DMOS driver for three-phase brushless DC motor

The L6229Q is a DMOS fully integrated three-phase motor driver with overcurrent protection.

Realized in BCDmultipower technology, the device combines isolated DMOS power transistors with CMOS and bipolar circuits on the same chip.

The device includes all the circuitry needed to drive a three-phase BLDC motor including: a three-phase DMOS bridge, a constant off time PWM current controller and the decoding logic for single ended hall sensors that generates the required sequence for the power stage.

Available in VFQFPN-32 5 x 5 package, the L6229Q features a non-dissipative overcurrent protection on the high side power MOSFETs and thermal shutdown.

Key Features

  • Operating supply voltage from 8 to 52 V
  • 2.8 A output peak current (1.4 A RMS)
  • RDS(on) 0.73 Ω typ. value @ TJ = 25 °C
  • Operating frequency up to 100 kHz
  • Non dissipative overcurrent detection and protection
  • Diagnostic output
  • Constant tOFF PWM current controller
  • Slow decay synchronous rectification
  • 60° and 120° hall effect decoding logic
  • Brake function
  • Cross conduction protection
  • Thermal shutdown
  • Under voltage lockout
  • Integrated fast free wheeling diodes

Circuit Diagram

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Technical Documentation

Product Specifications
Description Version Size
DS5988 DS5988: DMOS driver for three-phase brushless DC motor 3.1 517 KB
Application Notes
Description Version Size
AN3134 AN3134: EVAL6229QR demonstration board using the L6229Q DMOS driver for a three-phase BLDC motor control application 1.4 710 KB
Design Notes & Tips
Description Version Size
DT0045 DT0045: Design made easy with DC & BLDC motor driver tools 1.2 400 KB
DT0001 DT0001: Speed control using the L6235 or L6229 with a PWM output from a microcontroller 1.1 124 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
L6229QTR Active 1000 2.235 VFQFPN 32 5x5x1.0 Tape And Reel -40 150 NEC EAR99 PHILIPPINES 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**
L6229Q ActiveVFQFPN 32 5x5x1.0IndustrialEcopack2 0 0
L6229QTR ActiveVFQFPN 32 5x5x1.0IndustrialEcopack2 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.