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ULN2803ADWR

Name: ULN2803ADWR
Rating: 4.7 (12 reviews)

TRANS 8NPN DARL 50V 0.5A 18SO

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規格

Part Status	Obsolete
Base Product Number	ULN2803
Transistor Type	8 NPN Darlington
Current - Collector (Ic) (Max)	500mA
Voltage - Collector Emitter Breakdown (Max)	50V
Vce Saturation (Max) @ Ib, Ic	1.6V @ 500µA, 350mA
Current - Collector Cutoff (Max)	50µA
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount
Package	18-SOIC (0.295", 7.50mm Width)
Supplier Device Package	18-SOIC
Packaging	Tape & Reel (TR)

概述

Description

The ULN2803ADWR is an integrated circuit (IC) designed for driving multiple loads such as relays, motors, and lamps. It contains eight Darlington transistor pairs, allowing it to switch significant current loads with low input power. Each channel can handle up to 500 mA and withstand voltage up to 50 V, making it suitable for various applications in automation and control systems.
The IC features built-in flyback diodes, which protect against voltage spikes generated when inductive loads are switched off. It is commonly used in interfacing microcontrollers and logic devices with high-power loads. The ULN2803ADWR is available in a 20-pin surface-mount package (DWR), facilitating easy integration into PCB designs.
Typical applications include driving stepper motors, controlling lighting, and operating solenoids. The device is ideal for projects requiring multiple output control with minimal complexity and is favored for its reliability and efficiency in switching applications.

Features

The ULN2803ADWR is an octal relay driver IC featuring the following key characteristics:
1. High-Voltage Capability: Operates with a supply voltage up to 50V, suitable for driving various loads.
2. Current Handling: Each output can handle up to 500 mA, accommodating high-current applications.
3. Darlington Pair Configuration: Each output is a Darlington pair, providing high current gain.
4. Open-Collector Outputs: Allows for flexible interfacing with various voltage levels and load types.
5. Built-in Flyback Diodes: Integrated protection against voltage spikes from inductive loads, ensuring safe operation.
6. Logic Level Compatibility: Compatible with TTL and CMOS logic levels, simplifying interfacing with microcontrollers.
7. Compact Package: Available in a wide SOIC package, facilitating space-efficient designs.
These features make the ULN2803ADWR ideal for driving relays, lamps, and other inductive loads in automation and control applications.

Package

The ULN2803ADWR is packaged in a 20-pin TSSOP (Thin Shrink Small Outline Package). This compact package type is designed for surface mounting and provides space efficiency in electronic applications.

Pinout

The ULN2803ADWR is an integrated circuit that contains eight high-voltage, high-current Darlington transistor arrays. It features a total of 18 pins.
Pin Count and Functions:
- Pins 1-8: Inputs (IN1 to IN8) - These pins receive control signals; they are connected to a microcontroller or other logic circuits.
- Pins 9-16: Outputs (OUT1 to OUT8) - These pins connect to the loads (such as motors, relays, or lamps) being driven by the IC.
- Pin 17: Common Emitter (COM) - This pin is typically connected to the positive supply voltage (e.g., V+), which allows for suppression of inductive kickback when driving inductive loads.
- Pin 18: Ground (GND) - This pin must be connected to the ground of the circuit.
The ULN2803ADWR is commonly used in applications requiring control of multiple high-current loads with a microcontroller or other low-power logic devices.

Manufacturer

The ULN2803ADWR is manufactured by Texas Instruments, a prominent semiconductor company based in the United States. Texas Instruments (TI) specializes in designing and producing a wide range of analog and digital semiconductor solutions, including integrated circuits (ICs), embedded processors, and microcontrollers. The company serves various industries, including automotive, industrial, communications, and consumer electronics. Texas Instruments is known for its innovation, quality, and extensive product portfolio, making it a leader in the electronics market.

Application

The ULN2803ADWR is a high-voltage, high-current Darlington transistor array commonly used in applications such as driving relays, lamps, heavy loads, and motors. It is also utilized in controlling LED displays, interfacing with microcontrollers, and providing high-current outputs for automation systems. Its ability to handle multiple outputs makes it ideal for applications in robotics, industrial control systems, and home automation.

Equivalent

The ULN2803ADWR is a popular octal Darlington driver. Equivalent products include the ULN2803A, ULN2003A, and ULN2008A. Other compatible alternatives are the TIP120, TIP121, and TIP122, though these may require different configurations. Always verify specifications for pin compatibility and electrical characteristics when selecting an alternative.