IR21531STRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: The IR21531STRPBF is a high-voltage, half-bridge gate driver IC designed for use in power electronics applications. It provides the necessary drive signals for controlling the high-side and low-side MOSFETs in a half-bridge configuration.

Characteristics: - High voltage capability - Fast switching speed - Low power consumption - Protection features (overcurrent, undervoltage, overtemperature) - High noise immunity

Package: The IR21531STRPBF is available in a small outline package (SOP) with 16 pins.

Essence: This IC plays a crucial role in driving the power switches in a half-bridge topology, enabling efficient control of power flow in various applications.

Packaging/Quantity: The IR21531STRPBF is typically sold in reels or tubes, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 10V to 20V
• Output Current: 200mA
• Operating Temperature Range: -40°C to 125°C
• Propagation Delay Time: 150ns
• Rise/Fall Time: 50ns
• Maximum Duty Cycle: 50%

Pin Configuration

The IR21531STRPBF has 16 pins arranged as follows:

1. VCC - Power supply voltage input
2. VB - Bootstrap supply voltage input
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 capacitor and high-side gate driver
7. SD - Shutdown input
8. RT - Oscillator timing resistor
9. CT - Oscillator timing capacitor
10. OSC - Oscillator output
11. VREF - Reference voltage input
12. FB - Feedback input
13. CS - Current sense input
14. SD/UVLO - Shutdown/Undervoltage lockout input
15. GND - Ground connection
16. HO - High-side gate driver output

Functional Features

• Integrated high-voltage level shifting
• Adaptive shoot-through protection
• Programmable oscillator frequency
• Adjustable dead time control
• Overcurrent protection
• Undervoltage lockout (UVLO) protection
• Shutdown mode for power saving

Advantages and Disadvantages

Advantages: - High voltage capability allows for use in a wide range of applications - Fast switching speed improves overall system efficiency - Low power consumption reduces energy losses - Protection features enhance system reliability - High noise immunity ensures stable operation in noisy environments

Disadvantages: - Limited maximum duty cycle may restrict certain applications - Requires external components for proper operation - Sensitivity to electromagnetic interference (EMI) may require additional shielding measures

Working Principles

The IR21531STRPBF operates by generating complementary drive signals for the high-side and low-side MOSFETs in a half-bridge configuration. It utilizes an internal oscillator to control the timing of the drive signals, allowing for precise switching of the power switches. The adaptive shoot-through protection prevents both MOSFETs from conducting simultaneously, avoiding short circuits.

Detailed Application Field Plans

The IR21531STRPBF is commonly used in various power electronics applications, including: - Switch-mode power supplies - Motor drives - Inverters - Uninterruptible power supplies (UPS) - Solar inverters - LED lighting systems

Alternative Models

For those seeking alternative options, the following ICs can be considered: - IR2155 - IRS21844 - FAN7382 - HIP4081A

These alternatives offer similar functionalities and can be used as substitutes for the IR21531STRPBF in various applications.

In conclusion, the IR21531STRPBF is a high-voltage, half-bridge gate driver IC with fast switching speed, low power consumption, and protection features. Its versatile nature makes it suitable for a wide range of power electronics applications. However, it has limitations in terms of maximum duty cycle and sensitivity to EMI. Alternative models such as IR2155, IRS21844, FAN7382, and HIP4081A can be considered as replacements.