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UC3844BN - STMicroelectronics

Description: UC3844BN, PWM Current Mode Controller, 1 A Boost, Flyback, 500 kHz 8-Pin PDIP

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UC3844BN Details

  • Manufacturer Part Number:

    UC3844BN

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    DIP

  • Package Description:

    MINI, DIP-8

  • Pin Count:

    8

  • Country Of Origin:

    Mainland China

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Factory Lead Time:

    14 Weeks

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    6

  • 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-PDIP-T8

  • JESD-609 Code:

    e4

  • 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:

    DIP

  • Package Equivalence Code:

    DIP8,.3

  • Package Shape:

    RECTANGULAR

  • Package Style:

    IN-LINE

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    5.08 mm

  • Surface Mount:

    NO

  • Switcher Configuration:

    SINGLE

  • Switching Frequency-Max:

    500 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

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

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Pitch:

    2.54 mm

  • Terminal Position:

    DUAL

  • Width:

    7.62 mm

UC3844BN Frequently Asked Questions (FAQs)

  • The maximum operating frequency of UC3844BN is 500 kHz. However, it's recommended to operate it at a frequency between 100 kHz to 400 kHz for optimal performance.
  • The minimum input voltage is typically 8.5V, and the maximum input voltage is 35V. However, it's recommended to operate it within 12V to 25V for optimal performance. You can calculate the minimum and maximum input voltage based on your specific application requirements.
  • The soft-start pin (SS) is used to control the output voltage ramp-up time during startup. It helps to reduce the inrush current and prevents voltage overshoots. You can connect a capacitor between the SS pin and ground to set the soft-start time.
  • The values of Rt and Ct determine the oscillator frequency. A higher Rt value increases the frequency, while a higher Ct value decreases the frequency. A good starting point is Rt = 10 kΩ and Ct = 3.3 nF. You can adjust these values based on your specific application requirements.
  • The undervoltage lockout (UVLO) is a protection feature that prevents the IC from operating below a certain input voltage threshold (typically 8.5V). This helps to prevent damage to the IC and ensures reliable operation.

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UC3844BN Overview

Use the download button to access the UC3844BN 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

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