Texas Instruments
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UC3872M
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UC3872M

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High-performance power factor correction controller
  • Package: 16-pin SOIC (Small Outline Integrated Circuit)
  • Essence: Efficiently converts AC input voltage to a regulated DC output voltage
  • Packaging/Quantity: Available in reels of 2500 units

Specifications

  • Input Voltage Range: 85VAC to 265VAC
  • Output Voltage Range: 380VDC to 400VDC
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Duty Cycle: 50%
  • Frequency Range: 50Hz to 60Hz
  • Maximum Output Power: 300W

Detailed Pin Configuration

  1. VCC: Power supply voltage input
  2. FB: Feedback pin for regulating the output voltage
  3. COMP: Compensation pin for stability control
  4. CS: Current sense pin for current feedback
  5. INV: Inverting input for error amplifier
  6. VREF: Reference voltage output
  7. RT: Timing resistor connection pin
  8. CT: Timing capacitor connection pin
  9. GND: Ground reference
  10. OSC: Oscillator timing capacitor connection pin
  11. SS: Soft-start capacitor connection pin
  12. SD: Shutdown pin for enabling/disabling the device
  13. OUT: Output voltage pin
  14. NC: No connection
  15. NC: No connection
  16. NC: No connection

Functional Features

  • High power factor correction capability
  • Wide input voltage range for universal compatibility
  • Precise regulation of output voltage
  • Overvoltage and overcurrent protection
  • Soft-start function for smooth startup
  • Shutdown pin for power management

Advantages and Disadvantages

Advantages

  • High efficiency power conversion
  • Improved power factor for reduced energy consumption
  • Compact and easy-to-use package
  • Robust protection features

Disadvantages

  • Limited maximum output power
  • Requires external timing components
  • Not suitable for low-power applications

Working Principles

The UC3872M is a high-performance power factor correction controller that operates by regulating the input current waveform to achieve a near-unity power factor. It utilizes an error amplifier, oscillator, and control logic to adjust the duty cycle of the internal power switch. By maintaining a constant output voltage, it ensures efficient conversion of AC input voltage to a regulated DC output voltage.

Detailed Application Field Plans

The UC3872M is commonly used in various power management applications, including:

  1. Switching Power Supplies
  2. LED Lighting Systems
  3. Motor Drives
  4. Industrial Equipment
  5. Renewable Energy Systems

Detailed and Complete Alternative Models

  1. UC3852M: Similar functionality with minor differences in specifications
  2. UC3875M: Higher maximum output power capability
  3. UC3886M: Enhanced protection features with wider temperature range

These alternative models provide similar functionality to the UC3872M but may offer additional features or improved performance depending on specific application requirements.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací UC3872M v technických řešeních

Sure! Here are 10 common questions and answers related to the application of UC3872M in technical solutions:

  1. Q: What is UC3872M? A: UC3872M is a high-performance power factor correction (PFC) controller IC.

  2. Q: What is the purpose of UC3872M? A: The purpose of UC3872M is to improve power factor and reduce harmonic distortion in AC-DC power supplies.

  3. Q: How does UC3872M achieve power factor correction? A: UC3872M uses a boost converter topology along with control algorithms to shape the input current waveform and align it with the input voltage waveform, thus achieving power factor correction.

  4. Q: What is the input voltage range supported by UC3872M? A: UC3872M supports an input voltage range of typically 85VAC to 265VAC.

  5. Q: Can UC3872M be used in both single-phase and three-phase systems? A: Yes, UC3872M can be used in both single-phase and three-phase systems.

  6. Q: What is the maximum output power that UC3872M can handle? A: UC3872M can handle output powers up to several kilowatts, depending on the specific design and external components used.

  7. Q: Does UC3872M have any built-in protection features? A: Yes, UC3872M has built-in protection features such as overvoltage protection, overcurrent protection, and thermal shutdown.

  8. Q: Can UC3872M operate in continuous or discontinuous conduction mode? A: UC3872M can operate in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), depending on the design requirements.

  9. Q: What are the typical applications of UC3872M? A: UC3872M is commonly used in applications such as AC-DC power supplies, LED drivers, motor drives, and renewable energy systems.

  10. Q: Are there any evaluation boards or reference designs available for UC3872M? A: Yes, several manufacturers offer evaluation boards and reference designs for UC3872M, which can help in the development and testing of power factor correction solutions.

Please note that these answers are general and may vary depending on the specific implementation and requirements of the application.