IR2108

Product Overview

Category: Integrated Circuit (IC)

Use: The IR2108 is a high voltage, high-speed power MOSFET and IGBT driver IC. It is specifically designed to drive power switches in applications such as motor drives, inverters, and switching power supplies.

Characteristics: - High voltage capability - Fast switching speed - Low power consumption - Wide operating temperature range - Compact package size

Package: The IR2108 is available in a compact 8-pin DIP (Dual Inline Package) or SOIC (Small Outline Integrated Circuit) package.

Essence: The IR2108 is an essential component for driving power MOSFETs and IGBTs in various power electronic applications.

Packaging/Quantity: The IR2108 is typically sold in reels or tubes containing multiple units. The exact quantity depends on the supplier and customer requirements.

Specifications

• Supply Voltage: 10V - 20V
• Output Current: 200mA
• Operating Temperature Range: -40°C to 125°C
• Maximum PWM Frequency: 500kHz
• Propagation Delay Time: 120ns
• Rise/Fall Time: 50ns

Pin Configuration

The IR2108 has 8 pins arranged as follows:

1. VCC: Power supply input
2. VB: Bootstrap supply input for high-side gate driver
3. HO: High-side gate driver output
4. LO: Low-side gate driver output
5. COM: Common ground for gate drivers
6. SD: Shutdown input for disabling the outputs
7. VS: Sense voltage input for overcurrent protection
8. GND: Ground reference

Functional Features

• High voltage level shifting
• Undervoltage lockout protection
• Overcurrent protection
• Shoot-through prevention
• Adjustable dead-time control
• Shutdown input for system protection

Advantages and Disadvantages

Advantages: - High voltage capability allows driving of power MOSFETs and IGBTs in various applications - Fast switching speed enables efficient power conversion - Low power consumption reduces energy losses - Wide operating temperature range ensures reliable operation in harsh environments - Compact package size facilitates integration into space-constrained designs

Disadvantages: - Limited output current may restrict usage in high-power applications - Proprietary nature of the IC may limit availability from alternative manufacturers

Working Principles

The IR2108 operates by receiving control signals from a microcontroller or other control circuitry. It provides the necessary voltage and current levels to drive the gates of power MOSFETs or IGBTs, enabling them to switch on and off rapidly. This switching action controls the flow of current through the power devices, allowing efficient power conversion.

Detailed Application Field Plans

The IR2108 finds application in various fields, including: 1. Motor drives: Controlling the speed and direction of electric motors. 2. Inverters: Converting DC power to AC power in applications such as solar inverters and uninterruptible power supplies (UPS). 3. Switching power supplies: Regulating and converting electrical power efficiently.

Alternative Models

While the IR2108 is a widely used IC, there are alternative models available from different manufacturers. Some popular alternatives include: - IRS2104 - HIP4081A - TC4427

These alternative models offer similar functionality and can be considered based on specific application requirements.

In conclusion, the IR2108 is a high voltage, high-speed power MOSFET and IGBT driver IC. Its compact package, fast switching speed, and wide operating temperature range make it suitable for various power electronic applications. However, its limited output current and proprietary nature should be considered when selecting alternative models.