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UCC1889

Part Number	UCC1889
Manufacturer	Unitrode
Description	Off-line Power Supply Controller
Published	Sep 18, 2019
Detailed Description	Off-line Power Supply Controller UCC1889 UCC2889 UCC3889 FEATURES DESCRIPTION • Transformerless Off-line The UCC188...
Datasheet	UCC1889 PDF File

Overview

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 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.
• Fixed or Adjustable Low Volt...

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