UC3875DWP

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UC3875DWP

+Nomenclature

IC OFFLINE SW FULL-BRDG 28SOIC

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Spécifications

Attribut Valeur
Package / Case Tube
Part Status Active
Output Isolation Non-Isolated
Topology Full-Bridge
Voltage - Start Up 10.75 V
Voltage - Supply (Vcc/Vdd) 9.5V ~ 20V
Duty Cycle 100%
Frequency - Switching 1MHz
Fault Protection Current Limiting
Control Features Frequency Control, Soft Start, Sync
Operating Temperature 0°C ~ 70°C (TA)
Supplier Device Package 28-SOIC

Présentation

Description

The UC3875DWP is a high-performance, integrated circuit designed for use in power management applications, such as DC-DC converters and power supply systems. It is part of Texas Instruments' line of current-mode PWM controllers. The device is known for its ability to improve the efficiency and performance of power converter designs.
Key features of the UC3875DWP include programmable operating frequency, current-mode control for superior transient response, and a wide range of input voltage capabilities. It includes features such as soft-start, overcurrent protection, and under-voltage lockout to enhance system reliability and protect against fault conditions. The chip is encapsulated in a SOIC (Small Outline Integrated Circuit) package, which makes it suitable for compact designs.
The UC3875DWP is commonly used in applications requiring precise control of output voltage, such as telecommunications, computer systems, and industrial equipment. Its design facilitates ease of use in complex systems, allowing engineers to tailor power supply characteristics to specific needs.

Equivalent

The UC3875DWP is a current-mode PWM controller designed for high-frequency power supply applications. Equivalent products include:
1. UCC3808 series (e.g., UCC3808D) from Texas Instruments.
2. LT1248 from Analog Devices.
3. NCP1200 series from ON Semiconductor.
4. FAN7554 from Fairchild Semiconductor (now part of ON Semiconductor).
Ensure compatibility with specific design requirements when selecting an alternative.

Features

The UC3875DWP is a high-performance current-mode PWM controller designed for a variety of applications, including offline and DC-to-DC converters. Key features of the UC3875DWP include:
1. Current-Mode Control: Offers enhanced transient response and simple feedback loop design.
2. Programmable Oscillator Frequency: Allows flexibility in setting the desired switching frequency.
3. Synchronization Capability: Multiple controllers can be synchronized for parallel operation.
4. Soft-Start Function: Gradually ramps up the output voltage, reducing stress on components at startup.
5. Built-in Protection Features: Includes undervoltage lockout, overcurrent protection, and thermal shutdown to enhance system reliability.
6. High-Voltage Operation: Capable of operating at high voltages suitable for power supply applications.
7. Low Start-Up Current: Minimizes power consumption during startup.
8. Wide Temperature Range: Designed to operate efficiently in varying environmental conditions.
Overall, the UC3875DWP is ideal for applications requiring efficient and reliable power management solutions.

Pinout

The UC3875DWP is a high-performance, pulse-width modulation (PWM) controller. It typically comes in a 20-pin package. The primary function of this device is to regulate the power supply by controlling the duty cycle of the PWM signal, which is crucial for efficient power conversion in applications like power supply units and motor controllers.
Key functions and features include:
1. PWM Control: Provides precise control of the power output through adjustable duty cycles.
2. Soft Start: Prevents inrush current during start-up by gradually increasing the duty cycle.
3. Synchronization Capability: Allows synchronization with an external clock.
4. Protection Features: Includes undervoltage lockout and overcurrent protection to enhance reliability and safety.
5. Oscillator: An internal oscillator that sets the switching frequency of the PWM.
Overall, the UC3875DWP is designed for high-efficiency power management in various electronic devices.

Manufacturer

The UC3875DWP is manufactured by Texas Instruments (TI). Texas Instruments is a global semiconductor company that designs and manufactures a wide range of electronic products, primarily focusing on analog and embedded processing. The company serves various industries, including automotive, industrial, personal electronics, communications equipment, and enterprise systems. TI is known for its innovation in developing products like microcontrollers, processors, sensors, and power management devices.

Application

The UC3875DWP is a Texas Instruments analog controller primarily used in power management applications. Its main application areas include switch-mode power supplies (SMPS), DC-DC converters, and uninterruptible power supplies (UPS). It is specifically designed for high-performance power conversion systems, offering features like voltage-mode control, adjustable frequency, and soft-start capabilities. The device is suitable for industrial, telecommunications, and computing environments where efficient power conversion and regulation are critical. Its robust design and precision control make it ideal for applications requiring high reliability and efficiency.

Package

The UC3875DWP is a high-performance phase-shift PWM controller IC housed in a surface-mount 20-pin SOIC (Small Outline Integrated Circuit) package. This package type, identified by the "DWP" suffix, ensures efficient thermal management and compactness suitable for space-constrained applications, including power supply systems.

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