Overview
The ULN2802A, produced by STMicroelectronics, is a high-current Darlington array integrated circuit. It contains eight Darlington transistors with common emitters and integral suppression diodes, making it suitable for driving inductive loads. This device is designed to simplify interfacing with various logic families, including PMOS, TTL, and CMOS. The ULN2802A is particularly tailored for applications requiring a 10.5 kΩ input resistor and Zener diode for 14-25 V PMOS logic levels.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current (Continuous) | 500 | mA |
| Output Voltage | 50 | V |
| Input Resistor | 10.5 kΩ | |
| Input Voltage Range | 14-25 V | |
| Operating Ambient Temperature Range | -20 to 85 | °C |
| Storage Temperature Range | -55 to 150 | °C |
| Junction Temperature Range | -20 to 150 | °C |
| Thermal Resistance Junction-Ambient | 55 | °C/W |
| Package Type | PDIP 18 |
Key Features
- Eight Darlington transistors with common emitters
- Integral suppression diodes for inductive loads
- Output current up to 500 mA (continuous) and peak load current rating of 600 mA
- Output voltage up to 50 V
- Outputs can be paralleled for higher current capability
- Inputs pinned opposite outputs to simplify board layout
- Designed for interfacing with 14-25 V PMOS logic families
- Supplied in an 18-lead plastic DIP package with copper lead form
Applications
The ULN2802A is versatile and can be used in various applications, including:
- Driving inductive loads such as relays, solenoids, and DC motors
- Interfacing with PMOS logic families in the 14-25 V range
- General-purpose driver applications where high current and voltage handling are required
- Automotive and industrial control systems
- Printers, plotters, and other peripheral devices
Q & A
- What is the ULN2802A?
The ULN2802A is an integrated circuit containing eight Darlington transistors with common emitters and integral suppression diodes, designed for high-current applications.
- What is the output current rating of the ULN2802A?
The ULN2802A has a continuous output current rating of 500 mA and a peak load current rating of 600 mA.
- What is the maximum output voltage the ULN2802A can handle?
The ULN2802A can handle output voltages up to 50 V.
- What type of package is the ULN2802A available in?
The ULN2802A is available in an 18-lead plastic DIP package with a copper lead form.
- Can the outputs of the ULN2802A be paralleled?
- What is the operating ambient temperature range for the ULN2802A?
The operating ambient temperature range for the ULN2802A is -20 to 85°C.
- What logic families is the ULN2802A designed to interface with?
The ULN2802A is designed to interface with 14-25 V PMOS logic families.
- What is the thermal resistance junction-ambient for the ULN2802A?
The thermal resistance junction-ambient for the ULN2802A is 55°C/W.
- Does the ULN2802A have built-in suppression diodes?
- How does the pinout of the ULN2802A simplify board layout?
The inputs are pinned opposite the outputs, which simplifies board layout.
