Air blower and valve control reference design for respiratory applications
TIDA-010072
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Key Document
Description
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.
Features
- 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
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Schematic/Block Diagram
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Design Guide
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TI Devices (14)
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| CSD18532Q5B |
60V, N ch NexFET MOSFET™, single SON5x6, 3.2mOhm |
MOSFETs |
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| CSD18543Q3A |
60V, N ch NexFET MOSFET™, single SON3x3, 9.9mOhm |
MOSFETs |
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| CSD88584Q5DC |
40V, Nch synchronous buck NexFET MOSFET™, SON5x6 dualCool PowerBlock, 50A |
MOSFETs |
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| DRV8323R |
65-V max 3-phase smart gate driver with buck regulator & current shunt amplifiers |
Motor drivers |
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| DRV8847 |
18-V, 2-A dual H-bridge motor driver with current regulation & independent half-bridge control |
Motor drivers |
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| LM5122 |
3-65V Wide Vin, Current Mode Synchronous Boost Controller with Multiphase Capability |
Step-up (boost) regulators |
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| LM74700-Q1 |
3.2-V to 65-V, 80-uA IQ automotive ideal diode controller |
Power switches |
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| LMR33630 |
SIMPLE SWITCHER® 3.8V to 36V, 3A Synchronous Buck Converter With Ultra-Low EMI |
Step-down (buck) regulators |
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| MSP430FR2155 |
24 MHz MCU with 32KB FRAM, 4KB SRAM, Comparator, 12-bit ADC, UART/SPI/I2C, Timer |
Microcontrollers (MCUs) |
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| TMP1075 |
1°C I2C Temperature sensor with performance upgrades to industry standard LM75 / TMP75 |
Temperature sensors |
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| TPD4E1U06 |
Quad-channel high-speed ESD protection device |
Circuit protection ICs |
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| TPS62840 |
60-nA IQ, 1.8-V to 6.5-VIN, high-efficiency 750-mA step-down converter |
Step-down (buck) regulators |
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| TPS7A02 |
200-mA, nanopower-IQ (25 nA), low-dropout (LDO) voltage regulator with enable |
Power management |
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| TVS3301 |
33-V bidirectional flat-clamp surge protection device |
Circuit protection ICs |
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CAD/CAE symbols
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Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.
Step 1: Download and install the free download.
Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
Step 3: Open the .bxl file with the Ultra Librarian software.
You can always access the complete CAD/CAE Symbols database at https://webench.ti.com/cad/
Both PCB footprints and schematic symbols are available for download in a vendor neutral format, which can then be exported to the leading EDA CAD/CAE design tools using the Ultra Librarian Reader. The reader is available as a (free download.).
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Technical documentation
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User guide (1)
| Title | Type | Size (KB) | Date |
| | PDF | 10058 |
19 Aug 2020
|
Design files (6)
| | ZIP | 2994 |
19 Aug 2020
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| | ZIP | 8297 |
19 Aug 2020
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| | PDF | 2120 |
19 Aug 2020
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| | PDF | 498 |
19 Aug 2020
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| | PDF | 149 |
19 Aug 2020
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| | PDF | 576 |
19 Aug 2020
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