IR4427STR

Product Overview

Category: Integrated Circuit (IC)

Use: The IR4427STR is a high-speed, low-side gate driver IC designed for use in various applications that require efficient switching of power MOSFETs and IGBTs. It provides a reliable and robust solution for driving these devices in a wide range of industrial and automotive applications.

Characteristics: - High-speed switching capability - Low power consumption - Wide operating voltage range - Built-in protection features - Compact and space-saving package

Package: The IR4427STR is available in a small outline integrated circuit (SOIC) package. This package offers excellent thermal performance and ease of handling during assembly.

Essence: The essence of the IR4427STR lies in its ability to provide efficient and reliable gate drive signals to power MOSFETs and IGBTs, enabling them to switch on and off rapidly, thus controlling the flow of current in various electronic circuits.

Packaging/Quantity: The IR4427STR is typically sold in reels or tubes, with each reel or tube containing a specific quantity of ICs. The exact packaging and quantity may vary depending on the manufacturer and distributor.

Specifications

• Supply Voltage Range: 4.5V to 20V
• Output Current: 1.5A (peak)
• Propagation Delay Time: 75ns (typical)
• Rise/Fall Time: 25ns (typical)
• Operating Temperature Range: -40°C to +125°C
• Input Logic Compatibility: CMOS/TTL

Pin Configuration

The IR4427STR features an 8-pin SOIC package with the following pin configuration:

1. VCC - Power supply voltage input
2. IN - Logic input for controlling the gate driver
3. GND - Ground reference
4. LO - Low-side gate driver output
5. COM - Common connection for the low-side driver and bootstrap capacitor
6. HO - High-side gate driver output
7. VB - Bootstrap supply voltage input
8. VS - High-side floating supply voltage input

Functional Features

• High-speed switching: The IR4427STR is capable of driving power MOSFETs and IGBTs at high frequencies, allowing for efficient power conversion and control.
• Integrated protection features: The IC incorporates various protection mechanisms such as under-voltage lockout (UVLO), over-current protection (OCP), and thermal shutdown to ensure safe operation and prevent device damage.
• Bootstrap operation: The bootstrap circuitry allows the high-side gate driver to operate efficiently without requiring an additional isolated power supply.
• Logic level input compatibility: The IC can be easily interfaced with standard CMOS or TTL logic circuits, making it versatile and compatible with a wide range of control systems.

Advantages and Disadvantages

Advantages: - High-speed switching capability enables efficient power conversion. - Integrated protection features enhance system reliability. - Compact package size saves board space. - Wide operating voltage range provides flexibility in various applications.

Disadvantages: - Limited output current may not be suitable for high-power applications. - Requires external bootstrap capacitor for high-side gate driver operation.

Working Principles

The IR4427STR operates by receiving a logic-level input signal (IN) that controls the gate driver outputs (LO and HO). When the input signal is high, the corresponding output turns on, providing a gate voltage to the connected power MOSFET or IGBT. Conversely, when the input signal is low, the output turns off, effectively turning off the connected device.

The bootstrap circuitry ensures efficient operation of the high-side gate driver by utilizing the voltage across the bootstrap capacitor (VB) to generate the necessary gate drive voltage.

Detailed Application Field Plans

The IR4427STR finds applications in various fields, including but not limited to: - Motor control systems - Switch-mode power supplies - Inverters and converters - Automotive electronics - Industrial automation

In motor control systems, the IC can be used to drive MOSFETs or IGBTs in brushless DC (BLDC) motors, stepper motors, and servo motors. It enables precise control of motor speed and direction.

In switch-mode power supplies, the IC facilitates efficient switching of power devices, resulting in higher power conversion efficiency and reduced energy losses.

In automotive electronics, the IC is employed in applications such as electronic fuel injection systems, electric power steering, and battery management systems, where it ensures reliable and efficient operation.

In industrial automation, the IC is utilized in various control circuits, including motor drives, robotics, and process control systems, providing accurate and responsive control signals.

Detailed and Complete Alternative Models

• IR2110: High-voltage, high-speed gate driver IC with similar features and functionality.
• IRS21844: Half-bridge gate driver IC with integrated protection features and wide