The TDA21473 is a high-current, single-channel gate driver IC from Infineon Technologies, specifically designed for driving MOSFETs in high-power applications. It provides robust and efficient gate driving for various power electronic systems.

Applications:

• Synchronous Rectification: Driving MOSFETs in synchronous rectifier circuits to improve efficiency in power supplies.
• DC-DC Converters: Controlling power MOSFETs in step-up, step-down, and other DC-DC converter topologies.
• Motor Drives: Driving power MOSFETs in motor control applications.
• Inverters: Driving MOSFETs in inverter circuits for solar power, UPS systems, and motor drives.
• High-Power Amplifiers: Driving MOSFETs in audio or RF power amplifiers.

Features:

• High Current Drive Capability: Provides sufficient gate drive current for fast switching of large power MOSFETs.
• Under-Voltage Lockout (UVLO): Protects the MOSFET by preventing operation when the supply voltage is too low.
• Over-Temperature Protection (OTP): Shuts down the driver to prevent damage from excessive temperature.
• Programmable Dead Time: Allows adjustment of the dead time to optimize efficiency and prevent shoot-through.
• Enable/Disable Control: Provides a logic input to enable or disable the gate driver.
• Fast Propagation Delay: Minimizes delay between the input signal and the output gate drive signal.

Benefits:

• Improved Efficiency: Fast switching and optimized dead time reduce switching losses in power MOSFETs.
• Enhanced Reliability: UVLO and OTP protect the MOSFET and the gate driver from damage.
• Simplified Design: Integrated features reduce the number of external components required.
• Flexible Control: Programmable dead time and enable/disable control allow for optimization in different applications.
• Robust Performance: Designed for reliable operation in harsh environments.

Additional Details:

The TDA21473 typically operates with a supply voltage in the range of 4.5V to 16V. The peak output current is designed to drive large MOSFETs with fast switching speeds. The device features thermal protection to prevent damage from overheating. It is available in various package options suitable for surface mount or through-hole mounting. The input signal is typically a PWM (Pulse Width Modulation) signal from a controller IC. The output signal drives the gate of the power MOSFET.