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UC3843N-TUDI AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

UC3843N-TUDI product

UC3843N-TUDI

Component

PWM controllercurrent-mode controlDIP8off-line powerDC-to-DC

UC3843N-TUDI is a DIP8 current-mode PWM controller for off-line and DC-to-DC power converters, with current limiting, UVLO, a 5 V reference, and a totem-pole output.

Best for

  • Current-mode control in off-line power supplies
  • DC-to-DC converter control
  • Driving a power MOSFET from a PWM output

Avoid if

  • The design requires more than 50% maximum duty cycle
  • The application needs a surface-mount package
  • The required electrical or compliance data is not verified

Check before use

  • Confirm DIP8 assembly and pin mapping
  • Set RT and CT for the required oscillator frequency
  • Validate current-sense filtering and peak current
  • Check UVLO behavior during startup and brownout

Key specifications

Package
DIP8
UVLO start threshold
8.4 V typical
Post-start operating threshold
7.6 V typical
Maximum duty cycle
50% maximum
Reference voltage
5.0 V typical
Output current
Up to 1 A source/sink

Compliance & Environment

RoHS
-
REACH
-
MSL
-
ECCN
-
HTSUS
-

Application

Off-line power suppliesDC-to-DC convertersIndustrial switching power

Datasheet

9feee1f56fdb40d10016dc0e4ae7154d_UC3843N-TUDI.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for UC3843N-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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Alternative components

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

Design and risk insights

Questions & answers

It is a fixed-frequency current-mode PWM controller in an 8-pin DIP8 package. Internal functions include an oscillator, error amplifier, current-sense comparator, PWM latch, undervoltage lockout, 5 V reference, and a high-current output stage.