L6388ED

Overview

The L6388ED is a high-voltage half-bridge gate driver manufactured using BCD offline technology. It supports a floating high-side voltage rail up to 600 V and provides dV/dt immunity of ±50 V/ns across the full temperature range. The device features dual outputs capable of sourcing 400 mA and sinking 650 mA, with switching times of 70 ns rise and 40 ns fall under a 1 nF load. Logic inputs are compatible with 3.3 V, 5 V, and 15 V CMOS/TTL standards. Key safety mechanisms include an internal bootstrap diode, integrated deadtime, interlocking functions to prevent cross-conduction, and undervoltage lockout (UVLO) on both supply rails.

Feature Summary

• High-voltage operation with a 600 V floating rail capability
• Integrated bootstrap diode for compact design
• Built-in deadtime and interlocking protection against cross-conduction
• CMOS/TTL logic input compatibility at multiple voltage levels

Applications

• Driving half-bridge power MOSFET stages
• Driving IGBT modules in offline power supplies
• High-voltage motor control applications

Procurement Notes

Verify the specific suffix (e.g., ED vs E) against the manufacturer's current datasheet to confirm package type and availability. Ensure the selected variant matches the required packaging format such as tube or tape and reel. Cross-reference the ordering code with official STMicroelectronics documentation to avoid discrepancies in pinout or electrical characteristics.

Selection Notes

Select this component when driving N-channel MOSFETs or IGBTs in high-voltage environments requiring robust transient immunity. The integrated bootstrap diode simplifies the circuit layout compared to external diode solutions. Ensure the control logic voltage aligns with the supported 3.3 V, 5 V, or 15 V input thresholds. Verify that the thermal performance of the system can handle the power dissipation associated with the switching frequencies and load conditions.

Part Context

The L6388E belongs to a family of high-voltage gate drivers from STMicroelectronics designed for offline applications. This series utilizes BCD technology to integrate high-voltage components with low-voltage logic on a single chip. The L6388ED specifically denotes a variant within this lineup, sharing core functionalities with other models like the L6385E and L6389E while offering specific output drive capabilities and protection features tailored for half-bridge configurations.

Replacement Considerations

Compatible substitutes within the same family include the L6385E, L6387E, L6389E, L6395, L6398, and L6399. These alternatives share similar high-voltage specifications but may differ in deadtime settings or specific drive currents. Verify pinout compatibility and electrical parameters before substitution.