L6387D

Overview

The L6387D is a high-voltage half-bridge gate driver manufactured using BCD offline technology. It drives power MOSFETs or IGBTs with a floating high-side section supporting voltage rails up to 600 V. The device features independent outputs capable of sourcing 400 mA and sinking 650 mA, with switching times of 50 ns rise and 30 ns fall under a 1 nF load. Logic inputs are CMOS/TTL compatible, and the unit integrates UVLO protection and an internal bootstrap diode in an 8-SOIC package.

Feature Summary

• High-voltage rail capability up to 600 V for driving power switches
• Integrated interlocking function prevents simultaneous output activation
• CMOS/TTL Schmitt trigger inputs ensure noise immunity and easy interfacing
• Internal bootstrap diode simplifies circuit design and reduces component count

Applications

• Brushed DC motor drivers
• AC induction motor control systems
• Power supply switch-mode applications

Procurement Notes

Verify the specific suffix 'D' corresponds to the SOIC-8 tube packaging variant when ordering. Confirm that the required operating temperature range aligns with the standard industrial specifications. Ensure the application voltage does not exceed the 600 V rating for the high-side floating section. Check datasheet details for humidity sensitivity levels and recommended soldering profiles for surface-mount assembly.

Selection Notes

Select this component for designs requiring a compact, single-chip solution for half-bridge topologies. It is suitable where CMOS/TTL logic compatibility is necessary for direct microcontroller interfacing. Consider the integrated bootstrap diode and interlocking features to reduce external component requirements and enhance safety against shoot-through conditions in power switching applications.

Part Context

The L6387D belongs to the L6387E family of high-voltage gate drivers from STMicroelectronics. This series utilizes BCD technology to integrate high-voltage capabilities with low-voltage logic control on a single chip. The family provides robust performance for driving power devices in demanding environments, offering consistent electrical characteristics across different packaging options such as DIP and SOIC.

Replacement Considerations

The L6387ED serves as a tape-and-reel alternative to the tube-packaged L6387D within the same functional family. Verify pinout compatibility and packaging dimensions before substitution. Other variants like the A6387D offer automotive qualification but may differ in specific electrical parameters or packaging styles.