IR2118

Product Overview

Category: Integrated Circuit (IC)

Use: The IR2118 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 switch-mode power supplies.

Characteristics: - High voltage capability - Fast switching speed - Low power consumption - Protection features for reliable operation - Compact package size

Package: The IR2118 is available in a compact 8-pin DIP (Dual In-line Package) or SOIC (Small Outline Integrated Circuit) package.

Essence: The essence of the IR2118 lies in its ability to provide efficient and reliable control signals to power switches, ensuring optimal performance and protection in various power electronic applications.

Packaging/Quantity: The IR2118 is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Supply Voltage: 10V - 20V
• Output Current: ±2A
• Input Logic Levels: TTL/CMOS compatible
• Operating Temperature Range: -40°C to +125°C
• Maximum Power Dissipation: 1.5W

Pin Configuration

The IR2118 features an 8-pin configuration with the following pin assignments:

1. VCC: Positive supply voltage
2. VB: Bootstrap supply voltage
3. HO: High-side gate driver output
4. LO: Low-side gate driver output
5. VS: High-side floating supply return
6. COM: Common connection for bootstrap and logic circuits
7. LIN: Logic input
8. GND: Ground reference

Functional Features

• High voltage level shifting
• Undervoltage lockout protection
• Overcurrent shutdown protection
• Shoot-through prevention logic
• Short propagation delays for fast switching
• Bootstrap capacitor undervoltage detection

Advantages and Disadvantages

Advantages: - High voltage capability allows driving of power switches in various applications - Fast switching speed enables efficient operation - Low power consumption for improved energy efficiency - Protection features enhance system reliability - Compact package size facilitates space-saving designs

Disadvantages: - Limited output current may restrict usage in high-power applications - Requires external bootstrap capacitor for proper operation

Working Principles

The IR2118 operates by receiving logic input signals and generating corresponding gate drive signals for the power switches. It utilizes a bootstrap circuit to provide the necessary voltage levels for driving the high-side switch. The IC incorporates protection features such as undervoltage lockout and overcurrent shutdown to ensure safe and reliable operation.

Application Field Plans

The IR2118 finds extensive application in the following fields:

1. Motor Drives: Enables precise control of motor speed and direction in electric vehicles, industrial machinery, and robotics.
2. Inverters: Facilitates efficient conversion of DC power to AC power in renewable energy systems and uninterruptible power supplies.
3. Switch-Mode Power Supplies: Enhances the performance and efficiency of power supply units used in electronic devices and appliances.

Alternative Models

For users seeking alternatives to the IR2118, the following models can be considered:

1. IR2110: Similar functionality with slightly different specifications.
2. IRS2113: Dual high-side and low-side driver with additional features.
3. MCP1407: MOSFET driver IC with integrated charge pump for high voltage applications.

These alternative models offer similar capabilities and can be suitable replacements depending on specific requirements.

In conclusion, the IR2118 is a versatile IC designed for driving power switches in various applications. Its high voltage capability, fast switching speed, and protection features make it an ideal choice for power electronic systems. With its compact package and reliable performance, the IR2118 contributes to efficient and safe operation in motor drives, inverters, and switch-mode power supplies.