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UC3845BN - STMicroelectronics

Description: UC3845BN, PWM Current Mode Controller, 1 A Boost, Flyback, 500 kHz 8-Pin MiniPDIP

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UC3845BN - STMicroelectronics PCB footprint - Dual-In-Line Packages - Dual-In-Line Packages - Minidip_8
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UC3845BN Details

  • Manufacturer Part Number:

    UC3845BN

  • 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:

    8.2 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    R-PDIP-T8

  • JESD-609 Code:

    e3

  • 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:

    Matte Tin (Sn)

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Pitch:

    2.54 mm

  • Terminal Position:

    DUAL

  • Width:

    7.62 mm

UC3845BN Frequently Asked Questions (FAQs)

  • The UC3845BN 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 output capacitor. Also, ensure that the input voltage is within the recommended range and the device is properly heatsinked.
  • 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 UC3845BN can be adjusted by using a resistive divider network between the output and the feedback pin (FB). The ratio of the resistors determines the output voltage.
  • The maximum output current of the UC3845BN depends on the specific application and the transformer turns ratio. However, the device can deliver up to 1A peak current.

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UC3845BN 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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