IR21814

Product Overview

Category: Integrated Circuit (IC)

Use: The IR21814 is a high-speed, high-voltage gate driver IC designed for use in power electronics applications. It is specifically used to drive MOSFETs and IGBTs in half-bridge and full-bridge configurations.

Characteristics: - High-speed switching capability - High-voltage rating - Low power consumption - Compact package size - Robust design for reliable operation

Package: The IR21814 is available in a compact and industry-standard 8-pin DIP (Dual Inline Package) or SOIC (Small Outline Integrated Circuit) package.

Essence: The essence of the IR21814 lies in its ability to provide efficient and reliable gate driving for power electronic devices, ensuring optimal performance and protection against voltage spikes and transients.

Packaging/Quantity: The IR21814 is typically packaged in reels or tubes, with quantities varying depending on the manufacturer's specifications.

Specifications

• Supply Voltage: 10V - 20V
• Output Current: 2A
• Maximum Operating Frequency: 1MHz
• Propagation Delay: 120ns
• Rise/Fall Time: 50ns
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The IR21814 features an 8-pin configuration with the following pin assignments:

1. VCC: Supply voltage input
2. VB: Bootstrap supply voltage input
3. HO: High-side gate driver output
4. LO: Low-side gate driver output
5. COM: Common ground
6. SD: Shutdown input
7. VS: Logic supply voltage input
8. IN: Input control signal

Functional Features

• High-speed switching: The IR21814 offers fast switching times, allowing for efficient control of power electronic devices.
• High-voltage capability: It can handle high voltage levels, making it suitable for applications requiring high power handling.
• Integrated bootstrap diode: The built-in bootstrap diode simplifies the design and reduces external component count.
• Under-voltage lockout (UVLO): The UVLO feature ensures that the gate driver operates within safe voltage limits, enhancing system reliability.
• Short-circuit protection: The IR21814 incorporates protection mechanisms to prevent damage in case of a short circuit.

Advantages and Disadvantages

Advantages: - Fast switching times enable efficient power control - High-voltage capability for demanding applications - Integrated bootstrap diode simplifies design - UVLO and short-circuit protection enhance system reliability

Disadvantages: - Limited operating frequency compared to some other gate driver ICs - Requires careful consideration of thermal management due to high-power operation

Working Principles

The IR21814 operates by receiving an input control signal (IN) and generating corresponding gate drive signals for the high-side (HO) and low-side (LO) outputs. These signals are used to control the conduction and blocking states of MOSFETs or IGBTs in power electronic circuits. The bootstrap supply voltage (VB) is used to provide the necessary gate drive voltage for the high-side output.

Detailed Application Field Plans

The IR21814 finds extensive use in various power electronics applications, including: - Motor drives - Switch-mode power supplies - Inverters - Uninterruptible Power Supplies (UPS) - Solar inverters - Electric vehicle charging systems

Detailed and Complete Alternative Models

• IR2110
• IRS21844
• MCP1407
• MAX4420
• FAN7382

These alternative models offer similar functionality and can be considered as substitutes for the IR21814 based on specific application requirements.

In conclusion, the IR21814 is a high-speed, high-voltage gate driver IC that provides efficient and reliable gate driving for power electronic devices. Its compact package, robust design, and various features make it suitable for a wide range of applications in the field of power electronics.