L6494LDTR

Overview

The L6494LDTR is a high-voltage half-bridge gate driver manufactured using BCD6 OFF-LINE technology, designed for N-channel power MOSFETs and IGBTs. It features a floating high-side section capable of withstanding a voltage rail up to 500 V and transient voltages up to 600 V. 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 electrical parameters include a propagation delay of 85 ns, rise/fall times of 25 ns with a 1 nF load, and dV/dt immunity of ±50 V/ns across the full operating temperature range of -40 °C to +125 °C.

Feature Summary

• Integrated bootstrap diode simplifies PCB layout and reduces bill of materials.
• Independent UVLO protection circuits on both high-side and low-side sections prevent unsafe switch operation.
• Single input configuration with programmable deadtime and active-low shutdown pin.
• High dV/dt immunity ensures reliable performance in noisy environments.

Applications

• Medium and high capacity power MOSFET switching applications
• IGBT gate driving in industrial power converters
• Half-bridge topologies requiring high voltage isolation
• Automotive body electronics and motor control systems

Procurement Notes

Verify the specific suffix LDTR indicates tape and reel packaging when ordering. Confirm that the component meets RoHS compliance requirements for your target market. Ensure the supply chain source is authorized to guarantee authenticity. Check for moisture sensitivity level (MSL) handling instructions prior to assembly. Validate that the package type matches your PCB footprint design specifications.

Selection Notes

Select this driver for applications requiring robust high-side drive capabilities with integrated bootstrap functionality. Consider the 500 V rail capability and 600 V transient withstand voltage for high-voltage designs. Evaluate the single-input architecture if space-saving and simplified control logic are priorities. Verify compatibility with 3.3 V or 5 V microcontroller interfaces before finalizing the design.

Part Context

The L6494 belongs to STMicroelectronics' portfolio of high-voltage gate drivers built on specialized BCD technology. This series targets off-line and high-voltage power conversion markets. The L6494LDTR variant specifically denotes the tape-and-reel packaging format suitable for automated surface-mount assembly processes.

Replacement Considerations

Consult official substitution lists for equivalent half-bridge drivers with similar voltage ratings and current capabilities. Verify pinout compatibility and electrical parameter alignment before replacing the component.

FAQ

What is the maximum transient withstand voltage for the high-side section?

The high-side floating section is designed to withstand transient voltages up to 600 V.

Does the L6494 include an internal bootstrap diode?

Yes, the device integrates a bootstrap diode to simplify external circuit design.

Is the logic input compatible with 3.3 V microcontrollers?

Yes, the logic inputs are CMOS/TTL compatible down to 3.3 V.