ON Semiconductor
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NCP2811BDTBR2G
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NCP2811BDTBR2G

Introduction

The NCP2811BDTBR2G is a voltage mode PWM controller designed for use in power supply applications. This device offers a range of features and characteristics that make it suitable for various applications.

Basic Information Overview

  • Category: Voltage Mode PWM Controller
  • Use: Power supply applications
  • Characteristics: High efficiency, precise control, wide input voltage range
  • Package: DFN-10 (3x3)
  • Essence: Regulating and controlling the output voltage in power supply circuits
  • Packaging/Quantity: Available in tape and reel packaging, quantity varies based on supplier

Specifications

  • Input Voltage Range: 4.5V to 14V
  • Output Voltage Range: 0.8V to 6V
  • Operating Temperature Range: -40°C to 125°C
  • Switching Frequency: Adjustable up to 2MHz
  • Protection Features: Overcurrent protection, overvoltage protection, undervoltage lockout

Detailed Pin Configuration

  1. COMP: Compensation pin
  2. FB: Feedback pin
  3. RT/CLK: Oscillator frequency setting pin
  4. SS/TR: Soft-start/tracking pin
  5. GND: Ground pin
  6. VCC: Supply voltage pin
  7. EN: Enable pin
  8. PGND: Power ground pin
  9. CS: Current sense pin
  10. SW: Switch node pin

Functional Features

  • Voltage mode PWM control
  • Adjustable switching frequency
  • Soft-start capability
  • Overcurrent and overvoltage protection
  • Precision reference voltage

Advantages and Disadvantages

Advantages

  • High efficiency
  • Wide input voltage range
  • Precise output voltage regulation
  • Comprehensive protection features

Disadvantages

  • Limited maximum switching frequency
  • Sensitivity to external noise in high-frequency applications

Working Principles

The NCP2811BDTBR2G operates by comparing the feedback voltage with an internal reference voltage and generating a PWM signal to control the power switch. The device continuously adjusts the duty cycle of the PWM signal to regulate the output voltage based on the feedback from the output.

Detailed Application Field Plans

The NCP2811BDTBR2G is well-suited for various power supply applications, including: - DC-DC converters - Point-of-load regulators - Battery-powered systems - Industrial power supplies

Detailed and Complete Alternative Models

  • NCP2820: Similar voltage mode PWM controller with integrated power MOSFET driver
  • LM5117: Wide-input voltage range synchronous buck controller
  • LT8610: High-efficiency monolithic synchronous buck regulator

In conclusion, the NCP2811BDTBR2G is a versatile voltage mode PWM controller with a wide range of applications in power supply designs. Its combination of features, specifications, and performance makes it a valuable component in various electronic systems.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق NCP2811BDTBR2G في الحلول التقنية

  1. What is the NCP2811BDTBR2G?

    • The NCP2811BDTBR2G is a high-performance, fixed-frequency current-mode controller for offline power supplies.

  2. What are the key features of the NCP2811BDTBR2G?

    • The key features include a wide input voltage range, integrated high-voltage startup, and comprehensive protection features.

  3. What are the typical applications of the NCP2811BDTBR2G?

    • Typical applications include AC-DC adapters, auxiliary power supplies, and LED lighting drivers.

  4. What is the maximum operating frequency of the NCP2811BDTBR2G?

    • The maximum operating frequency is typically 132 kHz.

  5. What type of protection features does the NCP2811BDTBR2G offer?

    • It offers overvoltage protection, overcurrent protection, and thermal shutdown protection.

  6. What is the input voltage range supported by the NCP2811BDTBR2G?

    • The input voltage range is typically from 85V to 265V.

  7. Does the NCP2811BDTBR2G require an external start-up resistor?

    • No, it has an integrated high-voltage start-up circuit.

  8. What is the output drive capability of the NCP2811BDTBR2G?

    • It can drive a power MOSFET directly.

  9. Is the NCP2811BDTBR2G suitable for flyback converter topologies?

    • Yes, it is well-suited for flyback converter designs.

  10. What are the recommended external components for implementing the NCP2811BDTBR2G in a design?

    • Recommended external components include a power MOSFET, output diode, and output capacitor.