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- Part Number UC3856DWG4
- Manufacturer Texas Instruments
- Pin Count 16
- Part Category Inductor
- Package Category Small Outline Packages
- Footprint Name Small Outline Packages - DW0016A HEIGHT2.65
- Released Date Apr 21, 2021
- Last Modified Date Mar 7, 2023 4:10 PM UTC
- Pinout / Pin List Click Here (Member Only)
UC3856DWG4 Details
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Manufacturer Part Number:
UC3856DWG4
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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:
GREEN, SOIC-16
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Pin Count:
16
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ECCN Code:
EAR99
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HTS Code:
8542.39.00.60
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Manufacturer:
Texas Instruments
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YTEOL:
0
UC3856DWG4 Frequently Asked Questions (FAQs)
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Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the switching node (pin 3) away from sensitive analog circuits. A good layout practice is to keep the high-frequency components (e.g., the transformer, diodes, and capacitors) close to the IC, and to use a shielded inductor or a toroidal inductor to reduce radiated emissions.
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The transformer should be designed to meet the required output power, voltage, and current. The primary inductance should be chosen based on the minimum operating frequency and the maximum duty cycle. A good starting point is to use a transformer with a primary inductance of 10-20 μH and a turns ratio of 1:1 to 1:2.5. The transformer's leakage inductance should be minimized to reduce EMI.
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The maximum allowed voltage on the VCC pin is 18V. Exceeding this voltage may damage the internal voltage regulator and other components. It's recommended to use a voltage regulator or a zener diode to regulate the input voltage to the UC3856DWG4.
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The UC3856DWG4 has an internal oscillator, but it can be synchronized with an external clock signal through the RT/CT pin. The external clock signal should be a square wave with a frequency between 100 kHz and 500 kHz. The clock pin is sensitive to noise, so it's recommended to use a low-impedance source and to keep the clock signal away from noisy circuits.
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The recommended operating temperature range for the UC3856DWG4 is -40°C to 85°C. Operating the device outside this range may affect its performance, reliability, and lifespan.
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UC3856DWG4 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.