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UC2872NG4
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UC2872NG4

Basic Information Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Efficiency, Low Power Consumption
  • Package: DIP-16 (Dual In-Line Package with 16 pins)
  • Essence: Voltage Mode PWM Controller
  • Packaging/Quantity: Tube/50 pieces per tube

Specifications

  • Input Voltage Range: 10V to 30V
  • Output Voltage Range: 0.8V to 5.5V
  • Maximum Output Current: 3A
  • Switching Frequency: 100kHz to 1MHz
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

  1. VCC: Power Supply Input
  2. GND: Ground
  3. COMP: Compensation Pin for Feedback Loop
  4. CS: Current Sense Input
  5. RT/CT: Timing Components Connection
  6. SS/TR: Soft-Start/Shutdown Control
  7. FB: Feedback Voltage Input
  8. INV: Inverting Input of Error Amplifier
  9. EAOUT: Error Amplifier Output
  10. ISENSE: Current Sense Output
  11. SYNC: Synchronization Input
  12. OSC: Oscillator Timing Components Connection
  13. DRVH: High-Side Gate Driver Output
  14. DRVL: Low-Side Gate Driver Output
  15. VREF: Reference Voltage Output
  16. UVLO: Under-Voltage Lockout Input

Functional Features

  • Voltage Mode PWM Control
  • Adjustable Output Voltage and Current Limit
  • Soft-Start and Shutdown Control
  • Synchronization Capability
  • Error Amplifier with External Compensation
  • Under-Voltage Lockout Protection

Advantages

  • High Efficiency Power Conversion
  • Wide Input Voltage Range
  • Flexible Output Voltage Adjustment
  • Robust Protection Features
  • Compact DIP-16 Package for Easy Integration

Disadvantages

  • Limited Maximum Output Current (3A)
  • Requires External Compensation Components
  • Not Suitable for High-Frequency Applications

Working Principles

The UC2872NG4 is a voltage mode PWM controller designed for power management applications. It operates by comparing the feedback voltage with a reference voltage to generate an error signal. This error signal is then amplified and used to control the duty cycle of the power switch, regulating the output voltage. The controller also includes various protection features such as under-voltage lockout and current limiting.

Detailed Application Field Plans

The UC2872NG4 is commonly used in various power management applications, including: - DC-DC Converters - Switching Power Supplies - LED Drivers - Battery Chargers - Industrial Control Systems

Detailed and Complete Alternative Models

  1. UC3842: Similar voltage mode PWM controller with higher maximum output current (5A).
  2. UC2842: Voltage mode PWM controller with lower maximum output current (1A).
  3. UC3872: Voltage mode PWM controller with additional features for power factor correction.

Note: These alternative models may have different pin configurations and specifications. Please refer to their respective datasheets for detailed information.

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10 domande e risposte comuni relative all'applicazione di UC2872NG4 nelle soluzioni tecniche

Sure! Here are 10 common questions and answers related to the application of UC2872NG4 in technical solutions:

  1. Q: What is UC2872NG4? A: UC2872NG4 is a specific model of integrated circuit (IC) used for power management applications.

  2. Q: What are the typical applications of UC2872NG4? A: UC2872NG4 is commonly used in various power supply designs, including offline flyback converters and LED lighting systems.

  3. Q: What is the input voltage range supported by UC2872NG4? A: UC2872NG4 can handle a wide input voltage range, typically from 85V AC to 265V AC.

  4. Q: What is the output power range that UC2872NG4 can handle? A: UC2872NG4 can support output power ranging from a few watts up to several tens of watts, depending on the specific design and application requirements.

  5. Q: Does UC2872NG4 have built-in protection features? A: Yes, UC2872NG4 incorporates various protection features such as overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown.

  6. Q: Can UC2872NG4 operate in continuous or discontinuous conduction mode? A: UC2872NG4 can operate in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), providing flexibility in different load conditions.

  7. Q: Is UC2872NG4 suitable for high-efficiency power supply designs? A: Yes, UC2872NG4 is designed to achieve high efficiency in power supply applications, thanks to its advanced control algorithms and low-power consumption.

  8. Q: Does UC2872NG4 support dimming control for LED lighting applications? A: Yes, UC2872NG4 offers various methods for implementing dimming control in LED lighting systems, such as pulse width modulation (PWM) and analog dimming.

  9. Q: Can UC2872NG4 operate in a wide temperature range? A: Yes, UC2872NG4 is designed to operate reliably in a wide temperature range, typically from -40°C to 125°C.

  10. Q: Are there any reference designs or application notes available for UC2872NG4? A: Yes, the manufacturer of UC2872NG4 provides reference designs and application notes that can help engineers in implementing the IC effectively in their designs.

Please note that the specific details and answers may vary depending on the manufacturer's documentation and the application requirements.