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UC3845B AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

UC3845B product

UC3845B

AC DC Converters

PWM ControllerCurrent ModeSOP-8

The UC3845B is a fixed-frequency, current-mode PWM controller optimized for off-line and DC-to-DC power supply designs.

Best for

  • Flyback converters
  • Off-line power supplies

Avoid if

  • Applications requiring >50% duty cycle

Check before use

  • Thermal dissipation and MOSFET gate drive requirements

Key specifications

Max Duty Cycle
50%
UVLO (On)
8.4 V
Frequency
500 kHz

Compliance & Environment

RoHS
ROHS3 Compliant
REACH
-
MSL
1 (Unlimited)
ECCN
EAR99
HTSUS
8542.39.0001

Application

Power SuppliesDC-DC Converters

Datasheet

b265b8daee4a601657bafbefc8d30c45.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for UC3845B: 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
Verified KiCad 8 symbol, footprint, and 3D model
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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 current-mode PWM controller designed for driving power MOSFETs in switching power supplies.