L6234PD

Overview

The L6234PD is a triple half-bridge motor driver manufactured by STMicroelectronics, designed for driving three-phase brushless DC motors. It utilizes BiCDMOS technology to integrate isolated DMOS power transistors with CMOS and bipolar logic circuits on a single chip. The device supports an operating supply voltage range of 7V to 52V and delivers a peak output current of 5A per channel. Key electrical parameters include a typical RDSon of 0.3Ω at 25°C and an operating frequency up to 150kHz. It features TTL, CMOS, and microprocessor-compatible inputs, cross-conduction protection, thermal shutdown, and intrinsic fast free-wheeling diodes.

Feature Summary

• Integrates three independent half-bridges using BCD multipower technology for optimized logic and power stage performance.
• Provides intrinsic fast free-wheeling diodes and cross-conduction protection to ensure safe switching operations.
• Features thermal shutdown capability and high current handling due to the robust DMOS structure unaffected by second breakdown.
• Includes dedicated input and enable functions for each half-bridge along with a 10V external reference output.

Applications

• Driving three-phase brushless DC (BLDC) motors
• Industrial motion control systems
• General-purpose AC and DC motor applications

Procurement Notes

Verify component authenticity through authorized distributors or official manufacturer channels. Confirm package integrity and pin alignment against the 20-PowerDIP specification. Ensure storage conditions comply with moisture sensitivity level 1 requirements. Cross-reference datasheet revisions to confirm compatibility with specific design constraints before final procurement.

Selection Notes

Select this component when a fully integrated solution for three-phase BLDC motor control is required. The device combines logic and power stages, reducing external component count. Consider the 5A peak current and 52V maximum voltage limits to ensure adequate headroom for the target application. Verify that the 20-pin PowerDIP package fits the available PCB footprint and thermal management strategy.

Part Context

The L6234PD belongs to the STSPIN L62 series of motor drivers from STMicroelectronics. This series focuses on providing robust, mixed-technology solutions for motor control applications. The PD suffix typically denotes a specific tube packaging variant within the product line, distinct from tape-and-reel options like the L6234TR.

Replacement Considerations

• L6234