L6388

Overview

The L6388 is a high-voltage half-bridge gate driver manufactured using BCD offline technology, designed to drive power MOSFETs and IGBTs. It supports a floating high-side voltage rail up to 600 V with dV/dt immunity of ±50 V/nsec across the full temperature range. The device provides a peak output current capability of 400 mA source and 650 mA sink. Switching times are specified at 70 ns rise and 40 ns fall with a 1 nF load. Logic inputs are compatible with 3.3 V, 5 V, and 15 V CMOS/TTL standards. It includes an internal bootstrap diode, deadtime function, and interlocking protection against cross-conduction.

Feature Summary

• High-voltage operation supporting a 600 V floating rail for driving high-side power devices
• Integrated interlocking and deadtime functions prevent simultaneous output activation and cross-conduction
• Built-in bootstrap diode eliminates external component requirements for high-side supply generation
• CMOS and TTL input compatibility ensures direct interfacing with standard control logic

Applications

• Driving half-bridge configurations of power MOSFETs and IGBTs in offline power supplies
• Industrial motor control systems requiring high-voltage isolation and robust switching
• Inverter circuits in renewable energy conversion applications

Procurement Notes

Verify that the specific package variant matches the design requirements, as the L6388 family includes both DIP-8 and SO-8 options. Confirm availability status, as some variants may be discontinued or obsolete. Ensure the selected part number aligns with the required lead time and packaging format for production integration.

Selection Notes

Select this component when a reliable solution for driving high-side switches in isolated environments is required. The integrated bootstrap diode simplifies the bill of materials compared to discrete solutions. Verify that the 600 V rating meets the system's bus voltage requirements and that the 400 mA/650 mA drive current is sufficient for the target power device gate capacitance.

Part Context

The L6388 belongs to the L6388E series of high-voltage gate drivers from STMicroelectronics. It utilizes BCD technology to integrate high-voltage components with low-voltage logic on a single chip. This series is designed for robust performance in demanding industrial and automotive power electronics applications where electrical isolation and high dv/dt immunity are critical.

Replacement Considerations

The L6388ED is listed as a similar alternative within the same product family.