L6235N

Overview

The L6235N is a fully integrated DMOS driver for three-phase brushless DC motors, manufactured by STMicroelectronics. It operates within an 8 V to 52 V supply range and delivers a 5.6 A peak output current with a 2.8 A DC rating. The device features a typical RDS(ON) of 0.3 Ω at 25 °C and supports operating frequencies up to 100 kHz. Packaged in a 24-pin PowerDIP format, it functions across a temperature range of -40 °C to +150 °C.

Feature Summary

• Integrates a constant off-time PWM current controller with slow decay synchronous rectification
• Includes decoding logic for single-ended Hall sensors supporting 60° and 120° configurations
• Provides non-dissipative overcurrent protection on high-side MOSFETs alongside thermal shutdown
• Features integrated fast freewheeling diodes and cross-conduction protection

Applications

• Three-phase BLDC motor control systems
• Industrial motion control applications
• Automotive ignition controllers
• Speed loop regulation via tachometer output

Procurement Notes

Verify the specific package variant when ordering, as the L6235 series includes surface-mount options like the L6235Q (QFN-48) and L6235PD (PowerSO-36). Confirm that the required component matches the through-hole DIP specification intended for your design. Cross-reference datasheets to ensure compatibility with existing board layouts and thermal management strategies before finalizing procurement.

Selection Notes

Select this component for designs requiring a monolithic solution for three-phase BLDC motors without external power stages. It is suitable for applications needing integrated Hall sensor decoding and robust protection mechanisms. Consider the thermal performance and package constraints when choosing between the DIP version and other series variants based on space and cooling requirements.

Part Context

The L6235N belongs to the L6235 family of DMOS drivers designed for three-phase brushless DC motor applications. This series utilizes BCD technology to combine isolated power transistors with CMOS and bipolar circuits. The N suffix specifically denotes the PowerDIP24 package configuration, distinguishing it from surface-mount alternatives within the same functional family.

Replacement Considerations

The L6235Q and L6235PD are functionally equivalent parts within the same product line, offering identical electrical characteristics but differing in package type. These serve as direct physical replacements if PCB layout allows for QFN or PowerSO footprints instead of the standard DIP configuration.