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UC3843BNG-TUDI AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

UC3843BNG-TUDI product

UC3843BNG-TUDI

Component

UC3843PWM controllerCurrent modeDIP-8Offline powerDC-DC converter

UC3843BNG-TUDI is a DIP-8 current-mode PWM controller for offline and DC-DC converter designs requiring UC3843-style low-threshold UVLO and up to 100% duty cycle.

Best for

  • Offline switch-mode power supplies
  • Current-mode DC-DC converters
  • DIP-8 controller replacements where the exact UC3843 behavior is verified

Avoid if

  • A confirmed RoHS, REACH, automotive, or lifecycle declaration is required
  • A controller with integrated soft-start or modern protection features is required

Check before use

  • Verify the exact DIP-8 pinout
  • Confirm UVLO thresholds for the auxiliary supply
  • Validate current-sense filtering and peak-current limit
  • Confirm switching frequency and compensation stability

Key specifications

Package
DIP-8
UVLO start threshold
8.4 V typical
Maximum duty cycle
100% maximum
Reference output
5.0 V typical
Current-sense threshold
1.0 V typical

Compliance & Environment

RoHS
-
REACH
-
MSL
-
ECCN
-
HTSUS
-

Application

Offline power conversionDC-DC convertersMOSFET gate drive

Datasheet

fa6116f21cf32a470e3bf18448832036_UC3843BNG-TUDI.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for UC3843BNG-TUDI: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol
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PCB Footprint
Land pattern for PCB layout
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3D Model
STEP file for mechanical design
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KiCad Library
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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

UC3843BNG-TUDI is a TD fixed-frequency current-mode PWM controller supplied in a DIP-8 package. It integrates a 5 V reference, oscillator, error amplifier, current-sense comparator, UVLO function, and totem-pole output driver.