L6743Q

Overview

The L6743Q is a high-voltage half-bridge gate driver IC manufactured by STMicroelectronics. It features a non-inverting input configuration and supports synchronous drive for N-channel MOSFETs. The device operates with a supply voltage range of 5V to 12V and delivers a peak output current of 3.5A. It is designed for high-side voltages up to 41V using bootstrap operation. The component functions within a junction temperature range of 0°C to 125°C and is available in an 8-VFDFPN (3x3) surface-mount package.

Feature Summary

• Provides isolated high-side and low-side gate drive signals for half-bridge power stages
• Supports synchronous rectification control for improved efficiency
• Features robust logic compatibility with standard digital interfaces

Applications

• Motor control systems requiring half-bridge topologies
• Power conversion circuits utilizing high-side switching
• Industrial motor drives and actuators

Procurement Notes

Verify the specific suffix 'Q' against official documentation, as it may indicate automotive qualification or specific reliability standards distinct from the standard L6743 variant. Confirm package availability and lead times through authorized distributors, noting that some variants may have limited stock or end-of-life status.

Selection Notes

Select this component when a compact half-bridge driver with moderate peak current capability is required. Ensure the application voltage does not exceed the 41V bootstrap limit. Consider thermal management requirements given the small 3x3mm package footprint and operating temperature range.

Part Context

The L6743Q belongs to STMicroelectronics' VIPower family of intelligent power switches and drivers. This series targets automotive and industrial applications, offering integrated protection features and high reliability. The Q suffix typically denotes compliance with automotive quality standards such as AEC-Q100.

Replacement Considerations

The ADP3650JCPZ-RL is listed as a similar alternative part number.