TIDUF43 August   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Terminology
    2. 1.2 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 TPS1213-Q1 45V, Low IQ, Automotive High-Side Switch Controller With Low-Power Mode and Adjustable Load Wakeup Trigger
      2. 2.3.2 INA296x-Q1 AEC-Q100, –5V to 110V, Bidirectional, 1.1MHz, 8V/μs, Ultra-Precise Current-Sense Amplifier
  9. 3System Design Theory
    1. 3.1 Low-Power Mode Considerations
    2. 3.2 Precharge Circuit Considerations
    3. 3.3 Short-Circuit Protection
    4. 3.4 LM74704-Q1 Enable
    5. 3.5 Headers
      1. 3.5.1 Headers for Configuring INA296B-Q1
      2. 3.5.2 Headers for Configuring TPS1213-Q1
    6. 3.6 Software Considerations
      1. 3.6.1 Fuse Channel Definition
      2. 3.6.2 Software Functions
    7. 3.7 Optional Output TVS Diode
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
    2. 4.2 Software
    3. 4.3 Test Setup
    4. 4.4 Test Results
      1. 4.4.1 State Transition
      2. 4.4.2 System IQ in Low-Power Mode
      3. 4.4.3 Precharge Test
      4. 4.4.4 Overcurrent Protection
      5. 4.4.5 PWM Overcurrent
      6. 4.4.6 Short-Circuit Protection
      7. 4.4.7 Thermal Testing
      8. 4.4.8 CISPR-25 Emissions Testing
        1. 4.4.8.1 Conducted Emissions Testing
        2. 4.4.8.2 Radiated Emissions Testing
        3. 4.4.8.3 Summary of Results
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
      3. 5.1.3 PCB Layout Recommendations
        1. 5.1.3.1 Layout Prints
      4. 5.1.4 Altium Project
      5. 5.1.5 Gerber Files
      6. 5.1.6 Assembly Drawings
    2. 5.2 Documentation Support
    3. 5.3 Support Resources
    4. 5.4 Trademarks
  12. 6About the Author

3.6.2 Software Functions

Table 3-5 shows the descriptions of components tied to a software function.

Table 3-5 Software Functions
COMPONENTFUNCTIONDESCRIPTION
S1MCU RESETPress S1 to pull nRST low, which resets the MSPM0L1306-Q1
S2Toggle Fuse ChannelWhen pressed, D9 flashes a number of times to indicate which fuse channel is being used. Example: If D9 flashes 2 times, the system is using Fuse Channel 2.
S3Toggle Power ModeTransition the system between low power mode and active mode
TP13SCP_Test DiagnosisPull TP13 to GND to toggle the TPS1213-Q1 SCP_Test input pin. SCP_Test is low by default and is used for diagnosing short-circuit protection.
TP14Enable or Disable Latch Off in Cooldown ModePull TP14 to GND to enable or disable latch off in cooldown. TP14 is disabled by default. If enabled, D9 blinks 2 times to indicate latch off is enabled in cooldown. Press S2 or S3 to clear the latch and restore the output when an overcurrent fault occurs. If disabled, D9 blinks 1 time to indicate latch off is disabled in cooldown. At cooldown, the MSPM0L1306-Q1 automatically restores the output in 4s.

Indicator LEDs are also included in this board as shown in Table 3-6.

Table 3-6 LED Indicators and Descriptions
LEDNAMEDESCRIPTION
D6Output OnIndicates the output is on and not shutdown due to any faults. Place a jumper on J9 to enable D6.
D7LPM OnIndicates the system is in low-power mode. Place a jumper on J10 to enable D7. (When taking current measurements in low-power mode, depopulate jumpers on J9 and J10)
D8Fault DetectedIndicates that an overcurrent has been detected or that the TPS1213-Q1 nFLT pin has gone low.
D9Fuse Channel IndicatorIndicates which fuse channel is being used. Example: If D9 flashes 2 times, the system is using Fuse Channel 2.
D5nFLT LowIndicates the TPS1213-Q1 nFLT pin has gone low.