The IR21368S is a high-voltage, high-speed power MOSFET and IGBT driver with three independent high and low side referenced output channels manufactured by International Rectifier (now Infineon Technologies). Designed for 3-phase applications, it features integrated bootstrap functionality and protection features, making it suitable for motor drives, power supplies, and other power conversion systems.

Applications:

• 3-phase motor drives: Drives MOSFETs or IGBTs in variable-speed motor control applications.
• Uninterruptible power supplies (UPS): Controls power switching in UPS systems.
• Welding equipment: Drives the power devices in welding inverters.
• Induction heating: Used in induction heating systems for controlling the power devices.
• Power factor correction (PFC): Controls switches in PFC circuits to improve power quality.

Features:

• Floating channel designed for bootstrap operation: Simplifies high-side gate drive implementation.
• Tolerant to negative transient voltage: Provides robust operation in noisy environments.
• Gate drive supply range: Operates over a wide voltage range to accommodate different power device requirements.
• Undervoltage lockout for all channels: Prevents malfunction when the supply voltage is too low.
• Cross-conduction prevention logic: Prevents shoot-through in the power stage.
• Matched propagation delay for all channels: Ensures accurate timing control.

Benefits:

• Simplified design: Integrated functions reduce external component count.
• Improved efficiency: Optimized gate drive reduces switching losses.
• Enhanced system reliability: Protection features prevent damage to power devices.
• Precise control: Accurate timing and matched propagation delays enable precise control of the power stage.
• Robust operation: Tolerant to noisy environments and voltage transients.

Additional Details:

The IR21368S requires external bootstrap capacitors for the high-side gate drives. The datasheet specifies the recommended values for these capacitors, as well as other external components. Proper PCB layout is crucial for minimizing noise and ensuring stable operation. The device's dead-time setting is important to prevent shoot-through. Consult the Infineon Technologies datasheet for detailed specifications, application notes, and layout recommendations. This driver provides a comprehensive and reliable solution for driving power MOSFETs and IGBTs in demanding applications.