DC-input BLDC motor drive

Products and reference designs

DC-input BLDC motor drive

Block diagram

Overview

Our integrated circuits and reference designs help you create compact, fully protected and efficient direct current (DC) input speed-controlled brushless direct current (BLDC) drives with smooth torque and accurate speed control. SoC with integrated sensorless trapezoidal or vector control ease use and reduce time to market.

Design requirements

DC-input BLDC drive designs often require:

  • Small form factor, efficient and protected power stage.
  • Efficient small form factor non-isolated and isolated power supplies.
  • IEC-compliant isolated analog and digital interfaces.
  • Motor driver with hardware-integrated sensorless trapezoidal or vector control.

Explore applications similar in function and design

Block diagram

Find products and reference designs for your system.

Advanced custom controlled BLDC drive (<60V)

DC input (<100V) DC input (<100V) DC link voltage DC link voltage DC link voltage DC link voltage Multiple supply rails Multiple supply rails Vdd Vdd FETs FETs Status LEDs Status LEDs Speed reference Speed reference Source/Sink IO. Pulse train Source/Sink IO. Pulse train Control module, PC, field network connection Control module, PC, field network connection Switch/button Switch/button Segment display Segment display Vref Vref Rotary knob Rotary knob Isolated supply rail Isolated supply rail BLDC BLDC Optional, not required for sensorless control Optional, not required for sensorless control DC link voltage DC link voltage Input power protection Input power protection eFuse/hot swap controllers eFuse/hot swap controllers Ideal diode Ideal diode Non-isolated DC/DC power supply Non-isolated DC/DC power supply DC/DC DC/DC LDOs LDOs Isolated DC/DC input/output supply Isolated DC/DC input/output supply Transformer driver Transformer driver LDO LDO Digital input/output Interface Digital input/output Interface Isolated digital input receiver Isolated digital input receiver Circuit protection Circuit protection Digital output driver Digital output driver Isolator Isolator 3-Phase power stage 3-Phase power stage Gate drivers w/ optional low-side sense amp Gate drivers w/ optional low-side sense amp Analog input interface Analog input interface LDO LDO Circuit protection Circuit protection IsoAmp IsoAmp Digital processing Digital processing MCU MCU Logic Logic Buffer Buffer Current & voltage sense Current & voltage sense Reference Reference Amps Amps Comp Comp Position sensing Position sensing Hall sensors Hall sensors Fieldbus/configuration interface Fieldbus/configuration interface USB USB Circuit protection Circuit protection Isolator Isolator RS485 RS485 CAN CAN User interface User interface Buffer/driver Buffer/driver GPIO expander GPIO expander Shift register Shift register Isolator Isolator Self-diagnostics/monitoring Self-diagnostics/monitoring Temperature sensor Temperature sensor Supervisor Supervisor Hall sensor interface Hall sensor interface Level translator Level translator Load switch Load switch

Technical documentation

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Type Title Date
Application note Architecture for Brushless-DC Gate Drive Systems (Rev. A) 22 Aug 2018
Application note Sensorless Trapezoidal Control of BLDC Motors (DRV8312-EVM) 21 May 2015
White paper Replacing single-phase ACIMs with three-phase BLDC motors saves energy 15 Apr 2016
Application note Best Practices for Board Layout of Motor Drivers (Rev. B) PDF | HTML 11 May 2022
Application note Understanding Smart Gate Drive (Rev. D) 11 May 2022
White paper Power Electronics in Motor Drives: Where is it? (Rev. A) 08 Oct 2019
Application note Trapezoidal Control of BLDC Motors Using Hall Effect Sensors 01 Jul 2013

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