L6386

Overview

The L6386 is a high-voltage gate driver manufactured using BCD offline technology, designed to simultaneously drive one high-side and one low-side power MOSFET or IGBT. It supports a floating voltage rail up to 600 V with dV/dt immunity of ±50 V/nsec. The device features independent outputs capable of sourcing 400 mA and sinking 650 mA, with switching times of 50 ns rise and 30 ns fall under a 1 nF load. Logic inputs are CMOS/TTL compatible, and the unit includes an integrated bootstrap diode, undervoltage lockout on both supplies, and a diagnostic comparator output.

Feature Summary

• High-voltage capability supporting floating rails up to 600 V
• Integrated bootstrap diode for compact design
• CMOS/TTL Schmitt trigger inputs with hysteresis
• Diagnostic output for fault event signaling

Applications

• Asymmetrical half-bridge configurations
• Power factor correction (PFC) circuits
• Switched-mode power supplies (SMPS)
• Motor control systems

Procurement Notes

Verify the specific suffix (e.g., AD, ED) to confirm package type and pinout compatibility. Confirm operating temperature range requirements against datasheet specifications. Ensure supply voltage limits align with system constraints. Check for moisture sensitivity classification if lead-free processing is required. Validate that the selected variant meets all electromagnetic interference standards for the target application.

Selection Notes

Select variants based on required packaging, such as SO-14 for surface mount or PDIP for through-hole. Consider the integrated comparator for overcurrent protection needs. Evaluate the dV/dt immunity for high-noise environments. Verify input logic compatibility with the controlling microcontroller. Assess thermal performance requirements for the intended operating conditions.

Part Context

The L6386 series belongs to STMicroelectronics' portfolio of high-voltage gate drivers utilizing BCD technology. This family is optimized for offline applications requiring robust isolation and high-speed switching. The devices integrate essential protection features like undervoltage lockout and diagnostic outputs, simplifying the design of efficient power conversion systems.

Replacement Considerations

Direct substitutes include L6386AD and L6386ED. Verify pinout compatibility and electrical parameters before substitution. Ensure the replacement part meets the same voltage and current ratings. Check for any differences in package dimensions or thermal characteristics.