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UC3842D - Texas Instruments

Description: CURRENT MODE PWM CONTROLLER

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UC3842D - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - D(R-DPSO-G14-)
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UC3842D - Texas Instruments  - 3D model - Small Outline Packages - D(R-DPSO-G14-)
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UC3842D Details

  • Manufacturer Part Number:

    UC3842D

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Pin Count:

    14

  • Country Of Origin:

    Mexico

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    28 V

  • Input Voltage-Min:

    11.5 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    R-PDSO-G14

  • JESD-609 Code:

    e4

  • Length:

    8.65 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    14

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    1 A

  • Output Voltage-Nom:

    2.5 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP14,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.75 mm

  • Supply Current-Max (Isup):

    25 mA

  • Supply Voltage-Max (Vsup):

    28 V

  • Supply Voltage-Min (Vsup):

    16 V

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK-BOOST

  • 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):

    30

  • Width:

    3.9 mm

UC3842D Frequently Asked Questions (FAQs)

  • The maximum voltage rating of the UC3842D is 30V, but it's recommended to operate it at a maximum voltage of 25V to ensure reliable operation.
  • The frequency of the oscillator in the UC3842D can be calculated using the formula: f = 1.12 / (R1 * C1), where R1 is the resistance between pins 6 and 7, and C1 is the capacitance between pins 6 and 7.
  • The soft-start pin (pin 9) in the UC3842D is used to slowly ramp up the output voltage during startup, reducing inrush currents and preventing voltage overshoots.
  • The maximum duty cycle of the UC3842D can be set by connecting a resistor (Rt) between pins 1 and 2. The maximum duty cycle is calculated as: Dmax = (Rt / (Rt + R1)) * 100%, where R1 is the resistance between pins 1 and 2.
  • The undervoltage lockout (UVLO) in the UC3842D is a feature that prevents the device from operating when the input voltage is below a certain threshold (typically 8.5V). This ensures that the device operates reliably and prevents damage to the device or the load.

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About Texas Instruments

Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.

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