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UC2844BD1 - STMicroelectronics

Description: High performance current mode PWM controller

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UC2844BD1 - STMicroelectronics - PCB symbol
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UC2844BD1 - STMicroelectronics PCB footprint - Small Outline Packages - Small Outline Packages - 8 PINS - PLASTIC MICROPACKAGE (SO)
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UC2844BD1 - STMicroelectronics - 3D model - Small Outline Packages - 8 PINS - PLASTIC MICROPACKAGE (SO)
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UC2844BD1 Details

  • Manufacturer Part Number:

    UC2844BD1

  • 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 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:

    85 °C

  • Operating Temperature-Min:

    -25 °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:

    500 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    COMMERCIAL EXTENDED

  • 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

UC2844BD1 Frequently Asked Questions (FAQs)

  • The UC2844BD1 is a high-frequency switching converter, so a good PCB layout is crucial. Keep the power stage components close together, use a solid ground plane, and minimize trace lengths. Use a 4-layer PCB with a dedicated power plane and a separate ground plane. Keep the feedback trace away from the power stage and use a shielded cable for the feedback signal.
  • Choose an inductor with a high saturation current rating, low DC resistance, and a suitable inductance value. The inductance value depends on the output voltage, output current, and switching frequency. A good starting point is to use the inductor value calculation formula provided in the datasheet. Consider using a shielded inductor to reduce EMI.
  • The UC2844BD1 has an operating junction temperature range of -40°C to 150°C. However, the maximum ambient temperature range depends on the specific application and the thermal design. A good thermal design should ensure that the junction temperature stays within the recommended range. Consider using a heat sink or a thermally enhanced package.
  • To ensure stability, follow the compensation network design guidelines in the datasheet. Choose the right compensation components (R1, R2, C1, and C2) based on the output voltage and current. Use a type-III compensation network for most applications. Verify the stability by checking the loop gain and phase margin using a Bode plot or a network analyzer.
  • Use a common-mode choke and a differential-mode filter to reduce EMI. Add a shielded inductor and a shielded transformer (if used) to reduce radiated emissions. Use a metal enclosure and ensure good grounding and shielding of the PCB. Follow the CISPR 22 and EN 55022 standards for EMI compliance.

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UC2844BD1 Overview

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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

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