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- Part Number UC3871DW
- Manufacturer Texas Instruments
- Pin Count 18
- Part Category Integrated Circuit
- Package Category Small Outline Packages
- Footprint Name Small Outline Packages - DW (R-PDSO-G18)
- Released Date Jun 17, 2021
- Last Modified Date Mar 7, 2023 4:10 PM UTC
- Pinout / Pin List Click Here (Member Only)
UC3871DW Details
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Manufacturer Part Number:
UC3871DW
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Brand Name:
Texas Instruments
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Rohs Code:
Yes
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Part Life Cycle Code:
Obsolete
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Part Package Code:
SOIC
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Package Description:
SOIC-18
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Pin Count:
18
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ECCN Code:
EAR99
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HTS Code:
8542.39.00.60
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Manufacturer:
Texas Instruments
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YTEOL:
0
UC3871DW Frequently Asked Questions (FAQs)
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The UC3871DW is a high-frequency switching regulator, and proper layout and placement are crucial for its operation. TI recommends a 4-layer PCB with a solid ground plane, and the IC should be placed close to the input capacitors. The switching node (SW pin) should be kept away from sensitive nodes, and the output filter components should be placed close to the output pins. Refer to the TI application note SLUP136 for more details.
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The inductor selection depends on the output current, switching frequency, and output voltage. TI recommends using a shielded inductor with a low DC resistance and high saturation current. The inductor value should be chosen to ensure that the peak-to-peak ripple current is within 20-40% of the output current. Refer to the TI application note SLUP136 for inductor selection guidelines.
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The maximum junction temperature for the UC3871DW is 150°C. However, it's recommended to keep the junction temperature below 125°C for reliable operation and to ensure a long lifespan.
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The UC3871DW is rated for operation up to 85°C ambient temperature. However, it can be used in high-temperature environments with proper derating and thermal management. TI recommends using a heat sink and ensuring good airflow to keep the junction temperature within the recommended limits.
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Oscillations or instability issues can be caused by poor layout, inadequate decoupling, or incorrect component selection. Check the PCB layout for any signs of resonance or noise coupling. Ensure that the input and output capacitors are properly decoupled, and the inductor is properly selected. Also, check the feedback loop compensation and ensure that it's properly designed. Refer to the TI application note SLUP136 for troubleshooting guidelines.
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UC3871DW Overview
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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.