notes

Verify the specific suffix '81260G4' against official Texas Instruments documentation to confirm it denotes a standard RoHS-compliant tape-and-reel variant without functional deviations from the base UCC2804DTR specification. Ensure compatibility with required operating temperatures and packaging standards before procurement.

Selection Notes

Select this component for offline power supplies requiring low quiescent current and high-frequency operation. It is suitable for applications where space constraints favor the SOIC-8 package and where current-mode control offers stability advantages over voltage-mode architectures.

Part Context

This part belongs to the UCC280x series of low-power PWM controllers. It shares architectural similarities with the UCC3804 but is optimized for lower power consumption. The series is widely used in cost-sensitive AC/DC conversion systems.

Replacement Considerations

The UCC3804DTR is a pin-compatible alternative within the same family. Verify if the higher power handling or different temperature range of the UCC3804 series meets specific design requirements.