L6498LTR

Overview

The L6498LTR 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. Logic inputs are compatible with 3.3 V and 5 V CMOS/TTL standards. Key integrated features include an internal bootstrap diode, interlocking function to prevent simultaneous conduction, and independent UVLO circuits for both sections.

Feature Summary

• Integrated bootstrap diode simplifies PCB layout and reduces bill of materials
• Interlocking function prevents simultaneous high-side and low-side drive
• Independent UVLO protection on both high-side and low-side sections
• High dV/dt immunity ensures reliable operation in noisy environments

Applications

• Medium and high capacity power MOSFET switching applications
• IGBT gate driving in industrial motor control systems
• Off-line power supply designs requiring compact half-bridge topologies
• Inverter circuits in variable frequency drives

Procurement Notes

Verify the specific suffix 'LTR' against the official STMicroelectronics datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with the target application's voltage requirements and thermal management needs. Cross-reference the ordering part number with authorized distributors to confirm availability and authenticity. Check for RoHS compliance status as indicated in the product documentation.

Selection Notes

Select this component when a robust half-bridge driver with integrated bootstrap functionality is required. The 500 V rating suits medium-voltage applications. Consider the 2 A source and 2.5 A sink currents for driving medium-to-large power switches. The CMOS/TTL input compatibility facilitates direct interfacing with standard microcontrollers or DSPs without additional level shifting.

Part Context

The L6498 series belongs to STMicroelectronics' portfolio of high-voltage gate drivers based on BCD6 technology. This family is optimized for off-line applications, offering high reliability and integration. The L6498 specifically targets half-bridge configurations, providing essential protection features like UVLO and interlocking within a compact SOIC package.

FAQ

What is the maximum DC voltage the high-side section can withstand?

The high-side (floating) section is designed to stand a DC voltage rail up to 500 V.

Does the L6498 include an internal bootstrap diode?

Yes, the device integrates a bootstrap diode, which simplifies the external circuit design and reduces the overall bill of materials.

How does the interlocking function operate?

The integrated interlocking function prevents both device outputs from being driven high simultaneously, protecting the power switches from shoot-through conditions.