L6498LD

Overview

The L6498LD is a high-voltage half-bridge gate driver manufactured using BCD6 OFF-LINE technology, designed for driving N-channel power MOSFETs or IGBTs. It features a floating high-side section capable of withstanding a DC voltage rail up to 500 V and 600 V transient withstand voltage. The device provides independent high-side and low-side outputs, each sourcing 2 A and sinking 2.5 A at 25 °C. Logic inputs are compatible with 3.3 V and 5 V CMOS/TTL standards. Key electrical characteristics include a propagation delay of 85 ns and switching times of 25 ns rise/fall with a 1 nF load. The operating junction temperature range spans from -40 °C to 125 °C.

Feature Summary

• Integrated interlocking function prevents simultaneous conduction of high-side and low-side outputs.
• Independent UVLO circuits on both sections protect against low-efficiency or dangerous operating conditions.
• Built-in bootstrap diode simplifies PCB layout and reduces bill of materials.
• High dV/dt immunity of ±50 V/ns ensures robust performance across the full temperature range.

Applications

• Medium and high capacity power MOSFET applications
• IGBT gate driving in off-line power supplies
• Half-bridge converter topologies requiring high voltage isolation

Procurement Notes

Verify the specific suffix 'LD' against the manufacturer's current datasheet to confirm package type and tape/reel specifications. Ensure that the ordering documentation matches the exact part number variant required for your design, as suffixes may indicate differences in packaging or testing criteria without altering the core functional parameters.

Selection Notes

Select this component when a single-chip solution for half-bridge driving is required with integrated protection features. The built-in bootstrap diode and interlocking logic reduce external component count. Verify that the control interface supports 3.3 V or 5 V logic levels and that the thermal management strategy accommodates the specified junction temperature range for the intended application environment.

Part Context

The L6498 belongs to STMicroelectronics' L6498 series of high-voltage gate drivers. This family utilizes BCD6 OFF-LINE technology to provide robust performance in demanding power electronics environments. The series is engineered to simplify the design of isolated power stages by integrating critical functions such as bootstrap diodes and protection circuits into a single compact package.

Replacement Considerations

Consult official substitution lists for verified equivalents. Generic cross-references should be validated against pinout compatibility and electrical parameter limits before implementation.