L6398D

Overview

The L6398D is a high-voltage half-bridge gate driver manufactured using BCD offline technology, designed for N-channel power MOSFETs and IGBTs. It features a floating high-side section rated for a 600 V rail. The device provides a source current of 290 mA and a sink current of 430 mA. Switching times are 75 ns rise and 35 ns fall with a 1 nF load. Logic inputs are compatible with 3.3 V and 5 V TTL/CMOS standards. It includes an integrated bootstrap diode, fixed 320 ns deadtime, and interlocking functions. Operating temperature ranges from -40°C to 150°C TJ.

Feature Summary

• High voltage rail capability up to 600 V for the floating high-side section
• Robust dV/dt immunity of ±50 V/ns across the full temperature range
• Integrated interlocking function prevents simultaneous driving of both outputs
• Fixed 320 ns deadtime simplifies control logic and layout

Applications

• Brushless DC (BLDC) motor control
• Permanent Magnet Synchronous Motor (PMSM) drives
• Offline AC-DC switching converters
• Industrial motor drive systems

Procurement Notes

Verify the specific suffix D indicates the SOIC-8 package variant when sourcing. Confirm that the ordering part number matches the required tape-and-reel or tube packaging format. Ensure the procurement documentation references the correct datasheet revision to guarantee compatibility with the specified electrical parameters and pinout configuration.

Selection Notes

Select this component for applications requiring high dv/dt immunity and simplified bill of materials due to integrated features. The fixed deadtime and interlocking functions reduce external component count. Ensure the control interface supports the specified 3.3 V or 5 V logic levels. Verify that the thermal requirements align with the 150°C junction temperature rating for the intended operating environment.

Part Context

The L6398D belongs to STMicroelectronics' L639x series of high-voltage gate drivers. It utilizes BCD offline technology to integrate high-voltage components on a single chip. This family targets offline applications where robustness against voltage transients and compact design are critical. The device serves as a bridge between low-voltage digital controllers and high-power switching elements.

Replacement Considerations

The L6398 is the base part number for this device family. The L6498 offers higher output currents but different switching characteristics. Verify pin compatibility and electrical specifications before substituting with other half-bridge drivers in the same product line.