TIDA-00365

75V/10A Protected Full-Bridge Power Stage Reference Design for Brushed DC Drives

TIDA-00365

Design files

Overview

Low voltage brushed DC drives are used in many applications. TI offers a rich family of brushed DC motor driver solutions with flexible control interface options for one or more brushed DC motors up to 60V.  For applications which require higher torque and power, often voltages above 60VDC are used. The TIDA-00365 protected full-bridge operates at nominal 75VDC input and 10A output 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 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 MCU for brushed DC motor current control.

Features
  • Protected full-bridge power stage with input voltage up to 100VDC (75VDC nominal) and 10A output current
  • BOM reduction through SM72295 100-V full-bridge gate driver with integrated amplifiers used for high-side bipolar phase current sensing
  • Calibrated current sense accuracy ±1% (over full range ±10A and ±0.2% (within ±1A range)
  • Full-bridge optimized for low EMI with 25ns rise/fall time on switch-node voltages with no over- and under-shoot
  • Full-bridge protected against over-temperature, under-voltage, over- and short-circuit current between motor terminals and motor terminals to GND
  • 95% efficiency at 16 kHz PWM. No heatsink required at 25C ambient and nominal load thanks to TI NexFET power MOSFET
  • Host processor interface with dual complementary PWM inputs (3.3V CMOS) and analog outputs (0-3.3V) for bipolar high-side current sense and motor terminal voltage

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.

TIDUBV7A.PDF (1513 K)

Reference design overview and verified performance test data

TIDRN75.PDF (754 K)

Detailed schematic diagram for design layout and components

TIDRN76.PDF (79 K)

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

TIDRN77.PDF (480 K)

Detailed overview of design layout for component placement

TIDRN79.ZIP (1202 K)

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

TIDCCJ2.ZIP (1257 K)

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

TIDRN78.PDF (2626 K)

PCB layer plot file used for generating PCB design layout

Products

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 document-pdfAcrobat PDF
Analog temperature sensors

LMT89±2.5°C analog output temperature sensor, with -11.77mV/°C gain

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Comparators

LM2901VQuad Differential Comparator, Enhanced Voltage

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D-type flip-flops

SN74LVC1G175Single D-Type Flip-Flop with Asynchronous Clear

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Isolated DC/DC converters & modules

LM50187.5-100V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

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

Data sheet document-pdfAcrobat PDF open-in-new HTML
N-channel MOSFETs

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

Data sheet document-pdfAcrobat PDF open-in-new HTML
Shunt voltage references

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

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide 75-V/10-A Protected Full-Bridge Power Stage Ref Design for Brushed DC Motors (Rev. A) Mar. 16, 2017
Application note Designing with the ATL431LI Nov. 27, 2018
Application note Reducing Ringing Through PCB Layout Techniques Jun. 16, 2009

Related design resources

Hardware development

EVALUATION BOARD
LAUNCHXL-F28069M C2000 Piccolo MCU F28069M LaunchPad™ development kit

Reference designs

REFERENCE DESIGN
TIDA-00210 75V/10A Protected Full-Bridge Power Stage Reference Design for Bipolar Stepper Drives TIDA-00620 12- to 24-V, 27-A Brushed DC Motor Reference Design

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