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UC3843BNG AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

UC3843BNG product

UC3843BNG

DC DC Switching Controllers

PWM ControllerCurrent Modeonsemi

The UC3843BNG is a fixed-frequency current-mode PWM controller from onsemi, optimized for off-line and DC-DC power supply applications.

Best for

  • Off-line power supplies
  • DC-DC converters

Avoid if

  • Applications requiring very low power consumption during standby

Check before use

  • UVLO thresholds (8.5V/7.6V) to ensure compatibility with your startup circuit

Key specifications

Switching Frequency
500 kHz
Max Duty Cycle
96%
Supply Voltage
8.5 V to 30 V

Compliance & Environment

RoHS
ROHS3 Compliant
REACH
REACH Unaffected
MSL
Not Applicable
ECCN
EAR99
HTSUS
8542.31.0001

Application

Power Supply

Datasheet

Fairchild-Semiconductor-company-11.pdf

800 KB

Datasheet AI

CAD Models

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

EDA Symbol
Schematic symbol for your EDA tool
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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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Where to Buy

Real-time and catalog pricing from verified distributors

Live prices updated on demand · Catalog (~) prices may differ

Alternative components

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

Design and risk insights

Questions & answers

It is a high-performance current-mode controller IC used for regulating power supplies, specifically in flyback or boost topologies.