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UCC28742DBVR AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

UCC28742DBVR product

UCC28742DBVR

AC DC Converters

offline flybackoptocoupler feedbackDCMvalley switchingSOT-23-6AC/DC controller

UCC28742DBVR is a compact offline flyback controller for isolated AC/DC supplies requiring optocoupler-based constant-voltage feedback and primary-side current limiting.

Best for

  • Isolated low-power to medium-power flyback AC/DC supplies
  • Designs using optocoupler voltage feedback
  • Applications benefiting from DCM valley switching

Avoid if

  • A controller with an integrated primary MOSFET is required
  • The design cannot provide a suitable auxiliary winding for VS and VDD functions
  • Normal startup requires constant-current operation longer than the overload delay

Check before use

  • Confirm MOSFET voltage and current ratings including leakage-spike margin
  • Validate VS waveform ringing and demagnetization timing
  • Confirm no-load frequency and VDD margin against UVLO

Key specifications

Package
SOT-23-6 (DBV)
Feedback
Optocoupler-based constant-voltage feedback
Operating mode
DCM with valley switching
Switching frequency
200 Hz typ minimum to 105 kHz typ maximum
VDD operating range
9 V to 35 V
Overload delay
120 ms typ

Compliance & Environment

RoHS
ROHS3 Compliant
REACH
-
MSL
Level-1-260C-UNLIM
ECCN
-
HTSUS
-

Application

Isolated AC/DC flyback suppliesIndustrial and medical power suppliesSmart-meter and equipment bias supplies

Datasheet

sszt636

800 KB

Datasheet AI

CAD Models

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Where to Buy

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Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

UCC28742DBVR is a Texas Instruments offline flyback PWM controller in a 6-pin SOT-23 package. It drives an external MOSFET and uses optocoupler feedback for constant-voltage regulation.