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UC3843BN - STMicroelectronics

Description: UC3843BN, PWM Current Mode Controller, 1 A Boost, Flyback, 500 kHz 8-Pin PDIP

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UC3843BN - STMicroelectronics - PCB symbol
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UC3843BN - STMicroelectronics PCB footprint - Dual-In-Line Packages - Dual-In-Line Packages - 8 PINS - PLASTIC DIP
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UC3843BN - STMicroelectronics - 3D model - Dual-In-Line Packages - 8 PINS - PLASTIC DIP
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UC3843BN Details

  • Manufacturer Part Number:

    UC3843BN

  • 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:

    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

UC3843BN Frequently Asked Questions (FAQs)

  • The maximum operating frequency of UC3843BN is 500 kHz. However, it's recommended to operate it at a frequency between 100 kHz to 400 kHz for optimal performance.
  • The values of RT and CT depend on the desired oscillator frequency and the specific application. A good starting point is to use the values recommended in the datasheet (RT = 10 kΩ, CT = 3.3 nF) and then adjust them based on the actual circuit performance.
  • The soft-start pin (SS) is used to gradually increase the output voltage during startup, reducing inrush currents and electromagnetic interference (EMI). Connect a capacitor (typically 10 nF to 100 nF) from the SS pin to ground and a resistor (typically 1 kΩ to 10 kΩ) from the SS pin to the output voltage.
  • To ensure stability, follow the layout guidelines in the datasheet, use a low-ESR output capacitor, and add a small capacitor (typically 10 nF to 100 nF) between the output and ground. Also, ensure that the input voltage is well-regulated and the output voltage is properly filtered.
  • The UC3843BN is designed to handle output currents up to 1.5 A. However, the actual output current capability depends on the specific application, PCB layout, and thermal management.

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UC3843BN Overview

Use the download button to access the UC3843BN 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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UC3843BN Alternates

Showing results

Image Part Number Model
Part Image UC3843J Rochester Electronics LLC

1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CDIP8
Part Image UC3843N Rochester Electronics LLC

1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP8, GREEN, PLASTIC, DIP-8
Part Image UC3843BNG Rochester Electronics LLC

1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDIP8, HALOGEN AND LEAD FREE, PLASTIC, DIP-8
Part Image UC3843N Fairchild Semiconductor Corporation

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP8
Part Image UC3843N STMicroelectronics

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP8
For a full list of alternate parts for UC3843BN, check out Findchips.com