Part Image

UC3844BD1 - STMicroelectronics

Description: UC3844BD1, PWM Current Mode Controller, 1 A Boost, Flyback, 500 kHz 8-Pin SOIC

Download UC3844BD1 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
UC3844BD1 - STMicroelectronics PCB footprint - Small Outline Packages - Small Outline Packages - SO-8 1.75mm thickness
click to zoom
3D Models
UC3844BD1 - STMicroelectronics  - 3D model - Small Outline Packages - SO-8 1.75mm thickness
click to zoom

UC3844BD1 Details

  • Manufacturer Part Number:

    UC3844BD1

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Package Description:

    SO-8

  • Pin Count:

    8

  • Country Of Origin:

    Morocco

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    7

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    30 V

  • Input Voltage-Min:

    11.5 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    R-PDSO-G8

  • JESD-609 Code:

    e4

  • 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):

    NOT SPECIFIED

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.75 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    SINGLE

  • Switching Frequency-Max:

    500 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

    Nickel/Palladium/Gold (Ni/Pd/Au)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

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

    NOT SPECIFIED

  • Width:

    3.9 mm

UC3844BD1 Frequently Asked Questions (FAQs)

  • The UC3844BD1 can operate up to 500 kHz, but the recommended operating frequency is up to 400 kHz for optimal performance.
  • To ensure stable operation, make sure to decouple the VCC pin with a 10nF to 100nF capacitor, and use a low-ESR capacitor for the output filter. Also, ensure that the layout is designed to minimize noise and electromagnetic interference (EMI).
  • The soft-start pin (SS) is used to slowly ramp up the output voltage during startup, reducing inrush currents and electromagnetic interference (EMI). It can be connected to a capacitor to ground to set the soft-start time.
  • The output voltage of the UC3844BD1 is set by the voltage divider network connected to the feedback pin (FB). The voltage divider should be designed to provide a voltage of 2.5V at the FB pin for a 5V output, and scaled accordingly for other output voltages.
  • The maximum output current of the UC3844BD1 depends on the specific application and the design of the output stage. However, the UC3844BD1 can typically handle output currents up to 5A, and higher currents with proper heat sinking and design.

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

UC3844BD1 Overview

Use the download button to access the UC3844BD1 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

About STMicroelectronics

STMicroelectronics (ST) is a global semiconductor company that designs, manufactures, and markets a broad range of integrated circuits (ICs), discrete devices, and other electronic components. STMicroelectronics offers a diverse portfolio of semiconductor products covering a wide range of applications and industries. Their product categories include microcontrollers, analog and mixed-signal ICs, MEMS (Micro-Electro-Mechanical Systems) sensors, power management ICs, RF (Radio Frequency) transceivers, aut

Parts related to UC3844BD1

Showing 0 results

UC3844BD1 Alternates

Showing results

Image Part Number Model
Part Image IP3844AD-8 TT Electronics Power and Hybrid / Semelab Limited

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8

Part Image E-UC3844BD1 STMicroelectronics

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8

Part Image UC3844D1 Fairchild Semiconductor Corporation

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8

Part Image UC3844BCS Promax-Johnton Electronic Corporation

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8

Part Image IP2844D-8 TT Electronics Resistors

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8

For a full list of alternate parts for UC3844BD1, check out Findchips.com