JAJU873 August   2020

 

  1.   概要
  2.   リソース
  3.   特長
  4.   アプリケーション
  5.   5
  6. 1 System Description
    1. 1.1 Medical Respiratory Systems
    2. 1.2 Respirator System Components
    3. 1.3 Key System Specifications
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Brushless DC Motor (BLDC)
        1. 2.2.1.1 DRV8323RS BLDC Motor Driver Design Calculations
        2. 2.2.1.2 BLDC Motor Driver Circuit
      2. 2.2.2 Solenoid Valve Drivers
        1. 2.2.2.1 DRV8847 Solenoid Driver Design Calculations
        2. 2.2.2.2 Solenoid Driver Circuit
      3. 2.2.3 Power Tree Architecture
        1. 2.2.3.1 Input protection - overvoltage and reverse voltage
        2. 2.2.3.2 LM5122 Boost Design Calculations
        3. 2.2.3.3 LMR33630 Buck Design Calculations
        4. 2.2.3.4 Secondary Power Stage – TPS62840 3.3V Buck
        5. 2.2.3.5 Secondary Power Stage – TPS7A02 3.3V LDO
        6. 2.2.3.6 Power Tree Circuit
    3. 2.3 Highlighted Products
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware and Software Requirements
    2. 3.2 Test Setup
      1. 3.2.1 Hardware Configuration
      2. 3.2.2 Software Configuration
    3. 3.3 Test Results
      1. 3.3.1 Motor Test Result
      2. 3.3.2 Valve Test Result
      3. 3.3.3 Power Tree Test Result
      4. 3.3.4 Key Test Summary
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Documentation Support
    3. 4.3 サポート・リソース
    4. 4.4 Trademarks
  10. 5About the Author

3.2.1 Hardware Configuration

PCB Overview

Figure 3-1 and Figure 3-2 show the top and bottom views of the TIDA-010072 with the LAUNCHXL-F28027F Launchpad (LP) connected. The top side of the LP is shown in Figure 3-3.

GUID-20200801-CA0I-2D6T-QTWH-P5XGVVBHK0NH-low.jpg Figure 3-1 TIDA-010072 Top
GUID-20200801-CA0I-0JPH-XDDN-PGTWQPKNGQCC-low.jpg Figure 3-2 TIDA-010072 Bottom
GUID-20200801-CA0I-WVL6-MFTZ-88D7RKSHMQ9P-low.jpg Figure 3-3 Launchpad Top

LaunchPad Configuration

The C2000 LaunchPad has two separate power domains for the purpose of allowing JTAG isolation. Jumpers JP1, JP2, and JP3 configure whether the USB power is passed to the target device.

When using the LAUNCHXL-F28027F, the following configuration of the LP board is necessary. The jumper and switch settings are outlined in Table 3-2. Jumpers JP1, JP2, and JP3 are disconnected because the target device will be powered from the TIDA-010072 power supply.

Table 3-2 LaunchPad Configuration

CONNECTOR

CONNECTION

DESCRIPTION

JP1

Disconnected

Enable 3.3 V to target device

JP2

Disconnected

Enable GND to target device

JP3

Disconnected

Enable 5.0 V to target device
S3 OFF Disconnect the Piccolo serial pins from the XDS100 UART
S1 OFF-ON-ON bootROM configuration

For more details, please refer to the LAUNCHXL-F28027 C2000 Piccolo LaunchPad Experimenter Kit User’s Guide.

TIDA-010072 Configuration

Table 3-3 TIDA-010072 Configuration

CONNECTOR

CONNECTION

DESCRIPTION

J1

LP

Launchpad connector

J2

LP

Launchpad connector

J3

MSP-FET JTAG

Required for valve control and TMP1075 readout

J4

Optional

MSP430FR2155 serial connector

J5

Motor

3-P BLDC Motor connector

J6

Power Input

DC Power Supply Input connector

J7

Bidirectional Valve

U21 DRV8847 OUT1 & OUT2 connector

J8

Bidirectional Valve

U21 DRV8847 OUT3 & OUT4 connector

J9

Unidirectional Valve

U22 DRV8847 OUT1 connector

J10

Unidirectional Valve

U22 DRV8847 OUT2 connector

J11

Unidirectional Valve

U22 DRV8847 OUT3 connector

J12

Unidirectional Valve

U22 DRV8847 OUT4 connector

J13

Pin 2-3

Enable LM74700 Ideal Diode Controller

J14

Pin 2-3

Enable LMR33630 12V Boost

J15

Pin 2-3

Enable TPS62840 3.3V Buck

J16

Pin 2-3

Enable TPS7A0233 3.3V LDO

J17

Optional

I2C connector for debugging DRV8847

J18

Optional

I2C connector for debugging TMP1075

System Hardware Test Setup

GUID-20200801-CA0I-TVC4-FSVW-MW9FVRZTKHV3-low.jpg Figure 3-4 HW Setup for Blower Tests

The HW setup for blower tests is shown in Figure 3-4. The test equipment used for the TIDA-010072 test session is shown in Table 3-4.

Table 3-4 Test Equipment
EQUIPMENT PART NUMBER
Adjustable power supply Chroma 62006p-30-80
C2000 LaunchPad LAUNCHXL-F28027F
Oscilloscope Teledyne LeCroy WaveSurfer 24Xs
Laptop HP Elitebook 830 G6
MSP MCU Programmer and Debugger MSP-FET
24-V Single Pole Pair BLDC Wonsmart WS7040-24-V200
24-V Single Pole Pair BLDC Boreasa C65MS1-L5
12-V Solenoid Valve, Unidirectional Operation Makeblock 59001
12-V Solenoid Valve, Bidirectional Operation Spartan Scientific 3827-B60-AA82B

The jumpers on the TIDA-010072 and LP boards were set as described in Table 3-3 and Table 3-2, respectively.

The boards were connected using the TIDA-010072 female headers (J1 and J2) to the LP male headers (J1, J5, J2 and J6) as shown in Figure 3-2. The LP was connected to the computer via a USB cable.

The power supply was connected to the TIDA-010072 J6 terminal connector and the BLDC motor was connected to the TIDA-010072 J5 terminal connector as shown in Figure 3-4. The Chroma power supply was set to 24V with the current limit set to 10A.

For the valve functional test, two Makeblock and one Spartan Scientific valves were connected to the TIDA-010072 male headers (J7, J11, J12) for unidirectional and bidirectional operation, respectively. To control the valves, the MSP-FET was connected to TIDA-010072 JTAG connector (J3) and the USB port of the laptop as shown in Figure 3-5. Note that this test is independent of the C2000 LP.

GUID-20200801-CA0I-CNPZ-X0FW-M9TQNMS6ZJ3L-low.jpg Figure 3-5 HW Setup for Valve Tests