Air blower and valve control reference design for respiratory applications


Design files


This reference design provides a compact system design capable of supporting motor acceleration and deceleration up to ±200 kRPM/s, which is a key requirement in many respirator applications. The design supports a number of offboard C2000 controllers including the TMS320F28027F, enabling a low-cost, sensor-less field oriented control (FOC). In addition, the design supports a wide input voltage range (6-28 V) capable of supporting both regulated line and battery power. To drive the air blower and valves, this design uses the DRV8323RS smart gate driver and DRV8847 motor driver, respectively.

  • Fast acceleration and deceleration up to ±200 kRPM/s
  • 10 kRPM to 40 kRPM in 250 ms (C65MS1-L5)
  • 40 kRPM to 10 kRPM in 200 ms (C65MS1-L5)
  • Wide input voltage range (6-28 V) supporting regulated DC or battery input with power protection to prevent surge, over-current, and reverse polarity
  • DRV8323RS motor driver with off-board FOC control for quiet and efficient pressurized air generation
  • Integrated driver protection features including UVLO, overcurrent, and overtemperature
Output voltage options TIDA-010072.1
Vin (Min) (V) 6
Vin (Max) (V) 28
Vout (Nom) (V) 12
Iout (Max) (A) 2
Output Power (W) 24
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Boost- Synchronous^Buck- Synchronous
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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.

TIDUER8.PDF (5728 K)

Reference design overview and verified performance test data

TIDM664.PDF (576 K)

Detailed schematic diagram for design layout and components

TIDM665.PDF (149 K)

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

TIDM666.PDF (498 K)

Detailed overview of design layout for component placement

TIDM668.ZIP (8297 K)

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

TIDCFW7.ZIP (2994 K)

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

TIDM667.PDF (2120 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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TPS6284060-nA quiescent current (IQ), 1.8-V to 6.5-VIN, high-efficiency 750-mA step-down converter

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BLDC drivers

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Data sheet: PDF
Boost controllers (external switch)

LM51223-65V Wide Vin, Current Mode Synchronous Boost Controller with Multiphase Capability

Data sheet: PDF | HTML
Digital temperature sensors

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Data sheet: PDF | HTML
ESD protection diodes

TPD4E1U06Quad 0.8-pF, 5.5-V, ±15-kV ESD protection diode in SOT-23 & SC70 packages

Data sheet: PDF | HTML
Ideal diode/ORing controllers

LM74700-Q13.2-V to 65-V, 80-uA IQ automotive ideal diode controller

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS7A02200-mA, nanopower-IQ (25 nA), low-dropout (LDO) voltage regulator with enable

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430FR215524 MHz MCU with 32KB FRAM, 4KB SRAM, comparator, 12-bit ADC, UART/SPI/I2C, timer

Data sheet: PDF | HTML
N-channel MOSFETs

CSD18532Q5B60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 3.2 mOhm

Data sheet: PDF | HTML
N-channel MOSFETs

CSD18543Q3A60-V, N channel NexFET™ power MOSFET, single SON 3 mm x 3 mm, 9.9 mOhm

Data sheet: PDF | HTML
Power blocks

CSD88584Q5DC40-V, N channel synchronous buck NexFET™ power MOSFET, SON 5 mm x 6 mm Dual-Cool™ power block, 50 A

Data sheet: PDF
Stepper motor drivers

DRV884718-V, 2-A dual H-bridge motor driver with current regulation & independent half-bridge control

Data sheet: PDF | HTML
TVS diodes

TVS330133 V Bidirectional Flat-Clamp surge protection device

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Air Blower and Valve Control Reference Design for Respiratory Applications Aug. 19, 2020

Related design resources

Hardware development

BOOSTXL-DRV8323RS DRV8323RS three-phase smart gate driver with buck, shunt amps (SPI interface) evaluation module LAUNCHXL-F28027F C2000 Piccolo MCU F28027F LaunchPad™ development kit
MSP-FET MSP MCU Programmer and Debugger

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