The IRS21864S is a high voltage, high speed power MOSFET and IGBT driver with a floating channel designed for bootstrap operation. Manufactured by International Rectifier (now Infineon Technologies), this driver IC is commonly used in motor control, power supplies, and other applications requiring efficient and reliable switching of power devices. It features advanced protection and control functions.

Applications

• Motor Control: Used to drive MOSFETs and IGBTs in motor control circuits for appliances, power tools, and industrial automation.
• Power Supplies: Employed in half-bridge and full-bridge power supplies for computers, servers, and telecommunications equipment.
• Inverters: Drives the power switches in DC-AC inverters for solar power, UPS systems, and renewable energy applications.
• Lighting Ballasts: Controls the MOSFETs in electronic ballasts for fluorescent and LED lighting systems.
• Audio Amplifiers: Used in Class D audio amplifiers to drive the output stage MOSFETs.

Features

• Floating Channel Designed for Bootstrap Operation: Simplifies the gate drive circuitry and reduces external component count.
• High-Side and Low-Side Driver: Drives both the high-side and low-side switches in a half-bridge configuration.
• Under-Voltage Lockout (UVLO): Prevents the MOSFETs and IGBTs from operating under insufficient gate voltage, protecting them from damage.
• Matched Propagation Delay for Both Channels: Ensures symmetrical switching and minimizes dead-time losses.
• Logic Input Compatible: Accepts logic-level signals for easy interfacing with microcontrollers and other control circuits.

Benefits

• Simplified Circuit Design: Reduces the complexity of gate drive circuits, saving space, cost, and design effort.
• Improved Efficiency: Minimizes switching losses and optimizes system efficiency through matched propagation delays.
• Enhanced Reliability: Protects the MOSFETs and IGBTs from damage due to undervoltage conditions.
• Easy Integration: Compatible with a wide range of control circuits and power devices.
• Versatile Applications: Suitable for diverse power electronics applications requiring efficient and reliable switching.

Technical Specifications

The IRS21864S typically operates with a supply voltage range of 10V to 20V. The output current capability is designed to drive a wide range of MOSFETs and IGBTs, ensuring compatibility with various power levels. The UVLO threshold is set to protect the power devices from undervoltage conditions. The input impedance is designed to be compatible with logic-level signals, allowing for easy integration with control systems. The IC is available in a surface-mount package for compact and efficient board layouts. The operating temperature range is typically specified for industrial applications, ensuring reliable operation in harsh environments. The propagation delay is minimized to enable high-speed switching performance.