STMicroelectronics L6571AD High-Voltage Half-Bridge Driver

The L6571AD from STMicroelectronics is a high-voltage, high-speed power MOSFET and IGBT driver with an integrated bootstrap diode. It is designed to provide efficient driving for half-bridge configurations in a variety of applications, including switch-mode power supplies, motor control systems, and inverter circuits. This driver is particularly well-suited for applications that require high voltage capabilities and robust performance.

Key Features

• High-Voltage Capability: The L6571AD is capable of handling supply voltages up to 600V, making it ideal for driving power switches in high-voltage applications.
• Integrated Bootstrap Diode: This feature simplifies the design and reduces the external component count, which enhances the overall reliability and efficiency of the circuit.
• High-Speed Operation: With its fast propagation delay and high drive current, the L6571AD ensures efficient switching, reducing power losses and improving performance in high-frequency applications.
• Under-Voltage Lockout (UVLO): This protection feature ensures that the driver operates only when the supply voltage is within the specified range, thus preventing malfunction due to insufficient voltage.
• Matched Delay: The device offers matched delays between the low-side and high-side sections, which is critical for maintaining the integrity of the half-bridge operation and preventing shoot-through conditions.
• Thermal Shutdown: The built-in thermal shutdown feature provides additional protection by turning off the device if the junction temperature exceeds safe operating limits.

Applications

The L6571AD is versatile and can be used in a wide range of applications. Some of the common applications include:

• Switch-mode power supplies (SMPS)
• DC to AC inverters
• Brushless DC motor drives
• AC motor variable speed drives
• Resonant converters

With its robust design and advanced features, the L6571AD from STMicroelectronics is a reliable choice for designers looking to implement a high-voltage half-bridge driver in their systems. Its performance and built-in protections ensure that it can meet the demands of a variety of high-voltage applications.