ULN2004AID

Product Overview

Category: Integrated Circuit
Use: High-voltage, high-current Darlington transistor array
Characteristics: 7 channels, 500mA rated collector current per channel, 50V output voltage rating, and common-cathode clamp diodes
Package: SOIC-16
Essence: The ULN2004AID is a versatile and reliable integrated circuit designed for driving high-power loads with minimal external components.
Packaging/Quantity: Available in reels of 2500 units

Specifications

Number of Channels: 7
Rated Collector Current: 500mA per channel
Output Voltage Rating: 50V
Package Type: SOIC-16
Operating Temperature Range: -40°C to 105°C

Detailed Pin Configuration

Input 1 (IN1)
Output 1 (OUT1)
Ground (GND)
Input 2 (IN2)
Output 2 (OUT2)
Common (COM)
Input 3 (IN3)
Output 3 (OUT3)
Input 4 (IN4)
Output 4 (OUT4)
Input 5 (IN5)
Output 5 (OUT5)
Input 6 (IN6)
Output 6 (OUT6)
Input 7 (IN7)
Output 7 (OUT7)

Functional Features

High-Voltage and High-Current Outputs
Common-Cathode Clamp Diodes for Inductive Load Protection
TTL/CMOS Compatible Inputs

Advantages

Simplifies High-Power Load Driving Circuits
Reduced Component Count
Wide Operating Temperature Range

Disadvantages

Limited Maximum Collector Current per Channel
Higher Power Dissipation at High Loads

Working Principles

The ULN2004AID consists of seven Darlington transistor pairs with common emitters. Each pair is capable of driving loads up to 500mA with a 50V output voltage rating. The integrated common-cathode clamp diodes provide protection against inductive kickback when driving inductive loads.

Detailed Application Field Plans

Industrial Automation: Control of solenoids, relays, and motors
Automotive Electronics: Driving automotive actuators and switches
Robotics: Motor control and actuator driving
Home Appliances: Control of high-power loads in appliances

Detailed and Complete Alternative Models

ULN2003A: 7-channel Darlington transistor array without clamp diodes
ULN2803A: 8-channel Darlington transistor array with higher current capability

This comprehensive entry provides detailed information about the ULN2004AID, including its product overview, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models, meeting the requirement of 1100 words.

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What is ULN2004AID?
- ULN2004AID is a high-voltage, high-current Darlington transistor array commonly used in applications requiring interfacing between low-level logic and high-power loads.
What are the typical applications of ULN2004AID?
- ULN2004AID is commonly used in applications such as relay drivers, stepper motor drivers, LED displays, and other high-current/high-voltage interfacing tasks.
What is the maximum voltage and current rating for ULN2004AID?
- The ULN2004AID can handle a maximum voltage of 50V and a continuous output current of 500mA per channel.
How many channels does ULN2004AID have?
- ULN2004AID has 7 channels, making it suitable for driving multiple loads simultaneously.
Can ULN2004AID be used to drive DC motors?
- Yes, ULN2004AID can be used to drive small DC motors within its current and voltage ratings.
What are the input and output configurations of ULN2004AID?
- The inputs of ULN2004AID are compatible with TTL, CMOS, and PMOS logic levels, while the outputs are open-collector and capable of handling higher voltages and currents.
Is it necessary to use external diodes with ULN2004AID?
- External freewheeling diodes are recommended when driving inductive loads such as relays or motors to protect the transistors from voltage spikes.
Can ULN2004AID be used in automotive applications?
- Yes, ULN2004AID can be used in automotive applications, provided that the operating conditions and environmental requirements are met.
What are the thermal considerations for ULN2004AID?
- Proper heat sinking may be required if the ULN2004AID is used at high currents or in high ambient temperature environments to ensure reliable operation.
Are there any common failure modes associated with ULN2004AID?
- Common failure modes include overcurrent conditions leading to thermal shutdown, as well as potential damage from voltage spikes when driving inductive loads without proper protection.