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ULN2004ADG4
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ULN2004ADG4

Product Overview

Category

The ULN2004ADG4 belongs to the category of high-voltage, high-current Darlington transistor arrays.

Use

It is commonly used as a driver for inductive loads such as relays, solenoids, and stepper motors.

Characteristics

  • High-voltage and high-current capability
  • Suitable for driving inductive loads
  • Integrated protection diodes
  • Wide operating voltage range

Package

The ULN2004ADG4 comes in a 16-pin SOIC (Small Outline Integrated Circuit) package.

Packaging/Quantity

It is typically available in reels with quantities varying based on supplier specifications.

Specifications

  • Maximum Output Current: 500 mA per channel
  • Maximum Output Voltage: 50 V
  • Input Voltage Range: 3 V to 15 V
  • Operating Temperature Range: -20°C to 85°C

Detailed Pin Configuration

The ULN2004ADG4 has 16 pins arranged in a dual in-line package (DIP). The pin configuration is as follows: 1. Input 1 2. Ground 3. Output 1 4. Input 2 5. Output 2 6. Input 3 7. Output 3 8. Input 4 9. Output 4 10. Input 5 11. Output 5 12. Input 6 13. Output 6 14. Input 7 15. Output 7 16. Vcc

Functional Features

  • Each channel of the ULN2004ADG4 consists of a Darlington pair which provides high current gain.
  • Integrated suppression diodes for inductive load protection.
  • Common-cathode clamp diodes for switching inductive loads.

Advantages and Disadvantages

Advantages

  • High current and voltage capability
  • Integrated diode protection
  • Suitable for driving inductive loads

Disadvantages

  • Limited maximum output current per channel
  • Higher power dissipation compared to MOSFET-based drivers

Working Principles

The ULN2004ADG4 operates by amplifying the input signals to control the flow of current through the connected inductive loads. The integrated diodes provide protection against back EMF generated by inductive loads.

Detailed Application Field Plans

The ULN2004ADG4 is widely used in various applications including: - Relay drivers in industrial control systems - Stepper motor drivers in robotics and automation - Solenoid drivers in automotive systems

Detailed and Complete Alternative Models

Some alternative models to the ULN2004ADG4 include: - ULN2803A: Similar high-voltage, high-current Darlington transistor array with 8 channels - L293D: H-bridge motor driver with built-in diodes for inductive load protection

In conclusion, the ULN2004ADG4 is a versatile and reliable driver for inductive loads, offering high-voltage and high-current capabilities along with integrated protection features. Its widespread use in various applications makes it a popular choice among electronics designers and engineers.

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Перечислите 10 распространенных вопросов и ответов, связанных с применением ULN2004ADG4 в технических решениях.

  1. What is ULN2004ADG4?

    • ULN2004ADG4 is a high-voltage, high-current Darlington transistor array commonly used for driving inductive loads such as relays, solenoids, and stepper motors.

  2. What is the maximum voltage and current rating of ULN2004ADG4?

    • The ULN2004ADG4 can handle a maximum voltage of 50V and a continuous output current of 500mA per channel.

  3. How many channels does ULN2004ADG4 have?

    • ULN2004ADG4 has 7 channels, each consisting of a Darlington pair.

  4. Can ULN2004ADG4 be used to drive DC motors?

    • Yes, ULN2004ADG4 can be used to drive small DC motors within its current rating.

  5. What are the typical applications of ULN2004ADG4?

    • Typical applications include relay drivers, stepper motor drivers, LED displays, and lamp drivers.

  6. Does ULN2004ADG4 require external freewheeling diodes for inductive loads?

    • No, ULN2004ADG4 includes integral suppression diodes for inductive loads, eliminating the need for external diodes.

  7. What is the input logic compatibility of ULN2004ADG4?

    • ULN2004ADG4 is compatible with TTL, DTL, PMOS, CMOS, and other logic families.

  8. Can ULN2004ADG4 be used in automotive applications?

    • Yes, ULN2004ADG4 is suitable for automotive applications due to its high-voltage and high-current capabilities.

  9. What is the thermal resistance of ULN2004ADG4?

    • The thermal resistance from junction to ambient for ULN2004ADG4 is typically 100°C/W.

  10. Is ULN2004ADG4 available in surface mount packages?

    • Yes, ULN2004ADG4 is available in surface mount packages, making it suitable for compact designs and PCB integration.