The IRS21271 is a high-voltage, high-speed power MOSFET driver from International Rectifier (now part of Infineon Technologies). It's designed to drive high-side and low-side N-channel MOSFETs or IGBTs in half-bridge configurations. This driver features independent high and low side referenced output channels, enabling efficient control of power switches.

Applications:

• Half-bridge converters
• Motor drives
• HID ballasts
• Class D amplifiers
• Induction heating
• Power supplies
• DC-DC converters

Features:

• Floating channel designed for bootstrap operation: Allows driving of high-side N-channel MOSFETs.
• Gate drive supply range from 10 V to 20 V: Provides flexibility in power supply design.
• Logic input compatible with 3.3 V to 5 V logic: Simplifies interfacing with microcontrollers and other logic devices.
• Undervoltage lockout: Prevents operation when the supply voltage is too low.
• Matched propagation delay for both channels: Ensures accurate switching and reduces dead-time requirements.
• CMOS Schmitt-triggered inputs with pull-down: Improves noise immunity.
• Output driver features high pulse current buffer stage: Minimizes driver impedance.
• RoHS compliant: Meets environmental regulations.

Benefits:

• Simplified High-Side Driving: Bootstrap operation simplifies the design of high-side gate drive circuits.
• Improved Efficiency: Fast switching speeds and low propagation delay reduce switching losses.
• Robust Operation: Undervoltage lockout and matched propagation delay ensure reliable operation.
• Easy to Use: Logic-level inputs and wide supply voltage range simplify integration into various systems.

Additional Details:

The IRS21271 has a typical source and sink current capability of 290mA and 600mA, respectively. It is suitable for driving MOSFETs and IGBTs in a variety of power electronic applications. The floating channel can be used to drive a high-side N-channel MOSFET with a voltage up to 200 V. The undervoltage lockout feature ensures that the driver does not operate when the supply voltage is insufficient, preventing damage to the power switches. The matched propagation delay of the high and low side channels allows for precise control of the switching timing, minimizing dead-time requirements and improving efficiency. The package is a SOIC-8.