L6235Q

Overview

The L6235Q is a fully integrated DMOS driver for three-phase brushless DC motors, utilizing BCDmultipower technology to combine isolated power transistors with CMOS and bipolar circuits. It operates within an 8 V to 52 V supply range and delivers a 5.6 A peak output current with a typical on-resistance of 0.3 Ω at 25 °C. The device supports PWM frequencies up to 100 kHz and includes constant OFF-time current control, Hall sensor decoding logic, and non-dissipative overcurrent protection.

Feature Summary

• Integrates a three-phase DMOS bridge with dedicated decoding logic for single-ended Hall sensors to generate power stage sequences.
• Features non-dissipative overcurrent protection on high-side MOSFETs alongside thermal shutdown and undervoltage lockout mechanisms.
• Includes diagnostic outputs, brake functions, and tachometer outputs for speed loop implementation.

Applications

• Industrial motor control systems
• Three-phase BLDC motor drives

Procurement Notes

Verify the specific package variant, as the L6235Q is available in QFN48 configurations. Confirm RoHS compliance status and humidity sensitivity handling requirements during storage and assembly. Ensure the ordering suffix matches the required tape and reel or tray packaging specifications provided by the manufacturer.

Selection Notes

Select this component for applications requiring integrated Hall sensor decoding and synchronous rectification. Consider the QFN48 package for compact designs needing efficient thermal dissipation. Evaluate the 5.6 A peak current capability against load requirements and ensure compatibility with 60° or 120° Hall effect sensor inputs.

Part Context

Part of the STMicroelectronics L6235 series of DMOS drivers designed for three-phase brushless DC motors. The series emphasizes high integration by combining power stages with control logic on a single chip, simplifying system architecture for industrial and automotive motion control applications.

Replacement Considerations

The L6235N serves as a pin-compatible alternative in a PowerDIP24 package. Verify functional equivalence regarding current ratings and voltage limits before substitution.

FAQ

What types of Hall sensor decoding does the L6235Q support?

The device includes decoding logic for both 60° and 120° single-ended Hall sensors.

How is overcurrent protected in the L6235Q?

It features non-dissipative overcurrent protection on the high-side power MOSFETs along with thermal shutdown.