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Product details

Parameters

Drivers per package 8 Switching voltage (Max) (V) 50 Output voltage (Max) (V) 50 Peak output current (mA) 500 Delay time (Typ) (ns) 130 Input compatibility CMOS, TTL Vol @ lowest spec current (Typ) (mV) 900 Iout/ch (Max) (mA) 500 Iout_off (Typ) (uA) 50 Rating Catalog open-in-new Find other Low-side switches

Package | Pins | Size

SOIC (DW) 18 119 mm² 11.55 x 10.3 open-in-new Find other Low-side switches

Features

  • 500-mA-Rated Collector Current (Single Output)
  • High-Voltage Outputs: 50 V
  • Output Clamp Diodes
  • Inputs Compatible With Various Types of Logic
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Description

The ULN2803A device is a 50 V, 500 mA Darlington transistor array. The device consists of eight NPN Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The collector-current rating of each Darlington pair is 500 mA. The Darlington pairs may be connected in parallel for higher current capability.

Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic buffers. The ULN2803A device has a 2.7-kΩ series base resistor for each Darlington pair for operation directly with TTL or 5-V CMOS devices.

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Technical documentation

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Type Title Date
* Datasheet ULN2803A Darlington Transistor Arrays datasheet (Rev. H) Feb. 14, 2017
White papers 11 Ways to Protect Your Power Path white paper Jul. 03, 2019
Application notes Basics of Power Switches (Rev. A) Apr. 26, 2019
Technical articles How can a load switch extend your device’s battery life? Mar. 20, 2018
Technical articles How and why you should use load switches for power sequencing Feb. 06, 2018
Technical articles How to use load switches and eFuses in your set-top box design Nov. 23, 2017
Technical articles Don’t leave it floating! Power off your outputs with quick output discharge Dec. 09, 2016
Application notes Stepper Motor Driving with Peripheral Drivers (Rev. A) Dec. 02, 2016
Application notes Improved Thermal Dissipation and Energy Efficiency for Peripheral Driving Oct. 30, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

DEVELOPMENT KITS Download
document-generic User guide
$25.00
Description
The BOOSTXL-ULN2003 is 2A stepper motor driver kit which features TI's ULN2003A bipolar transistor array and the CSD1751Q2 NexFET™. This BoosterPack™ contains everything needed to drive up to 2 stepper motors or 8 channels, with up to 30V and supports both serial and parallel interfaces (...)
Features
  • 3.3V, 5V to 30V Selectable split rail supplies for analog and MCU
  • Supports up to 2.5A peak total current, 500mA per channel with up to 8 channels
  • Direct interface per channel or serial shift-register adressable inputs
  • Complete stepper motor driver stage in ultra small form factor (17.46mm x 22.23 mm)
  • (...)

CAD/CAE symbols

Package Pins Download
SOIC (DW) 18 View options

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