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UC2876NG4
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UC2876NG4

Basic Information Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Efficiency, Low Power Dissipation
  • Package: DIP-16 (Dual In-Line Package with 16 pins)
  • Essence: Voltage Mode PWM Controller
  • Packaging/Quantity: Tray/1000 units per tray

Specifications

  • Input Voltage Range: 8V to 40V
  • Output Voltage Range: 1.23V to 37V
  • Maximum Duty Cycle: 100%
  • Switching Frequency: 50kHz to 500kHz
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

  1. VCC: Power Supply Input
  2. COMP: Error Amplifier Output
  3. FB: Feedback Input
  4. RT/CT: Timing Components Connection
  5. CT: Timing Capacitor Connection
  6. RT: Timing Resistor Connection
  7. GND: Ground
  8. SYNC: Synchronization Input
  9. SS/TR: Soft-Start/Tracking Control
  10. CS: Current Sense Input
  11. INV: Inverting Input of Error Amplifier
  12. NC: No Connection
  13. DRVH: High-Side Gate Driver Output
  14. DRVL: Low-Side Gate Driver Output
  15. VREF: Reference Voltage Output
  16. VSENSE: Voltage Sensing Input

Functional Features

  • Voltage Mode PWM Control
  • Adjustable Output Voltage
  • Overcurrent Protection
  • Soft-Start Functionality
  • Synchronization Capability
  • Error Amplifier for Precise Regulation
  • High Efficiency Operation
  • Low Power Dissipation

Advantages and Disadvantages

Advantages

  • Wide Input Voltage Range
  • High Efficiency Operation
  • Adjustable Output Voltage
  • Overcurrent Protection
  • Soft-Start Functionality

Disadvantages

  • Limited Operating Temperature Range (-40°C to +85°C)
  • Requires External Timing Components (RT/CT)

Working Principles

The UC2876NG4 is a voltage mode PWM controller that regulates the output voltage by adjusting the duty cycle of the switching transistor. It uses an error amplifier to compare the feedback voltage with a reference voltage and generates an error signal. This error signal is then processed by the control circuitry to adjust the duty cycle and maintain the desired output voltage. The soft-start function gradually increases the duty cycle during startup to prevent excessive inrush current.

Detailed Application Field Plans

The UC2876NG4 is commonly used in various power management applications, including: - Switching Power Supplies - DC-DC Converters - LED Drivers - Battery Chargers - Industrial Control Systems

Detailed and Complete Alternative Models

  1. UC3842: Voltage Mode PWM Controller, DIP-8 package
  2. UC3843: Voltage Mode PWM Controller, SOIC-8 package
  3. UC3844: Voltage Mode PWM Controller, DIP-8 package
  4. UC3845: Voltage Mode PWM Controller, SOIC-8 package
  5. UC2854: Current Mode PWM Controller, DIP-16 package

Note: These alternative models offer similar functionality but may have different specifications and pin configurations.

This entry provides an overview of the UC2876NG4, a voltage mode PWM controller used in power management applications. It includes basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Listen Sie 10 häufige Fragen und Antworten im Zusammenhang mit der Anwendung von UC2876NG4 in technischen Lösungen auf

Sure! Here are 10 common questions and answers related to the application of UC2876NG4 in technical solutions:

  1. Q: What is UC2876NG4? A: UC2876NG4 is a high-performance synchronous rectifier controller IC used in power supply applications.

  2. Q: What are the key features of UC2876NG4? A: Some key features include high efficiency, low standby power consumption, adjustable dead-time control, and protection features like overvoltage and overcurrent protection.

  3. Q: What is the typical input voltage range for UC2876NG4? A: The typical input voltage range is between 4.5V and 75V.

  4. Q: Can UC2876NG4 be used in both buck and boost converter topologies? A: Yes, UC2876NG4 can be used in both buck and boost converter topologies.

  5. Q: What is the maximum switching frequency supported by UC2876NG4? A: The maximum switching frequency supported is typically up to 1MHz.

  6. Q: Does UC2876NG4 have built-in protection features? A: Yes, UC2876NG4 has built-in protection features such as overvoltage protection, overcurrent protection, and thermal shutdown.

  7. Q: Can UC2876NG4 operate in a wide temperature range? A: Yes, UC2876NG4 can operate in a wide temperature range, typically from -40°C to 125°C.

  8. Q: Is UC2876NG4 suitable for high-power applications? A: Yes, UC2876NG4 is suitable for high-power applications due to its high efficiency and robust design.

  9. Q: Does UC2876NG4 require an external MOSFET for operation? A: Yes, UC2876NG4 requires an external N-channel MOSFET for synchronous rectification.

  10. Q: Are there any evaluation boards or reference designs available for UC2876NG4? A: Yes, Texas Instruments provides evaluation boards and reference designs to help users get started with UC2876NG4 in their applications.

Please note that the answers provided here are general and may vary depending on specific application requirements. It is always recommended to refer to the datasheet and application notes for detailed information.