The IRS21856SPBF is a high-voltage, high-speed power MOSFET and IGBT gate driver from Infineon Technologies. It is designed for applications requiring robust gate driving capabilities, particularly in environments with high voltage and noise. This driver features a floating channel designed for bootstrap operation, enabling the driving of N-channel MOSFETs and IGBTs in half-bridge configurations. Its advanced level-shift circuit allows high-side gate driver operation up to 600V. The logic input is compatible with standard CMOS or LSTTL outputs, even down to 3.3V logic. The driver incorporates under-voltage lockout (UVLO) protection to prevent MOSFETs or IGBTs from operating in a linear region during start-up or low supply voltage conditions, ensuring reliable system operation.

Applications

• Half-bridge and full-bridge converters
• Motor drives
• Induction heating systems
• Lighting ballasts
• Power supplies

Features

• Floating channel designed for bootstrap operation
• High-side driver fully operational to +600V
• Tolerant to negative transient voltage, dV/dt immune
• Gate drive supply range from 10V to 20V
• Under-voltage lockout for both channels
• CMOS Schmitt-triggered inputs with pull-down
• Matched propagation delay for both channels
• Output driver features high pulse current buffer stage

Benefits

• Simplified half-bridge/full-bridge design
• Increased system reliability due to UVLO protection
• Improved noise immunity
• Optimized dead-time control
• Enhanced efficiency in power conversion systems

Additional Details

The IRS21856SPBF is offered in a DIP-8 or SO-8 package. It is designed to drive MOSFETs and IGBTs with typical gate charges up to several nanocoulombs. The internal dead-time is typically around 360ns. The operating temperature range is -40°C to +125°C. The device uses advanced process techniques to achieve robust monolithic construction. The matched propagation delay of the high and low-side drivers minimizes dead-time requirements, further enhancing system efficiency. Its high dV/dt immunity makes it suitable for noisy switching environments.