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UC3844BD1 AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

UC3844BD1 product

UC3844BD1

DC DC Switching Controllers

current-mode PWMSO-850% duty cycleUVLOMOSFET driver

UC3844BD1 is an 8-pin current-mode PWM controller for fixed-frequency switching supplies where a maximum 50% duty cycle is required.

Best for

  • Fixed-frequency current-mode power converters
  • Designs needing a maximum 50% duty cycle
  • N-channel MOSFET drive

Avoid if

  • The control supply cannot reach the UVLO start threshold
  • A duty cycle above 50% is required

Check before use

  • RT/CT oscillator setting
  • VCC start-up and auxiliary bias supply
  • Current-sense filtering and peak-current limit
  • Loop compensation

Key specifications

Package
SO-8, 8-pin
Maximum duty cycle
50% max
UVLO thresholds
16 V typ start, 10 V typ turn-off
Reference output
5 V, 50 mA

Compliance & Environment

RoHS
RoHS non-compliant

Application

Switch-mode power suppliesDC-DC convertersOffline power converters

Datasheet

ON-Semiconductor-company-79.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for UC3844BD1: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

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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

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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

UC3844BD1 is an ST current-mode PWM controller in an SO-8 package. It includes an oscillator, error amplifier, 5 V reference, current-sense comparator, UVLO, and MOSFET gate-drive output.