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UC3843-JSM AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

UC3843-JSM product

UC3843-JSM

Component

UC3843current-mode PWMSMPS controller8-pin controllertotem-pole output

UC3843-JSM is an 8-pin current-mode PWM controller for switch-mode power-supply control, with oscillator timing, current-limit sensing, UVLO, a 5 V reference, and a totem-pole output stage.

Best for

  • Current-mode switch-mode power-supply controllers
  • Offline or DC power-conversion control circuits requiring an external timing network

Avoid if

  • A confirmed package variant is required but cannot be verified
  • A design requires stated automotive, RoHS, REACH, or lifecycle documentation

Check before use

  • Confirm SOP-8 versus DIP-8 for the purchased item
  • Set RT/CT for the required switching frequency
  • Keep the current-sense input within the stated range
  • Check output-drive current and switching losses with the selected power switch

Key specifications

Control architecture
Current-mode PWM
Maximum supply voltage
30 V
Reference output
5.00 V typical
Maximum duty cycle
96% typical
UVLO start threshold
8.4 V typical

Compliance & Environment

RoHS
-
REACH
-
MSL
-
ECCN
-
HTSUS
-

Application

Switch-mode power suppliesPower conversion control

Datasheet

294fbf695581cebca1b6bca31c626d2e_UC3843-JSM.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for UC3843-JSM: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol
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PCB Footprint
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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

UC3843-JSM is a current-mode PWM control IC for switch-mode power supplies. The datasheet shows an error amplifier, current-sense comparator, oscillator, PWM latch, 5 V reference, undervoltage lockout, and totem-pole output driver.