L6743

Overview

The L6743 is a high-current MOSFET gate driver manufactured by STMicroelectronics. It features two independent outputs designed to drive N-channel power MOSFETs in half-bridge configurations. The device operates with a supply voltage range of 5 V to 12 V and supports logic input levels with a minimum high-level input voltage (VIH) of 2 V and a maximum low-level input voltage (VIL) of 0.8 V. It dissipates up to 1.15 W of power and draws an operating supply current of 5 mA. The component is rated for operation between 0°C and +125°C and is available in an 8-pin SOIC package.

Feature Summary

• Dual output configuration for driving N-channel MOSFETs
• High current capability for efficient switching
• Compatible with standard logic input voltage levels
• Robust thermal performance within specified temperature range

Applications

• Half-bridge power converter circuits
• Motor control systems requiring N-channel MOSFET drivers
• DC-DC converter topologies utilizing dual gate drive signals

Procurement Notes

Verify the specific package variant and manufacturing date code upon order confirmation. Ensure that the supplier provides original manufacturer documentation or traceability records. Confirm RoHS compliance status matches project requirements. Check for any specific handling instructions related to moisture sensitivity classification during storage and assembly processes.

Selection Notes

Select this component when a dual-channel gate driver for N-channel MOSFETs is required in a compact surface-mount package. Consider the 5 V to 12 V supply range and the specific logic threshold requirements for compatibility with the controlling microcontroller or PWM generator. Evaluate the thermal dissipation capabilities against the expected switching frequency and load conditions.

Part Context

This part belongs to the family of power management integrated circuits, specifically gate drivers, produced by STMicroelectronics. These components are essential for efficiently switching power transistors in various electronic systems. The L6743 serves as a dedicated interface between low-power control logic and high-power switching elements, ensuring reliable operation in power electronics applications.

Replacement Considerations

The L6743B is a documented variant within the same product line. Verify pinout compatibility and electrical specifications before substitution. No other direct cross-references are confirmed in public documentation.