Three phase motor driver

The L6234 is a triple half bridge to drive a brushless DC motor.

It is realized in BCDmultipower technology which combines isolated DMOS power transistors with CMOS and bipolar circuits on the same chip.

By using mixed technology it has been possible to optimize the logic circuitry and the power stage to achieve the best possible performance.

The output DMOS transistors can sustain a very high current due to the fact that the DMOS structure is not affected by the second breakdown effect, the RMS maximum current is practically limited by the dissipation capability of the package.

All the logic inputs are TTL, CMOS and μP compatible. Each channel is controlled by two separate logic inputs.

The L6234 device is available in a 20-pin PowerSO20 package.

Key Features

  • Supply voltage from 7 to 52 V
  • 5 A peak current
  • RDSon 0.3 Ω typ. value at 25 °C
  • Cross conduction protection
  • TTL compatible driver
  • Operating frequency up to 150 kHz
  • Thermal shutdown
  • Intrinsic fast free wheeling diodes
  • Input and enable function for each half bridge
  • 10 V external reference available

Circuit Diagram

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Technical Documentation

Product Specifications
Description Version Size
DS0034 DS0034: Three-phase motor driver 11.0 537 KB
Application Notes
Description Version Size
AN1088 AN1088: L6234 three phase motor driver 2.8 349 KB
Design Notes & Tips
Description Version Size
DT0045 DT0045: Design made easy with DC & BLDC motor driver tools 1.2 400 KB

Presentations & Training Material

Description Version Size
An introduction to electric motors 1.0 2 MB

Publications and Collaterals

Selection Guides
Description Version Size
STSPIN motor drivers 11.2017 1 MB
Description Version Size
Motor Control Reference Guide 15.10 2 MB
Products and solutions for Smart industry 2.0 5 MB

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Sample & Buy

Part Number Marketing Status Quantity Unit Price (US$) * Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
L6234PD013TR Active 1000 2.854 PowerSO-20 Tape And Reel -40 150 NEC EAR99 MALAYSIA MORE INFO Get Sample Add to cart DISTRIBUTOR AVAILABILITY

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6234PD013TR ActivePowerSO-20IndustrialEcopack2 (**) 0 0
L6234PD ActivePowerSO-20IndustrialEcopack2 (**) 0 0

(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.