L6229D

Overview

The L6229D is a fully integrated three-phase motor driver manufactured by STMicroelectronics, designed for brushless DC (BLDC) motors. It utilizes BiCDMOS technology to combine isolated DMOS power transistors with CMOS and bipolar circuits on a single chip. The device operates within a supply voltage range of 12V to 52V and provides an output current of 1.4A. It features a 24-SOIC package with a junction temperature range of -25°C to 125°C. Key electrical characteristics include a typical RDS(ON) of 0.73 Ω at 25°C and an operating frequency up to 100 kHz.

Feature Summary

• Integrates a three-phase DMOS bridge with constant off-time PWM current control and Hall sensor decoding logic for 60° and 120° configurations.
• Includes non-dissipative overcurrent protection on high-side MOSFETs, thermal shutdown, undervoltage lockout, and cross-conduction protection.
• Supports slow decay synchronous rectification and provides diagnostic outputs along with a tachometer signal for speed loop feedback.

Applications

• Three-phase brushless DC motor drives
• Industrial automation systems requiring integrated motor control
• Appliance motor control applications

Procurement Notes

Verify the specific suffix 'D' corresponds to the 24-SOIC package variant when ordering. Confirm RoHS compliance status and moisture sensitivity level requirements against project specifications. Ensure the selected packaging option matches the assembly line capabilities. Cross-reference the manufacturer part number with distributor databases to confirm availability and lead times prior to finalizing procurement plans.

Selection Notes

Select this component for applications requiring a fully integrated solution for three-phase BLDC motors without external discrete power stages. Consider the 1.4A continuous current rating and 52V maximum supply voltage limits. Evaluate the thermal performance requirements given the SOIC package and junction temperature range. Verify compatibility with the intended Hall sensor configuration and PWM frequency constraints.

Part Context

The L6229 belongs to the STSPIN L62 series of motor drivers from STMicroelectronics. This series focuses on providing complete drive solutions for small to medium power BLDC motors. The L6229D specifically denotes the version housed in a 24-pin Small Outline Integrated Circuit package, distinguishing it from other variants like the PowerSO36 or QFN packages available within the same product family.

Replacement Considerations

Direct substitutes within the same package and pinout are not explicitly confirmed in the provided documentation. Review the L6229PD and L6229QTR datasheets for potential functional equivalents if package changes are permissible. Verify electrical parameter compatibility before considering alternative manufacturers.