UDN2981A

Product Overview

Category: Integrated Circuit (IC)

Use: The UDN2981A is a high-voltage, high-current source driver designed for use in applications that require driving loads such as relays, solenoids, and lamps. It is commonly used in industrial automation, robotics, and automotive systems.

Characteristics: - High-voltage capability (up to 50V) - High-current sourcing capability (up to 500mA) - Compatible with various logic families - Low saturation voltage - Built-in clamp diodes for inductive load protection

Package: The UDN2981A is available in a 16-pin DIP (Dual In-line Package) or SOIC (Small Outline Integrated Circuit) package.

Essence: The UDN2981A serves as an interface between low-power control signals from microcontrollers or other logic devices and high-power loads. It provides the necessary current amplification and isolation to drive these loads efficiently and reliably.

Packaging/Quantity: The UDN2981A is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Supply Voltage: 5V to 50V
• Output Current: Up to 500mA per channel
• Input Logic Voltage: 3.3V to 5V
• Number of Channels: 8
• Maximum On-State Voltage Drop: 1.2V at 350mA
• Maximum Off-State Leakage Current: 100μA at 50V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The UDN2981A has a total of 16 pins, which are assigned as follows:

1. Output Channel 1
2. Output Channel 2
3. Output Channel 3
4. Output Channel 4
5. Output Channel 5
6. Output Channel 6
7. Output Channel 7
8. Output Channel 8
9. Ground (GND)
10. Input Channel 1
11. Input Channel 2
12. Input Channel 3
13. Input Channel 4
14. Input Channel 5
15. Input Channel 6
16. Input Channel 7

Functional Features

• High-voltage and high-current sourcing capability allows driving of various loads.
• Built-in clamp diodes protect against voltage spikes generated by inductive loads.
• Compatible with a wide range of logic families, making it versatile for different applications.
• Low saturation voltage minimizes power dissipation and heat generation.
• Provides isolation between the control signals and the load, enhancing system safety.

Advantages and Disadvantages

Advantages: - High-voltage and high-current capability - Compatibility with different logic families - Built-in protection against voltage spikes - Isolation between control signals and load

Disadvantages: - Limited number of channels (8 channels)

Working Principles

The UDN2981A operates by receiving low-power control signals from a microcontroller or other logic devices. These control signals are then amplified and used to drive the corresponding output channels. The device utilizes Darlington transistor arrays, which provide high current gain and allow efficient switching of high-power loads. The built-in clamp diodes protect the device and the connected load from voltage spikes that occur when driving inductive loads.

Detailed Application Field Plans

The UDN2981A finds applications in various fields, including: - Industrial automation systems - Robotics - Automotive systems - Home automation - Power distribution systems

In industrial automation, it can be used to control relays, solenoids, and lamps. In robotics, it can drive motors and actuators. In automotive systems, it can control lighting systems and other high-power loads. In home automation, it can be utilized for controlling appliances and lighting. In power distribution systems, it can switch high-voltage loads.

Detailed and Complete Alternative Models

Some alternative models to the UDN2981A include: - ULN2803A - ULN2003A - TPIC6B595 - SN754410 - L293D

These alternatives offer similar functionality and are widely used in various applications requiring high-voltage and high-current sourcing capabilities.

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