L6388E

Overview

The L6388E is a high-voltage half-bridge gate driver manufactured using BCD offline technology. It supports voltage rails up to 600 V with dV/dt immunity of ±50 V/nsec across the full temperature range. The device provides a source current capability of 400 mA and a sink current of 650 mA. Switching times are specified as 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. An internal bootstrap diode is integrated to simplify circuit design.

Feature Summary

• Integrated interlocking function prevents simultaneous driving of both outputs high
• Built-in deadtime function further prevents cross-conduction in power switches
• Internal bootstrap diode eliminates external component requirements for high-side drive
• UVLO protection on both supply voltages ensures operation against line drops

Applications

• Driving N-channel power MOSFETs in half-bridge configurations
• Driving IGBT devices in high-voltage power stages
• Offline power supply designs requiring isolated high-side control
• Motor control applications utilizing floating high-side drivers

Procurement Notes

Verify package availability as the L6388E may be discontinued or superseded by variants like L6388ED. Confirm RoHS compliance status and specific ordering suffixes for tape-and-reel versus tube packaging. Cross-reference datasheet revisions to ensure parameter consistency with current production batches.

Selection Notes

Select this component when a single-chip solution for high-side and low-side driving is required without external bootstrap diodes. Ensure the application voltage does not exceed the 600 V rail limit. Verify that the logic interface matches the available 3.3 V, 5 V, or 15 V input options. Consider thermal dissipation limits if operating near maximum current capabilities.

Part Context

The L6388E belongs to the L638xE series of high-voltage gate drivers from STMicroelectronics. This family utilizes BCD technology to integrate high-voltage components with standard logic circuits. The series includes various pinout options such as DIP-8, SO-8, DIP-14, and SO-14 packages to accommodate different board space and isolation requirements.

Replacement Considerations

L6388ED serves as a direct surface-mount alternative within the same functional family.