L6391D

Overview

The L6391D 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 supporting a voltage rail up to 600 V. The device operates with a supply voltage range of 12.5 V to 20 V and accepts logic inputs compatible with 3.3 V, 5 V, TTL, and CMOS standards. Key electrical parameters include a maximum operating frequency of 800 kHz, typical rise and fall times of 75 ns and 35 ns respectively with a 1 nF load, and peak output currents of 290 mA source and 430 mA sink. It functions within an industrial temperature range of -40 °C to +125 °C.

Feature Summary

• Integrated high-voltage floating high-side section capable of withstanding up to 600 V rails
• Built-in comparator providing fault protection against overcurrent and overtemperature conditions
• Smart shutdown function combined with adjustable deadtime and interlocking capabilities
• CMOS/TTL compatible logic inputs down to 3.3 V for direct microcontroller interfacing

Applications

• Motor drivers for home appliances and factory automation systems
• Industrial drives and fan control circuits
• HID ballasts and power supply units

Procurement Notes

Verify the specific suffix 'D' corresponds to the SOIC-14 tube packaging configuration as documented in official STMicroelectronics datasheets. Confirm that the component meets RoHS compliance standards required for your target market. Ensure the ordering part number matches the exact pinout and electrical specifications listed in the manufacturer's reference design documentation before finalizing procurement.

Selection Notes

Select this component when designing half-bridge topologies requiring high dV/dt immunity and integrated bootstrap diodes. It is suitable for applications needing adjustable deadtime and interlocking functions to prevent shoot-through. Consider its 600 V high-side rating and 3.3 V logic compatibility for efficient system integration without additional level shifting components.

Part Context

The L6391D belongs to the L6391 family of high-voltage gate drivers from STMicroelectronics. These devices utilize BCD OFF-LINE technology to provide robust performance in offline power conversion environments. The series is engineered to simplify layout and reduce bill of materials by integrating protection features and high-voltage handling capabilities into a single compact package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.