Part Image

UC3845BD1G - onsemi

Description: High Current Totem Pole Output; Current Mode Operation to 500 kHz Output Switching Frequency; Latching PWM for Cycle-By-Cycle Current Limiting; Automatic Feed Forward Compensation; Internally Trimmed Reference with Undervoltage Lockout; Undervoltage Lockout with Hysteresis; Oscillator Frequency Guaranteed at 250 kHz; Low Startup and Operating Current; Trimmed Oscillator for Precise Frequency Control; Output Deadtime Adjustable from 50% to 70%; Pb-Free Packages are Available

Download UC3845BD1G Model
Schematic
symbols
Schematic symbol is unavailable for download
PCB
footprints
PCB footprint is unavailable for download
3D
models
3D model is unavailable for download
PCB Footprints
UC3845BD1G - onsemi PCB footprint - Small Outline Packages - Small Outline Packages - SOIC−8 NB CASE 751−07 ISSUE AK---
click to zoom
3D Models
UC3845BD1G - onsemi  - 3D model - Small Outline Packages - SOIC−8 NB CASE 751−07 ISSUE AK---
click to zoom

UC3845BD1G Details

  • Manufacturer Part Number:

    UC3845BD1G

  • Brand Name:

    onsemi

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC-8 Narrow Body

  • Pin Count:

    8

  • Manufacturer Package Code:

    751-07

  • Country Of Origin:

    Mainland China

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    onsemi

  • YTEOL:

    0

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    25 V

  • Input Voltage-Min:

    12 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    R-PDSO-G8

  • JESD-609 Code:

    e3

  • Length:

    4.9 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    1 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP8,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.75 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    SINGLE

  • Switching Frequency-Max:

    275 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

    Matte Tin (Sn) - annealed

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

  • Time@Peak Reflow Temperature-Max (s):

    30

  • Width:

    3.9 mm

UC3845BD1G Frequently Asked Questions (FAQs)

  • The maximum operating frequency of the UC3845BD1G is 500 kHz.
  • Yes, the UC3845BD1G can be used for both isolated and non-isolated converters, including flyback, forward, and boost converters.
  • The output voltage of the UC3845BD1G is set by the feedback voltage divider network connected to the FB pin, which regulates the output voltage to the desired level.
  • The soft-start pin (SS) is used to gradually ramp up the output voltage during startup, reducing inrush currents and preventing output voltage overshoot.
  • Yes, the UC3845BD1G can be used for high-power applications, but it requires proper thermal management and heat sinking to ensure reliable operation.

Trust Checks

This model has been built in collaboration with the manufacturer.
Manufacturer Collaborated
This model has been verified by system checks.
System Verified
This model has been reviewed by community users.
Community Approved
Sponsored

UC3845BD1G Overview

Use the download button to access the UC3845BD1G schematic symbol, PCB footprint, and 3D model.
To find more CAD model downloads similar to this part, try a partial part number search, like UC384, or try a keyword search, such as Switching Regulator or Controllers

Parts related to UC3845BD1G

Showing 0 results

UC3845BD1G Alternates

Showing results

Image Part Number Model
Part Image UC2845BD1G onsemi

Switching Controller, Current-mode, 1A, 275kHz Switching Freq-Max, BIPolar, PDSO8

Part Image UC2845BD1R2 onsemi

Switching Controller, Current-mode, 1A, 275kHz Switching Freq-Max, BIPolar, PDSO8

Part Image UC3845BD1R2 onsemi

Switching Controller, Current-mode, 1A, 275kHz Switching Freq-Max, BIPolar, PDSO8

Part Image UC3845BVD1 onsemi

Switching Controller, Current-mode, 1A, 275kHz Switching Freq-Max, BIPolar, PDSO8

Part Image UC2845BD1 onsemi

Switching Controller, Current-mode, 1A, 275kHz Switching Freq-Max, BIPolar, PDSO8

For a full list of alternate parts for UC3845BD1G, check out Findchips.com