STMicroelectronics

L6385E

L6385E Description

The L6385E from STMicroelectronics is a high-voltage, half-bridge gate driver IC designed for robust power switching applications. Housed in an 8-pin DIP (Through Hole) package, this obsolete but reliable driver operates with a maximum supply voltage of 17V and supports bootstrap voltages up to 600V, making it suitable for high-side switching in demanding environments. It features two independent channels with inverting logic inputs, ensuring precise control over power MOSFETs or IGBTs. With fast switching characteristics (rise/fall times of 50ns and 30ns, respectively) and high peak output current (400mA source, 650mA sink), the L6385E minimizes switching losses and enhances efficiency in power conversion systems.

L6385E Features

• High-Side Voltage Capability: Supports bootstrap operation up to 600V, ideal for high-voltage applications.
• Fast Switching Performance: 50ns rise time and 30ns fall time reduce power dissipation and improve efficiency.
• Robust Output Drive: Delivers 400mA source / 650mA sink peak current for quick MOSFET/IGBT switching.
• Wide Logic Compatibility: 1.5V (VIL) to 3.6V (VIH) input thresholds ensure compatibility with various control circuits.
• Reliable Construction: ROHS3 Compliant and REACH Unaffected, meeting environmental and safety standards.
• Independent Channels: Enables flexible half-bridge or low-side driver configurations.

L6385E Applications

The L6385E excels in high-voltage, high-frequency power systems, including:

• Switch-Mode Power Supplies (SMPS): Enhances efficiency in AC-DC and DC-DC converters.
• Motor Drives: Provides precise gate driving for brushless DC (BLDC) and stepper motor controllers.
• Lighting Systems: Used in electronic ballasts and LED drivers for robust switching.
• Industrial Inverters: Supports high-power IGBT/MOSFET driving in renewable energy and UPS systems.

Conclusion of L6385E

Though marked obsolete, the L6385E remains a high-performance choice for engineers needing a high-voltage gate driver with fast switching and strong output drive. Its 600V bootstrap capability, independent channels, and compatibility with low-voltage logic make it versatile for legacy designs in power electronics. For applications demanding reliability under high stress, the L6385E offers a proven solution despite newer alternatives in the market.