STMicroelectronics

L6385D

L6385D Description

The L6385D from STMicroelectronics is a high-voltage, half-bridge gate driver IC designed for robust power switching applications. Operating with a maximum supply voltage of 17V and capable of driving 600V bootstrap high-side configurations, it is optimized for efficiency and reliability in demanding environments. The device features two independent channels with inverting logic inputs, supporting peak output currents of 400mA (source) and 650mA (sink). With fast switching characteristics (50ns rise, 30ns fall times), it minimizes power losses in high-frequency circuits. Although now obsolete, it remains a viable choice for legacy designs requiring high-performance gate driving.

L6385D Features

• High-Side Voltage Capability: Supports up to 600V bootstrap operation, ideal for half-bridge topologies.
• Fast Switching: 50ns rise / 30ns fall times ensure efficient high-frequency operation.
• Robust Drive Strength: 400mA source / 650mA sink current for reliable MOSFET/IGBT control.
• Logic Compatibility: 1.5V (VIL) / 3.6V (VIH) thresholds for broad microcontroller interfacing.
• Compact & Reliable: 8SO surface-mount package, MSL 1 (unlimited) moisture sensitivity, and ROHS3 compliance for environmental safety.
• Independent Channels: Flexible control for half-bridge or dual low-side configurations.

L6385D Applications

• Motor Drives: Efficient control of brushless DC (BLDC) or stepper motors in industrial systems.
• Switched-Mode Power Supplies (SMPS): High-voltage half-bridge topologies in AC-DC converters.
• Lighting Systems: Driving power stages in LED drivers or HID ballasts.
• Renewable Energy: Inverter gate driving for solar/wind power applications.
• Legacy Industrial Equipment: Replacement or maintenance of older high-voltage designs.

Conclusion of L6385D

The L6385D excels in high-voltage, high-speed switching applications, offering a balance of performance, reliability, and flexibility. While obsolete, its 600V bootstrap capability, fast switching, and strong drive current make it suitable for legacy motor drives, power supplies, and renewable energy systems. Engineers seeking a proven solution for half-bridge designs may still find value in existing stock or alternative STMicroelectronics successors.