UCC3889D

AC DC Converters, Offline Switchers Overview

The UCC3889D is an off-line power supply controller manufactured by Texas Instruments, designed for flyback converter topologies. It operates within a supply voltage range of 6.6 V to 9.3 V and supports output voltages of 12 V and 18 V. The device features a fixed switching frequency of 250 kHz with a maximum duty cycle of 55%. It provides an output current capability of 200 mA and consumes 1.2 mA of operating supply current. The component is housed in an SOIC-8 surface-mount package and functions as a non-isolated PWM controller suitable for commercial temperature ranges from 0°C to +70°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrated PWM control for flyback AC/DC conversion
• Fixed 250 kHz switching frequency operation
• Built-in overcurrent protection mechanisms
• Soft-start functionality for reduced inrush current

AC DC Converters, Offline Switchers Applications

• Off-line power supply controllers
• Flyback converter designs
• AC/DC converter systems

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'D' against the manufacturer's official documentation to confirm the commercial temperature grade (0°C to +70°C) and SOIC-8 package variant. Ensure that the ordering information matches the exact part number required for your design specifications, as suffixes may indicate different thermal or packaging options. Cross-reference the datasheet revision history for any updates to electrical characteristics or recommended circuit configurations before finalizing procurement.

AC DC Converters, Offline Switchers Selection Notes

Select this component when designing flyback converters requiring a fixed 250 kHz switching frequency and integrated protection features. It is suitable for applications needing a 200 mA output drive capability within a compact SOIC-8 footprint. Consider the 6.6 V to 9.3 V supply voltage range and the 0°C to +70°C operating temperature limits during system planning. Evaluate the 55% maximum duty cycle constraint to ensure compatibility with the intended transformer turns ratio and input voltage range.

AC DC Converters, Offline Switchers Part Context

The UCC3889D belongs to the UCC3889 series of off-line power supply controllers from Texas Instruments. This family focuses on providing efficient and reliable control solutions for flyback topologies. The series integrates essential functions such as current limit and soft-start into a single chip, simplifying the design process for AC/DC converters. The UCC3889D specifically represents the commercial grade version packaged in SOIC-8.

AC DC Converters, Offline Switchers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.