75V/10A Protected Full-Bridge Power Stage Reference Design for Bipolar Stepper Drives


Design files


Stepper drives are used in many applications operating typically from 12VDC to 48VDC. TI offers a rich family of stepper motor driver solutions with industry standard step/direction and parallel control interfaces.

For applications which require higher torque and power, often voltages above 48VDC, up to 100VDC are used. The TIDA-00210 provides a solution for such stepper drives. The TIDA-00210 uses two protected full-bridge power stages based on TIDA-00365 in parallel configuration. Each full-bridge operates nominal 75VDC and 10Arms phase current and features bipolar high-side current sensing leveraging a 100V full-bridge gate driver SM72295 with integrated amplifiers and four 100V NexFET power MOSFETs with ultra-low gate charge and small SON5x6 package with low thermal resistance. The power stage is fully protected against over-temperature, over-current and short-circuit between the motor terminals and motor terminals to ground. Onboard power supplies provide a 12V and a 3.3V rail for the gate driver and signal chain. The host processor interface is 3.3V I/O to connect a host MCU like C2000 Piccolo for stepper motor control.

  • Protected full-bridge power stage with input voltage up to 100VDC (75VDC nominal) and 10Arms phase current.
  • BOM reduction using SM72295 100V full-bridge gate driver with integrated amplifiers used for high-side bipolar phase current sensing, supporting up to 256 micro steps.
  • 95% efficiency at 16 kHz PWM, nominal load with very low switching losses to support higher PWM frequencies too. No heatsink required at 25C ambient and nominal load thanks to TI NexFET power MOSFET.
  • Full-bridge optimized for low EMI thanks to NexFET’s fast turn-on and turn-off switching time, 25ns with no overshoot on switch-node voltages.
  • Hardware protected against over-temperature, over-current and short circuit between phase to phase and phase to GND, as well as UVLO. Thresholds are custom configurable in HW.
  • 3.3V host processor interface allow MCU like C2000 to implement custom stepper motor control. The complementary PWM inputs and bipolar high-side current sense buffered 0-3.3V analog output allow for precise phase current control. Phase to GND voltage feedback signals allow for back EMF sensing and stall detection. An Enable signals allows the MCU to turn-on and turn-off the power stage.
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.


Reference design overview and verified performance test data

TIDRM17.PDF (793 K)

Detailed schematic diagram for design layout and components

TIDRM18.PDF (146 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRM19.PDF (286 K)

Detailed overview of design layout for component placement

TIDRM21.ZIP (9445 K)

Files used for 3D models or 2D drawings of IC components

TIDCC88.ZIP (1393 K)

Design file that contains information on physical board layer of design PCB

TIDRM20.PDF (2148 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Half-bridge drivers

SM722953-A, 100-V full bridge gate driver with Integrated current sense amplifier

Data sheet: PDF
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D-type flip-flops

SN74LVC1G175Single D-Type Flip-Flop with Asynchronous Clear

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Linear & low-dropout (LDO) regulators

LM317L100-mA, 35-V, adjustable linear voltage regulator

Data sheet: PDF | HTML

CSD19534Q5A100-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 15.1 mOhm

Data sheet: PDF | HTML
Shunt voltage references

ATL4312.5-V low-IQ adjustable precision shunt regulator

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide 75V 10A Protected Full Bridge Power Stage Bipolar Stepper Drives Design Guide (Rev. A) Sep. 28, 2016
Application note Designing with the ATL431LI Nov. 27, 2018

Related design resources

Hardware development

LAUNCHXL-F28069M F28069M LaunchPad™ development kit for C2000™ Piccolo™ MCU

Reference designs

TIDA-00111 Stepper Motor System with Medium Torque Drive TIDA-00261 High Performance Bipolar Stepper Drive Stage Reference Design with 256 Microstep Support TIDA-00736 Universal Stepper Motor Driver Reference Design TIDA-00740 Auto-Torque Implementation Reference Design TIDA-00867 24V Stepper Motor Controller with Integrated Current Sense Reference Design

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