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- Part Number UC2845DTR
- Manufacturer Texas Instruments
- Pin Count 14
- Part Category Integrated Circuit
- Package Category Small Outline Packages
- Footprint Name Small Outline Packages - D
- Released Date Dec 22, 2021
- Last Modified Date Mar 7, 2023 4:10 PM UTC
- Pinout / Pin List Click Here (Member Only)
UC2845DTR Details
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Manufacturer Part Number:
UC2845DTR
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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:
SOIC
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Pin Count:
14
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Country Of Origin:
Mexico
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ECCN Code:
EAR99
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HTS Code:
8542.39.00.90
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Manufacturer:
Texas Instruments
UC2845DTR Frequently Asked Questions (FAQs)
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The UC2845DTR is a high-frequency switching converter, and proper PCB layout is crucial for its operation. TI recommends a 4-layer PCB with a solid ground plane, and the use of vias to connect the top and bottom layers. The input and output capacitors should be placed close to the IC, and the feedback network should be routed away from the switching node. A good layout will help reduce EMI and improve the converter's efficiency and reliability.
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The transformer selection depends on the input voltage, output voltage, and power rating of your design. TI recommends using a transformer with a turns ratio that matches the input and output voltage requirements. The transformer's core material, size, and winding configuration also affect its performance. TI provides a transformer design guide and a list of recommended transformers in the UC2845DTR datasheet and application notes.
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The maximum duty cycle of the UC2845DTR is typically around 50%, but it can be adjusted by changing the value of the RT resistor. However, increasing the duty cycle beyond 50% can lead to instability, reduced efficiency, and increased heat dissipation. It's essential to ensure that the duty cycle is set correctly to maintain a stable output voltage and prevent overheating.
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The UC2845DTR's voltage feedback loop requires compensation to ensure stability and prevent oscillations. TI recommends using a type-II compensator network, which consists of resistors and capacitors. The compensation network should be designed to provide a stable gain and phase margin across the entire operating frequency range. TI provides a compensation design guide and a calculator tool to help engineers design a stable feedback loop.
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The UC2845DTR is a high-power device that can generate significant heat during operation. TI recommends using a heat sink with a thermal resistance of less than 10°C/W to keep the junction temperature below 125°C. The PCB layout should also be designed to provide good thermal conduction and airflow. Additionally, engineers should ensure that the device is operated within its recommended operating conditions and that the input voltage and current are within the specified limits.
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UC2845DTR 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.