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ULN2803AFW

Name: ULN2803AFW
Rating: 4.7 (12 reviews)

Darlington Transistors Integrated Circuits (ICs)

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仕様

Packaging	Tube
Standard Pack Qty	40

概要

Description

The ULN2803AFW is an integrated circuit (IC) designed for driving higher current loads, such as relays, motors, and lamps, using low-power control signals from microcontrollers or other logic devices. It consists of eight NPN Darlington transistor pairs, each capable of handling up to 500 mA of current and supporting a maximum voltage of 50 V.
The ULN2803AFW features built-in flyback diodes that protect the circuit from voltage spikes when inductive loads are switched off, making it ideal for interfacing with devices that require higher voltage and current. The IC operates with a common ground and can easily be connected in a parallel configuration to further increase current capacity.
It is commonly used in automation, robotics, and various control applications where a single control signal needs to switch multiple high-power loads. The ULN2803AFW is available in a compact DIP package, making it suitable for both prototyping and production environments.

Features

The ULN2803AFW is a high-voltage, high-current Darlington transistor array designed for driving inductive loads such as relays, motors, and lamps. Key features include:
1. Eight Darlington Pairs: Provides compact and efficient control of multiple outputs.
2. High Current Handling: Each output can handle up to 500 mA with a maximum voltage of 50 V.
3. Integrated Flyback Diodes: Protects against back EMF from inductive loads.
4. Wide Operating Voltage Range: Accepts a supply voltage from 5 V to 50 V.
5. Common Ground Configuration: Simplifies circuit design and integration.
6. TTL/CMOS Compatible Inputs: Easily interfaces with low-voltage digital logic.
7. Compact Package: Available in a SOP-18 package for space-efficient designs.
These features make the ULN2803AFW suitable for a variety of applications in automation, control systems, and electronic devices.

Package

The ULN2803AFW is packaged in a DIP (Dual In-line Package) format, specifically a 18-pin plastic package. It is designed for easy integration into circuits for driving high-current loads with multiple output channels.

Pinout

The ULN2803AFW is an integrated circuit consisting of eight NPN Darlington transistor arrays. It typically comes in a 18-pin package. The pin configuration is as follows:
1. Input Pins (1-8): Pins 1, 2, 3, 4, 5, 6, 7, and 8 are the input pins where control signals are applied.
2. Common Collector Pins (9, 10): Pin 9 is the common pin for the outputs. It can be connected to the positive supply voltage to enable the transistors to turn on when signals are input.
3. Output Pins (11-18): Pins 11, 12, 13, 14, 15, 16, 17, and 18 are the output pins that connect to the load being driven, corresponding to each input pin.
The ULN2803AFW is commonly used for driving relays, motors, and other inductive loads, as it can handle higher current and voltage than standard logic ICs.

Manufacturer

The ULN2803AFW is manufactured by Texas Instruments, a well-known semiconductor company. Texas Instruments (TI) specializes in designing and producing a wide range of electronic components, including integrated circuits, analog devices, and microcontrollers. The company is recognized for its innovation in the field of electronics, serving various industries such as automotive, industrial, communications, and consumer electronics. TI is known for its commitment to quality and reliability, making it a prominent player in the global semiconductor market.

Application

The ULN2803AFW is a high-voltage, high-current Darlington transistor array commonly used in applications such as relay driving, motor control, and lighting control. It can interface with microcontrollers to switch loads like lamps, solenoids, and sensors. Additionally, it's utilized in automation systems and industrial control circuits, providing efficient signal buffering and amplification in various electronic projects.

Equivalent

The ULN2803AFW is a high-voltage, high-current Darlington transistor array. Equivalent products include:
1. ULN2003A
2. ULN2803A
3. M5450
4. MC34151
5. TC4427
These alternatives may vary in specifications, such as the number of channels and maximum voltage/current ratings, so be sure to check datasheets for compatibility in specific applications.