IRS21271PBF

Product Overview

Category: Integrated Circuit (IC)

Use: The IRS21271PBF is a high-performance half-bridge gate driver IC designed for use in various power applications, such as motor drives, switch-mode power supplies, and inverters. It provides the necessary drive signals for controlling the high-side and low-side MOSFETs in a half-bridge configuration.

Characteristics: - High voltage level shifting capability - Low propagation delay and rise/fall times - Protection features against overcurrent and overtemperature conditions - Wide operating voltage range - Compact and lightweight design

Package: The IRS21271PBF is available in a compact and industry-standard 8-pin SOIC (Small Outline Integrated Circuit) package. This package offers excellent thermal performance and ease of integration into different circuit designs.

Essence: The essence of the IRS21271PBF lies in its ability to efficiently drive high-power MOSFETs in half-bridge configurations, enabling precise control and reliable operation of power electronic systems.

Packaging/Quantity: The IRS21271PBF is typically sold in reels or tubes containing a quantity of 250 units per package.

Specifications

• Supply Voltage Range: 10V to 20V
• Output Current: ±2A
• Operating Temperature Range: -40°C to 125°C
• Input Logic Thresholds: CMOS/TTL compatible
• Undervoltage Lockout (UVLO) Protection
• Deadtime Control for Shoot-Through Prevention

Detailed Pin Configuration

The IRS21271PBF features the following pin configuration:

1. VCC: Power supply input for the IC.
2. VB: Bootstrap supply voltage for the high-side gate driver.
3. HO: High-side gate driver output.
4. LO: Low-side gate driver output.
5. COM: Common ground reference for the IC.
6. LIN: Logic input for controlling the low-side gate driver.
7. SD: Shutdown input for disabling the IC.
8. VSS: Ground reference for the IC.

Functional Features

• High voltage level shifting: Enables efficient drive of high-side MOSFETs.
• UVLO protection: Prevents improper operation during low supply voltage conditions.
• Deadtime control: Ensures proper timing between high-side and low-side switching to avoid shoot-through current.
• Overcurrent and overtemperature protection: Safeguards against excessive current or temperature conditions, enhancing system reliability.
• Fast propagation delay and rise/fall times: Allows for precise control and high-frequency operation.

Advantages and Disadvantages

Advantages: - High-performance gate driver for power applications - Wide operating voltage range - Compact and lightweight design - Protection features enhance system reliability - Fast switching characteristics enable high-frequency operation

Disadvantages: - Limited output current capability (±2A) - Requires external bootstrap capacitor for high-side gate driver operation

Working Principles

The IRS21271PBF operates by receiving logic input signals through the LIN pin, which controls the low-side gate driver. The high-side gate driver is powered by a bootstrap supply voltage (VB) derived from the VCC pin. The IC generates complementary drive signals at the HO and LO pins, which are used to control the high-side and low-side MOSFETs in a half-bridge configuration. By properly timing the drive signals and utilizing deadtime control, the IRS21271PBF ensures efficient and reliable switching of the power devices.

Detailed Application Field Plans

The IRS21271PBF finds extensive application in various power electronic systems, including: 1. Motor drives: Enables precise control of motor speed and torque in electric vehicles, industrial machinery, and robotics. 2. Switch-mode power supplies: Facilitates efficient conversion of electrical energy in applications such as computer power supplies, LED drivers, and telecom equipment. 3. Inverters: Enables the conversion of DC power to AC power in renewable energy systems, uninterruptible power supplies (UPS), and solar inverters.

Detailed and Complete Alternative Models

1. IRS2121PBF: Similar to IRS21271PBF but with a single high-side gate driver output.
2. IRS21844PBF: Dual half-bridge gate driver IC with integrated bootstrap diodes and higher output current capability.
3. IRS2336SPBF: Three-phase gate driver IC for motor control applications.

These alternative models offer different features and specifications, providing flexibility for various application requirements.

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