The IR2118S is a high voltage, high speed power MOSFET and IGBT driver from International Rectifier (now Infineon Technologies). It is specifically designed for driving power devices in applications such as motor control, power supplies, and lighting. The device features floating channel bootstrap driver designed for gate driving N-Channel MOSFETs operating up to 600 V.

Applications:

• Motor Control: Used in motor drives for industrial automation, robotics, and electric vehicles.
• Power Supplies: Implemented in switched-mode power supplies (SMPS) for computers, servers, and other electronic equipment.
• Lighting Ballasts: Employed in electronic ballasts for fluorescent and LED lighting.
• Induction Heating: Used in induction heating systems for industrial and consumer applications.
• Welding Equipment: Integrated into welding machines for controlling the power devices.

Features:

• Floating Channel Designed for Bootstrap Operation: Allows for high-side gate drive without requiring a separate isolated power supply.
• Gate Drive Supply Range from 10V to 20V: Provides flexibility in selecting the gate drive voltage.
• Logic Input Compatible with 3.3V and 5V Logic: Simplifies interfacing with microcontrollers and other digital circuits.
• Undervoltage Lockout (UVLO): Prevents the MOSFET or IGBT from operating with insufficient gate drive voltage.
• Matched Propagation Delay for Both Channels: Ensures symmetrical switching performance.
• High-Side Output Drives up to 600V: Capable of driving high voltage MOSFETs and IGBTs.

Benefits:

• Simplified High-Side Gate Drive: Bootstrap operation eliminates the need for an isolated power supply, reducing cost and complexity.
• Improved System Efficiency: Optimized gate drive characteristics minimize switching losses in the power devices.
• Enhanced System Reliability: Built-in protection features prevent damage from undervoltage conditions.
• Flexible Design: Wide gate drive supply range and logic compatibility provide flexibility in system design.
• Reduced Component Count: Integrated driver reduces the number of external components required.

Additional Details:

The IR2118S is available in an SOIC package. It features a typical propagation delay of less than 100 ns. The device is designed to operate in harsh environments and is capable of withstanding high dv/dt levels.

The IR2118S also includes an enable input for disabling the driver. The high-side and low-side outputs are independently controllable.