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UCC3889 - Off-line Power Supply Controller

Download the UCC3889 datasheet PDF. This datasheet also covers the UCC1889 variant, as both devices belong to the same off-line power supply controller family and are provided as variant models within a single manufacturer datasheet.

General Description

regulated bias supply.

Ideal Primary-side Bias Supply visualized as two cascaded flyback conve

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (UCC1889-Unitrode.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number UCC3889
Manufacturer Unitrode
File Size 1.19 MB
Description Off-line Power Supply Controller
Datasheet download datasheet UCC3889 Datasheet

Full PDF Text Transcription for UCC3889 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for UCC3889. For precise diagrams, and layout, please refer to the original PDF.

Off-line Power Supply Controller UCC1889 UCC2889 UCC3889 FEATURES DESCRIPTION • Transformerless Off-line The UCC1889 controller is optimized for use as an off-line, low p...

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line The UCC1889 controller is optimized for use as an off-line, low power, low voltage, Applications regulated bias supply. The unique circuit topology utilized in this device can be • Ideal Primary-side Bias Supply visualized as two cascaded flyback converters, each operating in the discontinuous mode, and both driven from a single external power switch. The significant • Efficient BiCMOS Design benefit of this approach is the ability to achieve voltage conversion ratios of 400V • Wide Input Range to 12V with no transformer and low internal losses.

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