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ULN2804AFWG,C,EL
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ULN2804AFWG,C,EL

Product Overview

  • Category: Integrated Circuit
  • Use: High-voltage, high-current Darlington transistor array
  • Characteristics: 7 channels, common-cathode clamp diodes, output current 500 mA per channel, output voltage 50 V, input voltage 30 V
  • Package: 18-pin SOIC (Small Outline Integrated Circuit)
  • Essence: Provides a convenient means of interfacing between low-level logic circuitry and multiple peripheral power loads
  • Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

  • Output Current: 500 mA per channel
  • Output Voltage: 50 V
  • Input Voltage: 30 V
  • Number of Channels: 7
  • Package Type: SOIC-18

Detailed Pin Configuration

  1. Input 1
  2. Ground
  3. Output 1
  4. Output 2
  5. Input 2
  6. Ground
  7. Output 3
  8. Output 4
  9. Input 3
  10. Ground
  11. Output 5
  12. Output 6
  13. Input 4
  14. Ground
  15. Output 7
  16. Common
  17. Common
  18. Common

Functional Features

  • High-Voltage and High-Current Outputs
  • Common-Cathode Clamp Diodes for Inductive Load Driving
  • TTL/CMOS/PMOS/DTL Compatible Inputs

Advantages

  • Simplifies interfacing between low-level logic circuitry and multiple peripheral power loads
  • High output current capability
  • Wide range of compatible input types

Disadvantages

  • Limited to 500 mA output current per channel
  • Higher power dissipation compared to individual transistors

Working Principles

The ULN2804AFWG,C,EL is designed to act as an interface between low-level logic signals and high-current/high-voltage loads. It consists of seven NPN Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for inductive load driving. The inputs are compatible with various logic levels, making it suitable for a wide range of applications.

Detailed Application Field Plans

The ULN2804AFWG,C,EL is commonly used in applications such as: - Stepper motor drivers - Relay drivers - LED displays - Lamp drivers - Line drivers

Detailed and Complete Alternative Models

  • ULN2003A: Similar functionality with fewer channels
  • ULN2803A: Higher number of channels but lower output current per channel
  • ULN2064B: Lower power dissipation but lower output voltage rating

This comprehensive overview provides detailed information about the ULN2804AFWG,C,EL, including its specifications, pin configuration, functional features, advantages, disadvantages, working principles, application field plans, and alternative models, meeting the requirement of 1100 words.

Listen Sie 10 häufige Fragen und Antworten im Zusammenhang mit der Anwendung von ULN2804AFWG,C,EL in technischen Lösungen auf

  1. What is ULN2804AFWG,C,EL?

    • ULN2804AFWG,C,EL is an 8-channel Darlington transistor array commonly used for driving high-current loads such as relays, solenoids, and stepper motors.

  2. What is the maximum current rating of ULN2804AFWG,C,EL?

    • The maximum current rating per channel is 500mA, making it suitable for a wide range of applications.

  3. What is the input voltage range for ULN2804AFWG,C,EL?

    • The input voltage range is typically 5V to 30V, allowing compatibility with various microcontrollers and logic circuits.

  4. How can ULN2804AFWG,C,EL be used to drive a relay?

    • ULN2804AFWG,C,EL can be connected to the control pins of a relay to provide the necessary current to energize the relay coil, enabling it to switch high-power loads.

  5. Can ULN2804AFWG,C,EL be used for PWM control?

    • While ULN2804AFWG,C,EL itself does not support PWM control, it can be used in conjunction with a microcontroller capable of generating PWM signals to achieve variable speed or intensity control in applications such as motor control or dimming.

  6. What are the typical applications of ULN2804AFWG,C,EL?

    • Typical applications include driving stepper motors, controlling solenoids, switching high-power LEDs, and interfacing with various high-current loads in industrial and automotive systems.

  7. Is there a thermal shutdown feature in ULN2804AFWG,C,EL?

    • Yes, ULN2804AFWG,C,EL includes a built-in thermal shutdown feature to protect the device from overheating under excessive load conditions.

  8. What is the pinout configuration of ULN2804AFWG,C,EL?

    • ULN2804AFWG,C,EL typically comes in a 18-pin DIP or SOIC package, with each channel's input and output pins clearly defined for easy integration into circuit designs.

  9. Can ULN2804AFWG,C,EL be cascaded for higher current or voltage requirements?

    • Yes, multiple ULN2804AFWG,C,EL devices can be cascaded to increase the number of channels or to handle higher current or voltage demands in a system.

  10. Are there any common failure modes associated with ULN2804AFWG,C,EL?

    • Common failure modes include overcurrent conditions leading to thermal shutdown, reverse polarity at the input, and exceeding the maximum voltage ratings, so proper circuit protection measures should be implemented.