STMicroelectronics L6398D High-Voltage Half-Bridge Driver

The L6398D from STMicroelectronics is a high-voltage, high-speed, half-bridge driver specifically engineered to drive N-channel power MOSFETs or IGBTs. This advanced driver is a perfect choice for a wide range of applications, including switch-mode power supplies, motor drivers, and high-efficiency converters, where reliable and efficient high-voltage switching is critical.

Key Features

• High-Voltage Capability: The L6398D can handle high voltages, with a bootstrap diode integrated for the high-side gate-drive bootstrap capacitor, enabling the direct driving of the gate of the high-side power transistor.
• Advanced Driving Stages: It features a dual independent low and high-side driver with a 290 mA and 600 mA sink and source current capability, respectively, ensuring robust and efficient driving of power switches.
• Interlocking Function: An interlocking function prevents the high-side and low-side MOSFETs or IGBTs from conducting simultaneously, thus eliminating the risk of shoot-through.
• Under-Voltage Lockout (UVLO): Both the high-side and low-side sections have UVLO to ensure the device operates only when the supply voltage is adequate, enhancing system safety and reliability.
• Matched Delay: Propagation delays are matched between the high-side and low-side drivers to simplify the design of high-frequency circuits.
• CMOS/TTL Inputs: The L6398D is compatible with a wide range of control input signals, thanks to its CMOS and TTL compatible inputs.

Applications

The versatility of the L6398D makes it ideal for an array of high-voltage applications. It is commonly used in motor control circuits, including AC induction, brushed DC, brushless DC, and stepper motors. Furthermore, it is well-suited for power converters such as synchronous and resonant converters, as well as for lighting systems and welding equipment.

Conclusion

With its robust feature set and high-voltage operation, the STMicroelectronics L6398D is an excellent choice for designers looking to optimize their power management and motor control solutions. Its integrated features and protections ensure high performance and reliability, making it a go-to driver for a wide range of industrial and consumer applications.