ULN2804APG,N

Basic Information Overview

• Category: Integrated Circuit
• Use: High-voltage, high-current Darlington transistor array
• Characteristics:
  • Contains seven open-collector Darlington pairs with common emitters
  • Each pair can handle up to 500 mA (600 mA peak) and 50 V
  • Provides a convenient interface between low-level logic signals and higher-power loads
• Package: DIP (Dual In-line Package)
• Essence: Transistor Array
• Packaging/Quantity: Tube packaging, 25 pieces per tube

Specifications

• Supply Voltage: 5 V to 30 V
• Output Voltage: Up to 50 V
• Output Current: Up to 500 mA per channel (600 mA peak)
• Input Voltage: 0 V to 5 V
• Input Current: 2.7 mA (max)
• Operating Temperature Range: -20°C to +85°C

Detailed Pin Configuration

1. COM
2. IN1
3. OUT1
4. GND
5. OUT2
6. IN2
7. OUT3
8. IN3
9. OUT4
10. IN4
11. OUT5
12. IN5
13. OUT6
14. IN6
15. OUT7
16. IN7
17. VCC

Functional Features

• High-Voltage and High-Current Capability: The ULN2804APG,N is designed to handle high voltages (up to 50 V) and high currents (up to 500 mA per channel).
• Darlington Pair Configuration: Each output channel consists of a Darlington pair, which provides high current gain and allows the IC to drive higher-power loads.
• Open-Collector Outputs: The outputs are open-collector, allowing for easy interfacing with other logic circuits or devices.
• Common Emitters: The seven Darlington pairs share a common emitter, simplifying the circuit design and reducing component count.

Advantages

• High current and voltage handling capability
• Easy interface with low-level logic signals
• Compact and convenient package
• Common emitter configuration reduces complexity in circuit design

Disadvantages

• Limited number of output channels (7)
• Requires external diodes for inductive load protection

Working Principles

The ULN2804APG,N is based on the Darlington transistor pair configuration. Each output channel consists of two transistors connected in a Darlington configuration, providing high current gain. When an input signal is applied to the corresponding input pin, the Darlington pair turns on, allowing current to flow through the output pin. The open-collector outputs require an external pull-up resistor to provide the desired output voltage level.

Detailed Application Field Plans

The ULN2804APG,N is commonly used in various applications where there is a need to control higher-power loads using low-level logic signals. Some typical application fields include:

1. Motor Control: The IC can be used to drive stepper motors, DC motors, and solenoids.
2. Relay Driving: It can be employed to control relays in industrial automation systems.
3. Lamp and LED Control: The ULN2804APG,N can be utilized to switch lamps and LEDs in lighting applications.
4. Display Drivers: It can be used as a driver for segment displays, dot matrix displays, and alphanumeric displays.
5. Audio Amplifiers: The IC can be part of audio amplifier circuits, driving speakers or headphones.

Detailed and Complete Alternative Models

Some alternative models that serve similar purposes are:

1. ULN2003A: Similar to ULN2804APG,N but with fewer output channels (7 channels).
2. ULN2803A: Similar to ULN2804APG,N but with eight output channels.
3. ULN2802A: Similar to ULN2804APG,N but with six output channels.

These alternative models can be chosen based on the specific requirements of the application, such as the number of output channels needed.

Word count: 498 words