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- Stock & Prices $ Price & Stock for UC2861DW
- Part Number UC2861DW
- Manufacturer Texas Instruments
- Pin Count 16
- Last Modified Date Apr 28, 2022 1:17 PM UTC
- Pinout / Pin List Click Here (Member Only)
UC2861DW Details
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Manufacturer Part Number:
UC2861DW
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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:
Not Recommended
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Part Package Code:
SOIC
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Package Description:
SOIC-16
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Pin Count:
16
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ECCN Code:
EAR99
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HTS Code:
8542.39.00.90
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Manufacturer:
Texas Instruments
UC2861DW Frequently Asked Questions (FAQs)
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The UC2861DW 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 output inductor and diode should be placed close to the IC, and the output capacitors should be placed close to the load. A good rule of thumb is to keep the high-current paths short and wide, and to minimize the loop area of the switching node.
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The inductor selection depends on the output current, output voltage, and switching frequency. TI recommends using an inductor with a low DC resistance (DCR) and a high saturation current. The inductor value should be chosen to achieve the desired output ripple voltage. A good starting point is to use an inductor with a value between 1-10 μH, and then adjust based on the specific application requirements.
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The UC2861DW has an absolute maximum input voltage rating of 18V. However, the recommended operating input voltage range is 7-15V. Exceeding the maximum input voltage can cause damage to the IC or affect its reliability.
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The UC2861DW requires a compensation network to ensure stability. TI recommends using a Type II compensation network, which consists of a resistor, capacitor, and resistor (R-C-R) connected between the COMP pin and the output voltage. The values of the compensation components depend on the output voltage, output current, and switching frequency. TI provides a compensation calculator tool to help designers determine the correct values.
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The bootstrap capacitor (CBOOT) is used to generate the gate drive voltage for the internal high-side FET. The capacitor is charged from the input voltage through the bootstrap diode (DBOOT) during the off-time of the high-side FET. The recommended value of CBOOT is 10-100 nF, and it should be placed close to the IC.
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UC2861DW 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.
