L6386AD

Overview

The L6386AD is a high-voltage half-bridge gate driver manufactured using BCD offline technology. It simultaneously drives one high-side and one low-side power MOSFET or IGBT device, supporting a floating high-side rail up to 600 V. The outputs independently source 400 mA and sink 650 mA, with typical rise and fall times of 50 ns and 30 ns respectively under a 1 nF load. Logic inputs are CMOS/TTL compatible, operating within a supply voltage range of -300 mV to 17 V. The device operates across a temperature range of -45°C to +125°C and features undervoltage lockout on both supply sections.

Feature Summary

• Integrates an inverting comparator referenced to 0.5 V for overcurrent fault protection and diagnostic signaling via the DIAG pin.
• Includes an internal bootstrap diode to simplify circuit design and reduce external component count.
• Features dV/dt immunity of ±50 V/nsec across the full temperature range to ensure stable operation in high-noise environments.

Applications

• Vector motor drive systems
• Asymmetrical half-bridge configurations
• Industrial motor control applications

Procurement Notes

Verify the specific ordering suffix when purchasing. Standard tubes contain 1000 units, while tape and reel options may vary. Confirm RoHS compliance status through official documentation. Ensure the selected package matches the required PCB footprint. Cross-reference datasheet revisions to confirm parameter consistency.

Selection Notes

Select this component for designs requiring high-voltage isolation up to 600 V with integrated protection logic. The built-in comparator eliminates the need for external sensing circuits. Consider the SO-14 package constraints for thermal management. Verify that the input logic levels match the controlling microcontroller interface requirements.

Part Context

The L6386AD belongs to STMicroelectronics' high-voltage gate driver portfolio, designed to optimize vector motor drive systems. It complements other drivers like the L6399 and L6491 by offering embedded diagnostics and bootstrap integration. This series targets applications demanding robust performance at high switching frequencies with reduced system complexity.

Replacement Considerations

The L6386ED serves as a variant within the same family. Verify if the specific ordering suffixes indicate identical electrical characteristics. Ensure compatibility with existing PCB layouts and thermal requirements before substitution.

FAQ

How does the L6386AD handle overcurrent events?

The device integrates an inverting comparator internally referenced to 0.5 V. When a fault occurs, the DIAG output signals the event to the controlling device.

Is an external bootstrap diode required?

No, the L6386AD includes an integrated bootstrap diode, which simplifies the design and reduces the number of external components needed.