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- Part Number UC3876N
- Manufacturer Texas Instruments
- Pin Count 20
- Part Category Integrated Circuit
- Package Category Dual-In-Line Packages
- Footprint Name Dual-In-Line Packages - N (R-PDIP-T20)
- Released Date May 11, 2021
- Last Modified Date Mar 7, 2023 4:10 PM UTC
- Pinout / Pin List Click Here (Member Only)
UC3876N Details
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Manufacturer Part Number:
UC3876N
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Brand Name:
Texas Instruments
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Pbfree Code:
Yes
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Rohs Code:
Yes
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Part Life Cycle Code:
Active
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Part Package Code:
DIP
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Pin Count:
20
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Country Of Origin:
Malaysia
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ECCN Code:
EAR99
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HTS Code:
8542.39.00.90
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Manufacturer:
Texas Instruments
UC3876N Frequently Asked Questions (FAQs)
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The UC3876N 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 (pin 11) should be kept away from sensitive nodes, and the output filter components should be placed close to the output pins.
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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 inductor current is within the recommended range (typically 1.5 to 2 times the output current).
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The UC3876N has an absolute maximum input voltage rating of 30V, but the recommended maximum input voltage is 24V. Exceeding the recommended input voltage can reduce the IC's reliability and lifespan.
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The UC3876N requires a compensation network to ensure stability. TI recommends using a Type II compensation network, which consists of a resistor, capacitor, and optional zero-pin. The compensation values depend on the output voltage, output current, and switching frequency, and can be calculated using TI's compensation calculator or by following the application note.
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Yes, the UC3876N can be used in a synchronous rectification configuration, which can improve efficiency at high output currents. However, this requires additional components, such as a synchronous rectifier FET and a Schottky diode, and careful layout and design to ensure proper operation.
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UC3876N 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.