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UC3845-TD AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

UC3845-TD product

UC3845-TD

Component

UC3845PWM controllercurrent modeDC/DC converterisolated converterUVLO

UC3845-TD is an 8-pin current-mode PWM controller intended for isolated and DC/DC power converters. The supplied datasheet specifies low startup current, current limiting, UVLO, a 5 V reference, and operation up to 500 kHz.

Best for

  • Fixed-frequency isolated power converters
  • DC/DC converter control
  • Peak-current-mode PWM designs

Avoid if

  • A duty cycle above 50% is required
  • Compliance or lifecycle status must be documented before release
  • The package variant cannot be confirmed

Check before use

  • VCC startup and turn-off thresholds
  • Current-sense resistor and noise filter
  • RT/CT oscillator setting
  • Exact package and footprint

Key specifications

Control method
Current-mode PWM
Oscillator frequency
100 kHz to 500 kHz
Reference output
5.00 V typical
UVLO start threshold
8.4 V typical
Maximum duty cycle
48% typical, 50% maximum

Compliance & Environment

RoHS
-
REACH
-
MSL
-
ECCN
-
HTSUS
-

Application

Power convertersIsolated convertersDC/DC converters

Datasheet

e39cb1a795b182fa78c78ea7cd929602_UC3845-TD.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for UC3845-TD: 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

UC3845-TD is a current-mode PWM controller for power-conversion designs. Its functional blocks include a 5 V reference, error amplifier, oscillator, current-sense comparator, PWM latch, UVLO circuit, and totem-pole output stage.