L6391DTR

Overview

The L6391DTR is a high-voltage half-bridge gate driver manufactured using BCD OFF-LINE technology, designed for N-channel power MOSFETs and IGBTs. It features a floating high-side section rated for a voltage rail up to 600 V. The device supports logic inputs compatible with CMOS/TTL standards down to 3.3 V. Electrical specifications include a source current capability of 290 mA and a sink current of 430 mA. Switching times are specified as 75 ns rise and 35 ns fall with a 1 nF load. The operating supply voltage range spans from 12.5 V to 20 V.

Feature Summary

• Integrated comparator provides fault protection against overcurrent and overtemperature conditions.
• Smart shutdown function and adjustable deadtime enhance system safety and flexibility.
• High dV/dt immunity ensures reliable operation across the full temperature range.
• Built-in interlocking function prevents simultaneous conduction of high and low-side switches.

Applications

• Motor drivers for home appliances
• Factory automation systems
• Industrial drives and fans
• HID ballasts
• Power supply units

Procurement Notes

Verify the specific suffix DTR indicates tape-and-reel packaging when sourcing components. Confirm that the part number corresponds to the active L6391 series documentation from STMicroelectronics. Ensure compatibility with the required SOIC-14 surface-mount package for your PCB layout. Cross-reference the datasheet revision to confirm electrical parameters match your design requirements.

Selection Notes

Select this component for applications requiring robust high-voltage isolation and fast switching speeds. The integrated bootstrap diode simplifies circuit design by reducing external component count. Consider the 3.3 V logic compatibility if interfacing directly with modern microcontrollers or DSPs without level shifting. The adjustable deadtime feature allows optimization for efficiency in various power conversion topologies.

Part Context

This device belongs to the L6391 family of high-voltage gate drivers from STMicroelectronics. It utilizes BCD technology to integrate high-voltage capabilities with standard logic interfaces on a single chip. The family is engineered for offline applications, offering compact solutions for driving power semiconductors in demanding environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical parameter compatibility before considering alternative manufacturers or different model numbers within the same product line.

FAQ

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

The high-side floating section is designed to withstand a voltage rail up to 600 V.

Does the L6391DTR include an internal bootstrap diode?

Yes, the device features an integrated bootstrap diode to simplify the external circuit design.

How does the device handle fault conditions?

An integrated comparator is available to provide protections against overcurrent and overtemperature events.