IR21844STRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: The IR21844STRPBF is a high voltage, high-speed power MOSFET and IGBT driver. It is specifically designed to drive both the high-side and low-side MOSFETs or IGBTs in half-bridge or full-bridge configurations.

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

Package: SOIC-8 (Small Outline Integrated Circuit)

Essence: The IR21844STRPBF is an essential component in power electronics applications where efficient and reliable switching of MOSFETs or IGBTs is required.

Packaging/Quantity: The IR21844STRPBF is typically sold in reels containing 2500 units per reel.

Specifications

• Supply Voltage: 10V - 20V
• Output Current: ±200mA
• Operating Temperature Range: -40°C to +125°C
• Maximum Junction Temperature: +150°C
• Input Logic Thresholds: VIL = 0.8V, VIH = 2.4V
• Output Voltage Swing: 10V - 20V
• Propagation Delay: 120ns (typical)
• Rise/Fall Time: 55ns (typical)
• Undervoltage Lockout (UVLO) Protection

Detailed Pin Configuration

The IR21844STRPBF features an 8-pin Small Outline Integrated Circuit (SOIC) package with the following pin configuration:

1. VB (Bootstrap Supply Voltage)
2. HO (High-Side Gate Driver Output)
3. VS (High-Side Floating Supply Voltage)
4. COM (Common)
5. LO (Low-Side Gate Driver Output)
6. GND (Ground)
7. LIN (Logic Input)
8. VCC (Logic Supply Voltage)

Functional Features

• High voltage level shifting
• Undervoltage lockout protection
• Shoot-through prevention logic
• Integrated bootstrap diode
• Short circuit protection
• Fault status indication

Advantages and Disadvantages

Advantages: - High voltage capability allows for driving power MOSFETs and IGBTs in various applications - Fast switching speed enables efficient power conversion - Integrated features provide protection and fault monitoring - 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 - Not suitable for low voltage applications

Working Principles

The IR21844STRPBF operates by receiving logic input signals through the LIN pin, which controls the gate driver outputs HO and LO. The high-side gate driver output (HO) is responsible for driving the high-side MOSFET or IGBT, while the low-side gate driver output (LO) drives the corresponding low-side device. The bootstrap supply voltage (VB) powers the high-side gate driver, utilizing an integrated bootstrap diode.

When the LIN input signal transitions from low to high, the high-side gate driver turns on, allowing current to flow through the high-side device. Conversely, when the LIN input signal transitions from high to low, the high-side gate driver turns off, preventing current flow.

The IR21844STRPBF incorporates various protection features such as undervoltage lockout (UVLO), shoot-through prevention logic, and short circuit protection, ensuring safe and reliable operation of the power MOSFETs or IGBTs.

Detailed Application Field Plans

The IR21844STRPBF is widely used in various applications, including:

1. Motor control systems
2. Switch-mode power supplies
3. Inverters and converters
4. Uninterruptible power supplies (UPS)
5. Solar inverters
6. Electric vehicle charging systems

Detailed and Complete Alternative Models

1. IR21844S: Similar to IR21844STRPBF, but with a different package (DIP-8).
2. IRS21844SPBF: Improved version with higher output current capability.
3. IR2110: Half-bridge driver with additional features such as independent inputs for high-side and low-side devices.

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

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