L6387ED

Overview

The L6387ED is a high-voltage half-bridge gate driver manufactured using BCD offline technology. It features two independent drivers capable of sourcing 400 mA and sinking 650 mA, supporting voltage rails up to 600 V. The device includes an integrated interlocking function to prevent simultaneous output activation. Logic inputs are CMOS/TTL compatible, and it incorporates UVLO protection with an internal bootstrap diode. Switching times are 50 ns rise and 30 ns fall with a 1 nF load. Operating temperature ranges from -45 °C to +125 °C.

Feature Summary

• Integrated interlocking function prevents simultaneous high-side and low-side drive activation
• High dV/dt immunity rated at ±50 V/ns across the full temperature range
• Internal bootstrap diode eliminates external component requirement for high-side biasing
• CMOS and TTL Schmitt trigger inputs provide hysteresis and pull-down stability

Applications

• Driving N-channel power MOSFETs in half-bridge configurations
• Driving IGBT devices in high-voltage power stages
• Offline power supply applications requiring compact layout
• Automotive motor control systems

Procurement Notes

Verify the specific suffix 'ED' indicates the SOIC-8 tube packaging variant distinct from tape-and-reel options. Confirm that the logic input voltage levels align with the controlling microcontroller or Hall-effect interface requirements. Ensure the application circuit accommodates the 600 V floating rail capability and utilizes appropriate decoupling capacitors near the VCC pins to maintain UVLO integrity during transient events.

Selection Notes

Select this component when anti-cross-conduction protection is mandatory via hardware interlocking rather than software dead-time management. Choose this part over non-interlocked variants like the L6386AD if driving symmetrical half-bridges where simultaneous high-side and low-side conduction must be physically prevented. Verify that the 650 mA sink current meets the gate charge requirements of the target power switches within the specified switching time constraints.

Part Context

The L6387ED belongs to the L638xE series of high-voltage gate drivers designed for robust industrial and automotive environments. Unlike the L6386AD which allows simultaneous drive, the L6387E family specifically enforces an interlocking mechanism. This distinguishes it from other half-bridge drivers by prioritizing fail-safe operation against shoot-through currents in standard symmetrical bridge topologies.

Replacement Considerations

• L6387ED013TR (Tape and Reel version)
• L6387D (SOIC-8 Tube version)

FAQ

Can the L6387ED drive both high-side and low-side outputs simultaneously?

No, the device integrates an interlocking function that prevents both outputs from being driven high at the same time.

What is the maximum voltage rating for the high-side floating section?

The high-side section is designed to operate with a voltage rail up to 600 V.